UFC Weight Classes: Every Division and Its Limit in Pounds
The UFC weight classes in order, from 115-pound strawweight to 265-pound heavyweight, with each limit in pounds and the U.S. commission rules behind them.
By CricketTaken EditorialPublished UFC & MMA24 min read
- Men's divisions
- 8
- Women's divisions
- 4
- Lightest limit
- 115 lb
- Heaviest limit
- 265 lb
On the morning of May 6, 2022, in Phoenix, Charles Oliveira stepped onto a scale run by the Arizona commission as the UFC lightweight champion and stepped off it as a former one. The scale read 155.5. Half a pound over, in a title fight, and the belt was gone before a punch was thrown. He won the fight the next night anyway and left the cage with nothing around his waist.
That half pound is the whole subject in miniature. The UFC has twelve weight classes: eight for men, running flyweight (125 pounds), bantamweight (135), featherweight (145), lightweight (155), welterweight (170), middleweight (185), light heavyweight (205) and heavyweight (265), and four for women, running strawweight (115), flyweight (125), bantamweight (135) and featherweight (145). Each number is an upper limit. A fighter may weigh less than it and cannot weigh more, with a single pound of grace in fights where no title is at stake. The limits are not the UFC's invention. They come from the Unified Rules of Mixed Martial Arts, and in the United States they are enforced by state athletic commissions, whose officials read the scale.
Every UFC weight class in order, with its limit in pounds
Start with the list, lightest to heaviest. The names are borrowed from boxing; the numbers are not, which causes confusion for anyone who knows a boxing lightweight as a 135-pounder.
| Division | Upper limit | Non-title limit | First UFC champion crowned |
|---|---|---|---|
| Women's strawweight | 115 lb | 116 lb | 2014 |
| Women's flyweight | 125 lb | 126 lb | 2017 |
| Women's bantamweight | 135 lb | 136 lb | 2012 |
| Women's featherweight | 145 lb | 146 lb | 2017 |
| Flyweight | 125 lb | 126 lb | 2012 |
| Bantamweight | 135 lb | 136 lb | 2010 |
| Featherweight | 145 lb | 146 lb | 2010 |
| Lightweight | 155 lb | 156 lb | 2001 |
| Welterweight | 170 lb | 171 lb | 1998 |
| Middleweight | 185 lb | 186 lb | 2001 |
| Light heavyweight | 205 lb | 206 lb | 1997 |
| Heavyweight | 265 lb | 266 lb | 1997 |
A few of those dates need a footnote, because the UFC renamed its classes in 2001 and the lineages carried over. The welterweight title began life in 1998 as a "lightweight" belt for fighters under 170 pounds. The light heavyweight title began in 1997 as a "middleweight" belt. The dates above follow the lineage rather than the label, which is how the promotion itself counts.
- 8Men's divisions
- 4Women's divisions
- 115Lightest limit in pounds
- 265Heaviest limit in pounds
Limits under the Unified Rules of Mixed Martial Arts as used by the UFC. Women's featherweight is counted among the four women's classes although its title has been vacant since June 2023.
Twelve on paper, then, and eleven in working order. The women's featherweight class has had no champion since Amanda Nunes retired, a point taken up further down. Every other division has a titleholder and a ranked list of fifteen contenders beneath, which our guide to how the rankings are compiled covers in full.
One convention to keep straight: a division is named by its ceiling. A "170-pounder" is a welterweight who weighed 170 or 171 on Friday morning. What that fighter weighs on Saturday night is a different number and a different argument.
The one-pound allowance and who actually reads the scale
A non-title lightweight can weigh 156. A lightweight fighting for the belt has to weigh 155.0 or less. The difference is a single pound written into commission practice across the United States, and it produces a small oddity every fight week: the challenger and the champion are held to a stricter standard than everyone else on the card in the same division.
The reasoning is old and comes from boxing. A championship is a claim to be the best at a stated weight, so the stated weight has to mean exactly what it says. Everyone else gets the pound as a tolerance for scales, for nerves, for the last few ounces that will not come off.
