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Weight Cut & Class Calculator

A planning tool built on combat-sport sports-science methodology — it separates the slow gradual descent from the fight-week cut, scores the risk, and checks it against your weigh-in timing and body composition.

Your normal current weight — not your goal weigh-in number.
Used to set a safe gradual descent rate and the risk score.
Recovery time is the single biggest limit on a safe acute cut.
If known (DXA / calipers / BIA), unlocks your minimum safe weight & class-fit check.

Screening & education tool, not medical advice. Acute weight cutting carries health and performance risk — large or rushed cuts need qualified supervision.

Fill in the form to get a target class, a week-by-week descent rate, your fight-week cut, a risk score, and a rehydration target.
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Current division fit -
Recommended target class -
Total to lose -
Phase 1

Gradual descent (off-camp → fight week)

Arrive at fight week near-
Target rate of loss-
Weight-Making Risk Score-
-
Phase 2

Fight-week acute cut

Acute cut needed-
Safe ceiling for your timing-
-
Phase 3

Post weigh-in recovery

Regain target before competing-
-

Division list

Turn this into a real plan →

How it splits the cut

Body fat and muscle change slowly; only body water and gut contents move fast. So the plan loses fat gradually and saves the water/fibre/glycogen shift for fight week. Combat Sports Nutrition, Ch.12.

Why timing caps the cut

A day-before weigh-in can support up to ~10% acute loss; a same-day weigh-in closer to ~5%, with women ~1–2% lower. Less recovery time = smaller safe cut. Combat Sports Nutrition, Ch.12.

What it can't see

It doesn't know your hydration status, cut history, menstrual cycle, heat tolerance, or how you feel. Treat the output as a starting conversation, not a prescription.