OnWeight · Rules Data — For Verification

Every number,
and where it came from

This is the complete per-sport dataset the app runs on — every division limit, weigh-in timing, equipment allowance and re-weigh rule — each laid out beside the governing-body source it was taken from. Built for a combat-sports / weigh-in expert to check value-by-value and sign off.

For review by Combat-sports rules expert Data source fc-engine.jsx · FC_SPORTS Sports 7 (8 rule sets, incl. BJJ gi + no-gi) Date June 2026

How to review this

Read each sport, check the values against the cited source, then sign the row off

Every sport block has the same shape, so you can move quickly:

Mechanics table — the weigh-in timing, equipment allowance, re-weigh control and plan model the app uses, each with a ^[n] pointing to its source.
Division ladders — the exact men's and women's class limits in the app, with the source ladder cited beneath.
Scale limit vs body target — the number shown is the published division limit = the weigh-in (scale) number. For sports weighed in gear, the athlete's body target = limit − equipment allowance; for underwear/singlet sports the body target ≈ the limit.
Open classes — a "+" class (e.g. +90 kg) has no upper limit; shown as open.
Sign-off row — tick Confirmed if the values match the current rulebook, or Needs change and note what to fix. (This page prints cleanly for marking up.)

Confidence pills: Verified = cross-checked against the governing body this session · By design = intentionally not a fixed table (see Muay Thai).

A · Shared mechanics

The rules that apply across sports

Three mechanics drive the cut plan regardless of sport. Confirm the logic here once; each sport block then only states its own values.

Weigh-in timing → how much water the athlete may cut

The rehydration window between weigh-in and competition sets a hard ceiling on fight-week water loss. The app maps timing to that cap:^[8]

Weigh-in timing	Example sports	Max fight-week water cut
Same day (morning of)	Amateur boxing, Wrestling, amateur Muay Thai	~0% — must be all true weight
Within ~2 h	BJJ (gi & no-gi)	~1% — minimal, conservative only
Day before (~24–32 h)	MMA, Taekwondo, Judo, pro boxing/MT	up to ~5%, bounded by the re-weigh cap

Equipment allowance

Where the rules weigh the athlete in gear, the published limit is the clothed number, so the body must come in lighter by the gear weight. Underwear/singlet sports weigh closer to the body number.

Sport	Weighed in	Allowance used
BJJ (gi)	The gi	1.7 kg (inside the documented 1.5–2.5 kg gi range)
BJJ (no-gi)	Rashguard + shorts	0.5 kg
Taekwondo	Dobok	1.2 kg
Judo	Judogi	1.2 kg
Boxing · MMA · Muay Thai · Wrestling	Underwear / singlet	none — body target ≈ limit

Re-weigh control

Judo and Taekwondo hold an official weigh-in the day/evening before, then a random control on competition morning at which the athlete must be ≤ +5% of their category limit (weighed in gear). This caps how hard they may dehydrate.^[4][5] All other sports have no re-weigh.

B · Per-sport data

Each sport: values & sources

Boxing

Verified World Boxing · Elite (from 1 Jan 2025)

Weigh-in	Amateur same day (no water cut); pro day-before on a separate ~17-class pound system.Source [1]
Equipment	None — body target ≈ division limit.Source [1]
Re-weigh	None.
Plan model	Context: amateur → walk-it-down; pro → camp cut.

Performance note in-app: amateur boxing weighs in the same day, no time to rehydrate, so the cut is all real weight — protect reach, hand speed and a clear head.

Men · scale limit (kg)

50 kg	50
55 kg	55
60 kg	60
65 kg	65
70 kg	70
75 kg	75
80 kg	80
85 kg	85
90 kg	90
+90 kg	open

Women · scale limit (kg)

48 kg	48
51 kg	51
54 kg	54
57 kg	57
60 kg	60
65 kg	65
70 kg	70
75 kg	75
80 kg	80
+80 kg	open

Source [1]: World Boxing Competition Rules (Nov 2024, in force 1 Jan 2025) — Elite kg categories; amateur same-day weigh-in (World Boxing / Olympic practice).