The commission owns the scale
The UFC does not weigh its fighters in any official sense. Where an event is held in a regulated state, the state's athletic commission supplies or certifies the scale, a commission official calls the number, and that number is the only one that counts. The Nevada State Athletic Commission does it in Las Vegas, the New York State Athletic Commission at Madison Square Garden, the California State Athletic Commission in Anaheim or Sacramento. The promoter stands to one side. A fuller account of what these bodies do sits in our guide to the state athletic commission and its powers.
Since 2016 the official weigh-in has been held on the morning of the day before the fight, inside a set window, in a hotel room with little ceremony. The afternoon event with the music and the staredowns is theater. Nobody's weight is recorded there.
What missing costs
In a non-title bout, a fighter who misses usually forfeits a share of the purse to the opponent, and the fight goes ahead at a catchweight if the opponent agrees. In a title bout the consequences are heavier and they fall unevenly. A champion who misses is stripped on the scale, as Oliveira was. A challenger who misses can still fight but cannot win the belt, which is what happened to Deiveson Figueiredo in Norfolk, Virginia, in February 2020: he came in over the flyweight limit for a vacant-title fight, won it, and the title stayed vacant.
The procedures, the purse penalties and the extra time some commissions allow are set out in the UFC weigh-in rules. For this page the point is narrower. The limit is a commission rule, the allowance is a commission rule, and neither bends because a promoter would like it to.
Heavyweight, the only division with a floor and a ceiling
Every other class is defined by one number. Heavyweight has two. A heavyweight must weigh more than the 205-pound light heavyweight limit and no more than 265, a window of roughly sixty pounds that is as wide as the entire span from the flyweight limit to the middleweight limit.
The floor is almost a formality. Anyone light enough to make 205 can fight at light heavyweight, and nobody is turned away from heavyweight for being small. The ceiling is where the rule bites. A man who walks around at 285 has to lose twenty pounds to fight in the UFC at all, because there is nowhere above 265 for him to go.
The consequence is the only division in the sport where two fighters can make weight properly and still be separated by forty pounds or more. The clearest example on the record is UFC 91 in Las Vegas on November 15, 2008. Randy Couture, the champion, weighed in at 220. Brock Lesnar, the challenger, weighed in at 265, the limit exactly. Forty-five pounds, legally. Lesnar won in the second round.
It would be lazy to read too much into one result. Couture had beaten bigger men before, and lighter heavyweights have held the belt since. Size at heavyweight buys less than the raw number suggests, because the extra mass has to be carried for up to twenty-five minutes and the lighter man is often the faster one. Still, the division asks a question no other division asks: how much is forty pounds worth against speed? Every other weight class exists so that the question never comes up.
Why the UFC has never run a super heavyweight class
The Unified Rules do list a super heavyweight division, for anyone over 265 pounds, with no upper limit. The UFC has never used it and has never suggested it will.
The practical case against is thin talent. Athletes who weigh 280 or 300 pounds and can fight at a professional level for fifteen minutes are rare, and the ones who exist can generally reach 265 with a manageable cut. Splitting an already shallow heavyweight pool in two would leave two weak divisions in place of one adequate one.
There is also a memory at work. The early UFC, which had no weight limits, put on mismatches of size that were closer to carnival than sport. At UFC 3 in Charlotte in September 1994, Keith Hackney, listed at about 200 pounds, fought Emmanuel Yarbrough, a sumo competitor listed at more than 600. Hackney won. It was the kind of spectacle the sport spent the next decade persuading regulators it had left behind, and a super heavyweight class would be a step back toward it.
Why the gaps between divisions widen as the weights go up
The steps are not even. From flyweight up to lightweight each class sits ten pounds above the last. Then the stride lengthens: fifteen pounds from lightweight to welterweight, fifteen more to middleweight, twenty to light heavyweight, sixty to the top of heavyweight.
The usual defense is proportion. Ten pounds means more to a 125-pound athlete than to a 185-pound one, so wider absolute gaps higher up keep the relative gaps about the same. The arithmetic half supports that. Ten pounds on top of 125 is an 8 percent step. Ten on top of 145 is a little under 7 percent. Fifteen on top of 155 is nearly 10 percent, and twenty on top of 185 is nearly 11. So the proportional gap does not hold steady. It drifts upward, and the jump from lightweight to welterweight is proportionally larger than any jump below it.
Then comes heavyweight, where the step from 205 to 265 is about 29 percent and the proportional argument gives up entirely.
