Water cut viabilidade
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The 'water cut viability' calculator helps Mixed Martial Arts (MMA) athletes determine the percentage of weight reduction needed to reach a specific limit. This is crucial for competitions where fighters must fit into a weight class. The formula used is ((Limit weight - Current weight) / Current weight) × 100, expressing the change in percentage terms.
It is particularly useful during the water cut phase, a common practice before events. For example, if a fighter weighs 80 kg and needs to reach 75 kg, the calculator shows that 6.25% of body mass must be lost. This allows for planning safe dehydration strategies, such as using a sauna or reducing water intake.
It is important to use the tool to monitor healthy limits, avoiding excessive losses that could compromise performance or health. Cautions include: not using it for non-athletes, validating data with a nutritionist or doctor, and considering natural water retention. Water cutting should be guided by professionals to avoid risks.
If the result is very high (over 10%), it indicates the athlete needs to reassess realistic goals. The calculator also helps determine if the cut is feasible within the available time frame, balancing dehydration with muscle recovery. Always pair the tool with an appropriate diet and hydration plan.
Frequently asked questions
How does the calculator formula work?
The formula calculates the difference between current and limit weight, divides by current weight, and multiplies by 100 to get the percentage of weight to lose.
When should I use this calculator?
Use it during MMA event weight-cut preparation to plan safe dehydration strategies and monitor realistic limits.
What does a high percentage result mean?
Percentages above 10% indicate an aggressive cut that should be reviewed with a professional to avoid health risks.
Can I use this calculator for other sports or goals?
Not recommended for non-athletes or general weight loss. It's specific to water cuts in competitions.
Do I need professional guidance when using the calculator?
Yes. Always consult a nutritionist or doctor to ensure the cut is safe and tailored to your physical condition.