Open items

Category names (product decision): labels are kg-only now, replacing pro-style names that didn't match these limits. Adopt official World Boxing names if a named scheme is preferred.
Pro boxing not modelled — a separate ~17-class, pound-based system (Minimum 47.6 … Cruiser 90.7 … Heavy unlimited), day-before weigh-ins. Pull fresh if pro support is added.

Expert sign-off Confirmed as-is Needs change:

MMA

Verified ABC Unified Rules · UFC majors

Weigh-in	Day before, morning (early format since 2016); 1-lb non-title allowance.Source [2]
Equipment	None — body target ≈ division limit.
Re-weigh	None (some promotions add hydration tests, e.g. ONE).Source [8]
Plan model	Camp cut — ~24 h to rebuild, moderate water cut viable.

Performance note in-app: protect the round-to-round engine; past ~4 minutes a round runs mostly aerobic, so the cut can't cost recovery between exchanges.

Men · limit kg (lb)

Flyweight	56.7 (125)
Bantamweight	61.2 (135)
Featherweight	65.8 (145)
Lightweight	70.3 (155)
Welterweight	77.1 (170)
Middleweight	83.9 (185)
Light Heavy	93.0 (205)
Heavyweight	120.2 (265)

Women · limit kg (lb)

Strawweight	52.2 (115)
Flyweight	56.7 (125)
Bantamweight	61.2 (135)
Featherweight	65.8 (145)

Source [2]: ABC Unified Rules of MMA (official PDF) — pound limits converted to kg; UFC day-before morning weigh-in, 1-lb non-title allowance.

Open items

Class count: ABC Unified defines ~14 classes (adds Strawweight 115, Super-Light 165, Super-Welter 175, Super-Middle 195, Cruiser 225). The app shows the 8 UFC majors. Expand if supporting regional ABC promotions.

Expert sign-off Confirmed as-is Needs change:

BJJ — Gi

Verified IBJJF · adult, gi-on

Weigh-in	Same day, in the gi, immediately before you compete. Single weigh-in, no tolerance, almost no rehydration window.Source [3]
Equipment	1.7 kg (gi) — body target = limit − 1.7 kg.Source [3]
Re-weigh	None.
Plan model	Minimal — conservative, real-weight cut only.

Performance note in-app: you weigh in dressed, right before you roll — keep the cut conservative; a flat, depleted grappler gasses and loses the grip battle.

Men · gi-on limit (kg)

Galo	57.5
Pluma	64
Pena	70
Leve	76
Médio	82.3
Meio-Pesado	88.3
Pesado	94.3
Super-Pesado	100.5
Pesadíssimo	open

Women · gi-on limit (kg)

Galo	48.5
Pluma	53.5
Pena	58.5
Leve	64
Médio	69
Meio-Pesado	74
Pesado	79.3
Super-Pesado	open

Source [3]: IBJJF weight divisions (adult, gi), ibjjf.com — re-confirmed Jun 2026. Women's gi has no Pesadíssimo (tops at Super-Pesado open); women's Rooster 48.5, Heavy 79.3 confirmed.

Expert sign-off Confirmed as-is Needs change:

BJJ — No-Gi

Verified IBJJF · adult, no-gi

Weigh-in	Same day, in fight kit (rashguard + shorts), just before you roll. Almost no rehydration window.Source [3]
Equipment	0.5 kg (rashguard + shorts) — body target = limit − 0.5 kg.Source [3]
Re-weigh	None.
Plan model	Minimal — conservative, real-weight cut only.

Performance note in-app: barely any gear allowance and no time to rehydrate — keep grip and gas tank; slick scrambles punish a flat body.

Men · no-gi limit (kg)

Galo	55.5
Pluma	61.5
Pena	67.5
Leve	73.5
Médio	79.5
Meio-Pesado	85.5
Pesado	91.5
Super-Pesado	97.5
Pesadíssimo	open

Women · no-gi limit (kg)

Galo	46.5
Pluma	51.5
Pena	56.5
Leve	61.5
Médio	66.5
Meio-Pesado	71.5
Pesado	76.5
Super-Pesado	open

Source [3]: IBJJF no-gi table, ibjjf.com — re-confirmed Jun 2026. Runs ~2 kg under the gi ladder, as IBJJF specifies.