The fighters the gaps leave stranded
Uneven steps create two awkward zones. One is the space between 155 and 170. A fighter whose frame settles at a healthy fighting weight of 160 or so has a choice between a hard cut to lightweight and giving away size at welterweight, with nothing in between. The other is between 185 and 205, twenty pounds with no stopping place, which is why so many light heavyweights are former middleweights who gave up the cut and so few go the other way.
The gaps were not designed. They were inherited. The limits of 155, 170, 185, 205 and 265 were settled when regulators first wrote the sport down, at a time when the UFC had five classes and no interest in more. The lighter divisions were added later at intervals of ten because that is what fit under 155. Nobody ever sat down with a blank page and spaced twelve divisions sensibly, and it shows.
The Unified Rules classes the UFC leaves empty: 165, 175, 195 and 225
In the summer of 2017 the Association of Boxing Commissions, the body through which American and Canadian regulators agree on common rules, voted to add four weight classes to the Unified Rules. Super lightweight at 165 pounds. Super welterweight at 175. Super middleweight at 195. Cruiserweight at 225. The push came largely from California, whose commission was looking for ways to reduce dangerous weight cuts and saw more classes as one of them.
The full list as it has stood since then:
| Unified Rules class | Upper limit | Used by the UFC |
|---|---|---|
| Strawweight | 115 lb | Yes, women only |
| Flyweight | 125 lb | Yes |
| Bantamweight | 135 lb | Yes |
| Featherweight | 145 lb | Yes |
| Lightweight | 155 lb | Yes |
| Super lightweight | 165 lb | No |
| Welterweight | 170 lb | Yes |
| Super welterweight | 175 lb | No |
| Middleweight | 185 lb | Yes |
| Super middleweight | 195 lb | No |
| Light heavyweight | 205 lb | Yes |
| Cruiserweight | 225 lb | No |
| Heavyweight | 265 lb | Yes |
| Super heavyweight | Over 265 lb | No |
A commission adopting a weight class obliges nobody to promote fights in it. The classes are available. Any promoter licensed in a state that has adopted them can stage a 165-pound title fight tomorrow. The UFC, which accounts for most of the sport's audience in the United States, has not touched one of the four. The story of how the rulebook itself came to exist is told in the history of the Unified Rules.
The argument over 165
Of the four, only 165 has a real constituency. Fighters have campaigned for it for years, usually big lightweights tired of the cut or small welterweights tired of being outsized. The neatest version of the proposal moves welterweight up to 175 at the same stroke, which would turn the awkward 155-170-185 sequence into 155-165-175-185: four classes at even ten-pound steps where there are now three at fifteen.
The UFC's leadership has turned the idea down every time it has been raised in public. Two reasons are generally offered. One is that lightweight and welterweight are the two deepest divisions on the roster and a class between them would thin both. The other is that every new belt slightly cheapens the rest.
Both reasons are real and neither is decisive. A promotion that staged fifteen-odd fights for interim titles in a decade is not, on the evidence, worried about having too many belts. The more persuasive explanation is inertia: the current classes sell, and a company with no competitor pressing it has little reason to redraw its own map. The health case for 165 is the stronger one, and the sport's regulators made it nearly a decade ago.
The UFC women's weight classes and the ceiling at 145
The four women's divisions arrived in a different order from their weights, and they have not fared equally.
Bantamweight came first. The UFC named Ronda Rousey its inaugural women's champion at 135 pounds in December 2012, carrying over the title she held in Strikeforce, and her fight with Liz Carmouche at UFC 157 in Anaheim on February 23, 2013, was the first women's bout in the promotion's history. Strawweight followed in December 2014, built through a season of The Ultimate Fighter that ended with Carla Esparza beating Rose Namajunas for the first 115-pound belt. Flyweight was added the same way in December 2017, when Nicco Montano won the tournament final.
Those three are full divisions in every sense: a champion, a ranked top fifteen, a steady supply of contenders, title fights several times a year.
Featherweight, a title without a division
Women's featherweight was something else. The UFC created the 145-pound title in February 2017 at UFC 208 in Brooklyn, where Germaine de Randamie beat Holly Holm, two fighters who had made their names at bantamweight. De Randamie was stripped that June after declining to defend against Cris Cyborg, the fighter for whom the class had fairly obviously been created. Cyborg won the vacant belt the following month. Amanda Nunes took it from her in fifty-one seconds in December 2018 and held it until she retired in June 2023.
