How to Use the Combat Sport Weight Cut Calculator
Making weight for your division is mandatory in combat sports, but cutting too aggressively can hurt performance and lead to injury. Enter your current weight, target weight class, and days until weigh-in to see whether your cutting plan is at a safe pace, needs caution, or is at a dangerous level.
Sports medicine generally considers 0.5-1% of body weight per week a safe cutting rate. Within that range, most of the loss comes from fat and water, with minimal impact on strength and performance. Exceeding 1.5% per week sharply raises the risk of muscle loss, dehydration, and reduced focus.
If your result comes back as "dangerous," consider extending your timeline or moving up to the next weight class. Weight cutting varies significantly with individual body fat, metabolism, and hydration status, so if you have a competition coming up, it's safest to consult a trainer or sports medicine professional before proceeding.
Frequently Asked Questions
A commonly cited safe range is 0.5-1% of body weight per week. 1-1.5% is on the fast side and requires careful monitoring, while exceeding 1.5% sharply raises the risk of muscle loss and impaired performance.
It's commonly used by athletes, but carries real risk — dehydration can cause dizziness, reduced strength, and in severe cases kidney strain. It should only be done under the guidance of a trainer or medical professional.
Consider extending your timeline or moving up to a higher weight class. Cutting too much weight too fast can hurt both performance and health, so consulting a professional is the safest path forward.