UFC & Boxing Weight Classes in Stone

Why UK Fans Need This Page

American combat sports are built on pounds. The UFC lists every division in lbs and kg. Sky Sports, TNT Sports and DAZN broadcast weigh-ins with pound figures. But British and Irish fans think in stone — and converting 185 lbs to stone on the spot, mid-broadcast, is exactly the kind of mental arithmetic that ruins the moment.

This page is the definitive reference. Every active UFC division and all 17 professional boxing weight classes, converted to stone and pounds with precision verified to six decimal places. Bookmark it before the next weigh-in.

UFC Men's Weight Classes in Stone — 2026

The UFC currently runs 8 men's divisions. Limits shown are the title fight maximums — non-title bouts allow 1 lb over. All conversions are Python-verified to 6 decimal places.

70 kg to stone and pounds. Note that 265 lbs (Heavyweight limit) converts to 18st 13lb — just one pound short of a round 19 stone.

UFC Women's Weight Classes in Stone — 2026

The UFC runs 4 women's divisions. Title fight limits shown.

All 17 Professional Boxing Weight Classes in Stone

Professional boxing recognises 17 divisions across the WBC, WBA, IBF and WBO, all using identical limits. Green rows mark the original eight Victorian-era divisions — the ones set in stone by British regulators in the 19th century, whose stone values are still exactly preserved in today's pound limits.

calculate your BMI by height. Green rows = the 8 original Victorian divisions. Six of the 17 limits convert to perfectly round stone figures.

The Victorian Stone Connection

Six of the 17 professional boxing weight limits convert to exact whole or half-stone values. This is not coincidence — it is the direct inheritance of British regulation.

When British boxing administrators codified the eight original divisions in the late 19th century, they set limits in stone and pounds: Flyweight at 8 stone, Featherweight at 9 stone, Middleweight at 11 stone 6 lbs, Welterweight at 10 stone 7 lbs.

When American sanctioning bodies converted to pounds for international use, they took the exact pound equivalent of each stone figure. The clean stone numbers are preserved in every division that dates from that era. British fans who think about boxing in stone are not using an outdated system — they are reading the sport exactly as its founders intended.

Weight Cutting — What Fighters Actually Weigh

The weight shown at a weigh-in is not the weight carried into the ring or octagon. Professional boxing weigh-ins occur 24 hours before the fight, allowing full overnight rehydration. UFC weigh-ins are typically the morning before an evening event — also approximately 24 hours.

Walk-around weights — the natural, comfortable weight a fighter maintains between camps — typically run 10 to 20 lbs above division limit. A UFC Lightweight (11 st 1 lb limit) often walks at 12 to 12.5 stone between fights. A Welterweight (12 st 2 lb limit) commonly walks at 13 to 14 stone.

Frequently Asked Questions