Across those six years the division never had rankings. There were not fifteen featherweights on the roster to rank. Title challengers were bantamweights moving up or newcomers signed for the occasion, and between title fights the class effectively ceased to exist. Since Nunes left, the belt has sat vacant, and the UFC's published rankings list three women's divisions, not four. It is fair to call featherweight dormant. Whether it is abolished is a question the promotion has not answered in writing.
Why nothing is offered above 145
Nothing in the rules stops a women's lightweight or welterweight division. The Unified Rules weight classes apply to men and women alike. Other American promotions have gone higher: the Professional Fighters League ran a women's lightweight season at 155 pounds, which is where Kayla Harrison built her record before dropping two classes to join the UFC at bantamweight in 2024.
The obstacle is numbers. A division needs enough fighters under contract to fill a ranked top fifteen and supply credible challengers, and the pool of professional women competing above 145 has not supported that. Featherweight was the test, and featherweight could not be filled. At the other end of the scale, the UFC has also left out atomweight, the 105-pound class that promotions such as Invicta FC have run for years.
From no limits at all to two classes: how the divisions were built
UFC 1, held in Denver on November 12, 1993, had no weight classes. That was the premise. Eight men of different sizes and different disciplines in a one-night tournament to find out which style won, with the smallest man in the field, Royce Gracie, winning it. Our account of that first tournament goes through it fight by fight.
The open-weight idea lasted a little over three years. By 1997 the promotion was under heavy political pressure in the United States, banned from most cable systems and shut out of most states, and the absence of weight classes was one of the easiest objections for critics to make.
UFC 12 and the first split
At UFC 12 on February 7, 1997, in Dothan, Alabama, the field was divided for the first time. Heavyweight was for fighters of 200 pounds and over. Lightweight was for everyone under 200. That same night Mark Coleman beat Dan Severn to become the first UFC heavyweight champion.
The scheme was refined event by event. The under-200 class was soon renamed middleweight. A new lightweight class for fighters under 170 appeared in 1998, and a class at 155 and under followed in 2000 under the name bantamweight. The labels from this period are a trap for anyone reading old results: a 1999 "lightweight" champion was what would now be called a welterweight.
New Jersey and the reset
The lasting change came from a regulator. In 2000 the New Jersey State Athletic Control Board agreed to sanction mixed martial arts under a written set of rules, and UFC 28 in Atlantic City that November was the promotion's first event under them. Those rules, refined at a meeting of regulators and promoters the following spring, became the Unified Rules, and they carried a schedule of weight classes with them.
At UFC 31 in May 2001 the UFC relabeled everything to match. The 155-pound class became lightweight. The 170-pound class became welterweight. A new middleweight division was opened at 185. The old middleweight belt became the light heavyweight title at 205, and heavyweight acquired its ceiling of 265. Five divisions, with the names and limits still in use today.
Lightweight shelved and brought back
One of the five nearly did not survive. Jens Pulver, the first lightweight champion, left the UFC in 2002 in a contract dispute. A tournament to replace him ended at UFC 41 in February 2003 with a draw between B.J. Penn and Caol Uno, so no champion emerged. The promotion, losing money and unconvinced that smaller fighters sold tickets, let the division lapse. For about two years the UFC staged almost no fights at 155.
It returned in 2006, and Sean Sherk won the revived title that October. Lightweight has since been, by most measures, the deepest division in the sport. That the UFC once judged it not worth keeping is the best single argument against treating the promotion's view of any weight class as settled.
The expansion years: three new men's classes and four for women
Between late 2010 and the end of 2017 the UFC went from five divisions to twelve. Most of that growth came from absorbing a sister promotion, and the rest from discovering that women's fights drew.
- May 2001The five-division structure is set under the Unified Rules: lightweight, welterweight, middleweight, light heavyweight and heavyweight.
- Late 2010The WEC merger is announced. Its featherweight and bantamweight champions, Jose Aldo and Dominick Cruz, become the UFC's first at 145 and 135.
