cutting weight calculator

How this cutting weight calculator works

This tool helps you set a realistic fat-loss phase (a “cut”) by combining your body data with standard energy equations. It estimates your maintenance calories first, then subtracts a deficit based on how quickly you want to lose weight. From there, it builds simple macro targets for protein, fat, and carbs.

What it calculates

• BMR: Basal Metabolic Rate using the Mifflin-St Jeor formula.
• TDEE: Total Daily Energy Expenditure based on activity level.
• Cut calories: Daily calories after applying your selected deficit pace.
• Expected weekly loss: In both kilograms and pounds.
• Macro targets: Protein and fat floors, then carbs with remaining calories.
• Goal timeline: If you enter a goal weight, it estimates how long your cut may take.

Choosing the right cutting pace

The best pace depends on training history, body fat level, performance goals, and lifestyle stress. Faster is not always better. In many cases, consistency with a moderate deficit beats aggressive dieting.

Recommended weekly rates

• 0.25% per week: Great for preserving performance and muscle.
• 0.5% per week: A practical default for most people.
• 0.75% per week: Better for shorter, focused cuts.
• 1.0% per week: Usually temporary and harder to sustain.

If your gym performance drops hard, hunger is intense, sleep suffers, or mood tanks, your deficit may be too steep. A smaller deficit often improves adherence and keeps training quality higher.

Protein, fat, and carbs during a cut

Protein

Protein is the priority in a cut. It supports muscle retention and satiety. A range of 1.6–2.2 g/kg bodyweight is common, with many lifters doing well around 2.0 g/kg.

Fat

Dietary fat supports hormones and overall health. Most people should avoid pushing fat too low for long periods. The calculator sets a minimum by bodyweight so your plan remains practical.

Carbohydrates

After protein and fat are set, carbs fill the remaining calories. Carbs are especially useful for training output, recovery, and mood. If carbs come out very low, your overall calorie target may need adjustment.

How to use your results in real life

• Track bodyweight daily and use a 7-day average.
• Keep step count and training volume relatively stable.
• Reassess every 2 weeks, not every 2 days.
• If progress stalls for 2+ weeks, reduce calories slightly or increase activity.
• Use diet breaks when fatigue accumulates during longer cuts.

Important note: fat cut vs. water cut

This calculator is for fat loss, not rapid dehydration before a same-day weigh-in. Competitive water cuts (combat sports, powerlifting weigh-ins) require sport-specific planning and close supervision due to health risks.

Final thoughts

A good cut is not the most aggressive one; it is the one you can execute for weeks while keeping strength, energy, and consistency. Use this calculator as a starting point, then adjust based on real progress data from your body and training log.