Weight Cut Calculator
Plan a safe weight cutting timeline from your current weight to your target fight weight, including diet phase and water cut estimates.
Inputs
Results
Total Weight to Cut
20 lbs
≈ 5 bags of sugar
Fight Day Rehydration Target
161.2 lbs
≈ 7 car tires
How to Use This Calculator
- Enter your Current Weight and Target Fight Weight in pounds.
- Set Weeks Until Fight and your Body Fat Percentage.
- Review Total Weight to Cut, Weekly Diet Loss target, and Water Cut amount.
- Check the Safety Assessment to confirm the cut is within safe limits.
- Use Rehydration Target on fight day to plan your post-weigh-in recovery protocol.
How the result changes with Current Weight
| Current Weight | Total Weight to Cut | Fight Day Rehydration Target |
|---|---|---|
| 107 | -48 lbs | 155 lbs |
| 175 | 20 lbs | 161.2 lbs |
| 256 | 101 lbs | 171.4 lbs |
| 323 | 168 lbs | 175.7 lbs |
What each input means
- Current Weight
- Your current walk-around weight in pounds.
- Target Fight Weight
- The weight class limit you need to hit at weigh-ins.
- Weeks Until Fight
- Number of weeks until your fight. Longer timelines allow safer, gradual cuts.
- Body Fat Percentage
- Estimated body fat %. Lower body fat limits how much weight you can safely lose through dieting.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersCurrent Weight = 175, Target Fight Weight = 155, Weeks Until Fight = 8, Body Fat Percentage = 15 = 4 input(s) provided
- Calculate Total Weight to CutTotal Weight to Cut20 = 20
- Calculate Fight Day Rehydration TargetFight Day Rehydration Target161.2 = 161.2
- Calculate Weekly Diet LossWeekly Diet Loss1.8 = 1.8
- Calculate Water Cut AmountWater Cut Amount7.8 = 7.8
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.
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