- September 2012Demetrious Johnson wins a four-man tournament to become the first flyweight champion at 125.
- December 2012Ronda Rousey is named the first women's bantamweight champion, and fights in the Octagon two months later.
- December 2014Carla Esparza wins the first women's strawweight title at 115.
- 2017Women's featherweight opens in February and women's flyweight in December, completing the present twelve.
Dates are those of the first UFC champion in each class under its present name and limit. The five classes of 2001 carried over earlier title lineages under older names.
World Extreme Cagefighting was a California promotion that the UFC's parent company bought in 2006 and ran as a separate brand that came to specialize in the lighter classes. It was where the best featherweights and bantamweights in North America fought. In October 2010 the company announced that the two rosters would merge. The WEC's featherweight champion, Jose Aldo, and its bantamweight champion, Dominick Cruz, were recognized as the UFC's first champions in those classes, and the first UFC title fight at featherweight took place at UFC 129 in Toronto in April 2011.
Men's flyweight needed building from nothing. The UFC ran a four-man tournament through 2012, and Demetrious Johnson won it at UFC 152 that September. He went on to defend the belt eleven times in a row, a UFC record, in a division the promotion spent part of that period openly considering closing. Flyweight survived. It is a reminder of the lightweight story from a decade earlier, with a better ending for the fighters involved.
The women's classes are described above. Two of the four, strawweight and flyweight, were launched through The Ultimate Fighter, with the tournament winner crowned champion at the finale; our guide to the format of that reality series explains how those seasons worked. No division has been added since 2017. Only the five-division arrangement of 2001 to 2010 has gone longer without a change.
Champions in two UFC weight divisions at once
Holding two belts at the same time is the rarest thing a UFC fighter can do. Four have done it.
| Fighter | Divisions held together | Second belt won |
|---|---|---|
| Conor McGregor | Featherweight and lightweight | UFC 205, November 12, 2016 |
| Daniel Cormier | Light heavyweight and heavyweight | UFC 226, July 7, 2018 |
| Amanda Nunes | Women's bantamweight and featherweight | UFC 232, December 29, 2018 |
| Henry Cejudo | Flyweight and bantamweight | UFC 238, June 8, 2019 |
The table is complete through October 2026, and it could grow.
Each case required the same unlikely sequence: a reigning champion permitted to challenge for a second title while keeping the first, in an adjacent division, against a champion or for a vacant belt, and winning. The promotion grants that permission sparingly because it freezes a division. A champion preparing for a fight one class up is a champion not defending at home, and fifteen ranked contenders wait.
What happened next shows why. McGregor never defended the featherweight title; the UFC took it from him two weeks after UFC 205. Cormier gave up the light heavyweight belt before the end of 2018. Cejudo relinquished flyweight within months. Only Nunes kept both for years and defended both while holding them, and she could do so because one of her two divisions barely existed. There was no queue at featherweight to hold up.
Two belts, but not together
A longer list of fighters have won titles in two divisions at different times: Randy Couture, B.J. Penn, Georges St-Pierre, Jon Jones and Alex Pereira among them. The recent pattern is instructive. Ilia Topuria gave up the featherweight title in 2025 before he fought for the lightweight one. Islam Makhachev vacated lightweight the same year before he challenged at welterweight. Both won. Neither was ever a simultaneous double champion, because the UFC required the first belt to be handed back as the price of the second opportunity.
That looks like policy now, even if nobody has announced it as one. It keeps divisions moving, and it leaves the four names in the table looking more like products of a particular few years than the start of a tradition.
Champions who try and fail are a category of their own. B.J. Penn, then lightweight champion, lost to Georges St-Pierre at welterweight in 2009. Israel Adesanya, the middleweight champion, lost at light heavyweight in 2021. Alexander Volkanovski, the featherweight champion, lost twice at lightweight in 2023. The step up is usually fifteen or twenty pounds, and the uneven gaps described earlier are a large part of why it fails more often than it works.
The number on the scale against the weight in the cage
A UFC lightweight weighs 155 pounds for a few minutes on Friday morning. By Saturday night, about thirty-six hours later, the same fighter is commonly around fifteen pounds heavier, and sometimes more than twenty.