Expert sign-off Confirmed as-is Needs change:

Judo

Verified IJF · senior

Weigh-in	Evening before (official), since 2017.Source [4]
Equipment	1.2 kg (judogi) — body target = limit − 1.2 kg.
Re-weigh	Random comp-day control: ≤ +5% of category limit, weighed in judogi.Source [4]
Plan model	Camp cut.

Performance note in-app: weigh in the evening before, then a random morning check caps you at +5% — cut gradually; heavy load plus a hard cut spikes muscle-damage risk.

Men · category (kg)

−60	60
−66	66
−73	73
−81	81
−90	90
−100	100
+100	open

Women · category (kg)

−48	48
−52	52
−57	57
−63	63
−70	70
−78	78
+78	open

Source [4]: IJF Sporting & Organisation Rules — 2017 change: evening-before official weigh-in + random competition-day control ≤ +5% of the category upper limit. Corroborated by Ceylan et al. (ScienceDirect S2211266925000830; PMC10484915).

Expert sign-off Confirmed as-is Needs change:

Taekwondo

Verified World Taekwondo · Olympic

Weigh-in	Day before + random same-day control.Source [5]
Equipment	1.2 kg (dobok) — body target = limit − 1.2 kg.
Re-weigh	Random morning control: ≤ +5% of category limit (WT Competition Rules Art. 9 §2.2). Plus-categories excluded; no 2nd attempt.Source [5]
Plan model	Camp cut.

Performance note in-app: a random morning check caps you at +5% of your category, so you can't over-dehydrate — lean on that guardrail and protect explosive, repeated kicks.

Men · category (kg)

Fly −58	58
Feather −68	68
Middle −80	80
Heavy +80	open

Women · category (kg)

Fly −49	49
Feather −57	57
Middle −67	67
Heavy +67	open

Source [5]: World Taekwondo Competition Rules, Article 9 §2.2 ("the random weigh-in shall be conducted with plus 5% tolerance of the contestant's weight category"). Olympic categories (olympics.com / WT); corroborated by British Taekwondo 2024 weigh-in policy.

Open items

Category set: WT World Championships use 8 categories/gender (−54, −58, −63, −68, −74, −80, −87, +87). The app uses the Olympic 4. Confirm the target competition.

Expert sign-off Confirmed as-is Needs change:

Wrestling

Verified UWW · senior freestyle

Weigh-in	Same day, morning of competition, in singlet; multi-day events re-weigh each morning.Source [6]
Equipment	None (singlet) — body target ≈ limit.
Re-weigh	No tolerance; same-day → almost no rehydration window.
Plan model	Walk-it-down — real weight only, no fight-week water cut.

Performance note in-app: you weigh in the morning you wrestle — make the cut real weight, not water; protect scramble power and gas tank.

Men · freestyle (kg)

57 kg	57
61 kg	61
65 kg	65
70 kg	70
74 kg	74
79 kg	79
86 kg	86
92 kg	92
97 kg	97
125 kg	125 top

Women · freestyle (kg)

50 kg	50
53 kg	53
55 kg	55
57 kg	57
59 kg	59
62 kg	62
65 kg	65
68 kg	68
72 kg	72
76 kg	76

Source [6]: United World Wrestling senior freestyle categories + same-day morning weigh-in, uww.org — re-confirmed Jun 2026.

Open items

Class set: the Olympics use a 6-category subset (57, 65, 74, 86, 97, 125); the app uses the full 10-category World-Championship ladder. Reasonable default — confirm the target event.

Expert sign-off Confirmed as-is Needs change:

Muay Thai

By design No universal table · free-entry

Weigh-in	Varies: pros ~24 h before; amateurs (IFMA) same day, in fight attire.Source [7]
Equipment	None (fight attire).
Re-weigh	Varies by body (e.g. ONE ≤5% regain test).
Plan model	Free-entered goal weight — the athlete sets their own limit.