The mechanism is water. In the final days before the weigh-in a fighter sheds fluid through restricted intake, heat and sweat, makes the limit in a dehydrated state, then spends the next day and a half drinking and eating it back. Commissions that have weighed fighters a second time on fight night, California's most systematically, have recorded regains of well over ten percent of body weight in some cases.
So the divisions do not sort fighters by how much they weigh when they fight. They sort them by how much they can temporarily lose. A lightweight bout is a contest between two people who were each able to reach 155 at the same hour, and their fight-night weights may differ by a good deal depending on who cut more and who recovered better.
Two things follow for anyone reading a weight class at face value. The limits understate the size of the athletes, at every class except heavyweight, where few fighters cut at all. And the move to morning weigh-ins in 2016, intended to give fighters longer to rehydrate safely, also gave them longer to regain mass, which arguably made large cuts more attractive.
The practice has costs that fall outside this page: fighters hospitalized, bouts cancelled on the day, and a long regulatory argument about how to stop it. The site's explainer on weight cutting in MMA and why the clock causes it takes that on directly.
Catchweight bouts, the fights that belong to no division
Not every UFC fight is contested at one of the twelve limits. A catchweight is any agreed weight that is not a division limit, and it comes about in two quite different ways.
The first is by arrangement. Two fighters from neighboring divisions, or two who want to avoid a hard cut on short notice, agree in advance to meet at, say, 140 pounds or 195. The commission approves the weight and holds both to it, with the same one-pound allowance. These fights carry no title and do not belong to either division's records in any formal sense, though the ranking panel was always free to weigh the result however it liked.
The second is by failure. A fighter misses the contracted limit, the opponent agrees to go ahead anyway, and the bout is reclassified as a catchweight at whatever the heavier fighter weighed. The fighter who missed gives up part of the purse. This is far more common than the planned kind.
The most disruptive example in recent memory came in September 2022 in Las Vegas. Khamzat Chimaev, booked for a welterweight main event at UFC 279, weighed in at 178.5, seven and a half pounds over the non-title limit. That was too far over for the fight to stand. The promotion reshuffled three bouts on the day of the weigh-in, matching fighters by who had weighed what, and the card went ahead with a different main event from the one that had been sold.
Why titles are never contested at a catchweight
A UFC championship is tied to a division limit, and no belt changes hands at an agreed in-between weight. If two champions from different classes meet, they meet at one division's limit for that division's title. Boxing has been looser about this, with catchweight clauses negotiated into title fights by the bigger name. In the UFC the commission's limit is the limit, which is one of the cleaner features of the sport's rulebook. The rest of that rulebook, from fouls to stoppages, is covered in the UFC rules explained.
UFC weight classes against boxing's seventeen
Boxing recognizes seventeen weight classes, from minimumweight at 105 pounds to an unlimited heavyweight division, and two of its sanctioning bodies have added an eighteenth between cruiserweight and heavyweight. The UFC covers the men's range from 125 pounds upward with eight.
The difference is clearest in the middle of the scale. Between 135 and 160 pounds boxing has five divisions: lightweight at 135, super lightweight at 140, welterweight at 147, super welterweight at 154 and middleweight at 160. Across a comparable span the UFC has three. In that stretch of the scale a boxer never gives away more than seven pounds to move up. A UFC fighter gives away ten at best and fifteen in the divisions where most of the roster lives.
Fewer classes cut both ways. They make each UFC title scarcer, and scarcity is worth something. With one promotion and one belt per division, the UFC's eleven active classes can have at most eleven undisputed champions. Boxing, with four major sanctioning bodies each crowning a champion in every class, can have several dozen at once, a situation explained in our guide to the WBC, WBA, IBF and WBO. A casual fan can name the UFC lightweight champion. Naming the four men holding boxing's lightweight belts is a job for specialists.
The cost is carried by the fighters who fall between two UFC weights. Boxing gives a 142-pound athlete a division built around that size. The UFC gives a fighter with a natural fighting weight of 162 a choice between two imperfect options and a commission scale. More divisions would mean more belts and thinner fields. Fewer means harder cuts and more fighters competing a size too big or too small. The UFC made its choice in 2001, added to it only at the light end, and has left the heavier gaps alone ever since.
For the wider sport beyond the UFC, including boxing and the amateur codes, the site's combat sports section gathers the related explainers in one place.