Performance note in-app: no single Muay Thai standard, so we work from your target; where it's same-day, treat it like amateur boxing — real weight only.

Men · illustrative (kg)

Flyweight	51
Bantamweight	53.5
Featherweight	57
Lightweight	61
Welterweight	67
Middleweight	72.5

Women · illustrative (kg)

Atomweight	47
Flyweight	50.8
Bantamweight	53.5
Featherweight	57
Lightweight	61

Source [7]: No universal Muay Thai weight table — WBC Muaythai (~17–19 boxing-style classes), Thai stadiums (Lumpinee / Rajadamnern) and IFMA amateur all differ. The classes above are illustrative only; the product intentionally takes a free-entered goal weight.

Open items

Do not present these six as authoritative in UI copy — they are placeholders behind a free-entry field. Confirm this is the intended behaviour.

Expert sign-off Confirmed as-is Needs change:

C · Open decisions

What still needs a call (product, not data)

None of these block the numbers above — they're scope/labelling choices for the team once the data is signed off.

Item	Current choice	Decision needed
Boxing category names	kg-only ("50 kg" … "+90 kg")	Keep kg-only, or adopt official World Boxing names?
MMA class count	8 UFC majors	Expand to the ~14 ABC Unified classes for regional promotions?
Taekwondo set	Olympic 4 / gender	Add the WT World-Champs 8 / gender if targeting WCh?
Wrestling set	10-class World-Champs	Offer the 6-class Olympic subset as an option?
Pro boxing / Muay Thai	Not modelled	Add the pro pound-based systems later?

D · Sources

Where every value came from

Division ladders, weigh-in rules and the re-weigh tolerances above are drawn from the following governing-body and peer-reviewed sources. Numbers in the sport blocks reference these by ^[n].

World Boxing — Competition Rules (approved Nov 2024, in force 1 Jan 2025) — Elite kg category ladder; amateur same-day weigh-in practice (World Boxing / Olympic). Governing body: World Boxing.
Association of Boxing Commissions — Unified Rules of MMA — official pound limits (converted to kg); UFC day-before morning weigh-in and 1-lb non-title allowance. ABC Unified Rules (official PDF) · UFC.
IBJJF — Weight Divisions (adult, gi & no-gi) — gi-on and no-gi class limits; weigh-in in kit immediately before competition, single attempt, no tolerance. ibjjf.com · re-confirmed Jun 2026.
IJF — Sporting & Organisation Rules (2017 change) — evening-before official weigh-in + random competition-day control ≤ +5% of the category upper limit, in judogi. Corroborated: Ceylan et al., ScienceDirect S2211266925000830; PMC10484915.
World Taekwondo — Competition Rules, Article 9 §2.2 — random same-day weigh-in with +5% tolerance of the weight category; plus-categories excluded; no second attempt. Olympic categories. olympics.com / WT · British Taekwondo 2024 weigh-in policy (corroboration) · confirmed Jun 2026.
United World Wrestling — senior freestyle categories — 10-class World-Championship ladder (men) and women's freestyle ladder; same-day morning weigh-in, in singlet. uww.org · re-confirmed Jun 2026.
Muay Thai — no universal standard — WBC Muaythai, Lumpinee / Rajadamnern stadiums and IFMA amateur all differ; pros ~24 h before, amateurs same-day. Handled as free-entry by design. Multiple sanctioning bodies.
ISSN 2024 position stand — nutrition & weight-cut strategies for MMA / combat sports — context for MMA regain & hydration testing and the weigh-in-timing → water-cap mapping. PMC11894756.

Cross-checked three ways for this report: the live engine values (fc-engine.jsx · FC_SPORTS), the project source-of-truth (Logic & Flows §17, already sourced), and an independent governing-body re-check this session. The verifier of this document is a design session, not a sanctioned official — these values still require sign-off by someone who runs these weigh-ins before a build relies on them.