Cutting Calculator
Cutting in the gym context is not just general weight loss. The goal is to drop body fat while keeping as much hard-earned muscle and training performance as possible. That changes how you set calories and macros. Deficits are usually moderate, not extreme, because aggressive cuts can tank session quality, recovery, and strength output. Protein also needs to stay higher than it would in maintenance or a bulk so your body has a stronger signal to hold onto lean mass while calories are lower. Most productive cuts run somewhere around 8 to 16 weeks before a diet break, maintenance phase, or transition into another goal. Cutting forever is a bad plan. The longer you stay in a deficit, the harder it gets to recover, train hard, and keep adherence high. A good cut should be measured, boring, and effective. You want enough structure to get leaner without digging such a deep hole that you lose performance, muscle, or the ability to stick to the plan.
For informational purposes only
This calculator provides estimates based on established scientific formulas. Results are not medical or nutritional advice. Individual needs vary. Consult a registered dietitian or healthcare provider before making significant dietary changes, especially if you have a medical condition.
Cutting setup
Moderate deficit, high protein, and enough training fuel to keep performance from falling off.
Activity level
Cut aggression
Enter your stats to calculate cutting calories and macros.
Frequently asked questions
What is cutting in fitness and bodybuilding?
Cutting is a planned fat-loss phase designed to reduce body fat while preserving as much muscle mass and performance as possible. It is usually paired with resistance training, higher protein intake, and a controlled calorie deficit. The goal is not just to weigh less, but to look leaner without flattening out all the muscle you built beforehand.
How big of a calorie deficit should I use when cutting?
For most lifters, a deficit of roughly 250 to 750 calories per day covers the useful range. Smaller deficits work well when you are already lean or want to preserve performance aggressively. Moderate deficits suit most people. Larger deficits can work when body fat is high, but they usually demand tighter protein intake and better fatigue management.
Why is protein so important when cutting?
Protein is your main dietary defense against muscle loss in a deficit. It supports muscle protein synthesis, helps with satiety, and makes it easier to maintain lean mass while body fat drops. The harder the deficit, the more important protein becomes. That is why cutting macros are usually more protein-heavy than maintenance macros.
How do I lose fat without losing muscle?
Keep lifting, keep protein high, avoid unnecessary crash dieting, and recover like it matters. You do not preserve muscle by eating as little as possible. You preserve muscle by giving your body a reason to keep it, which means training hard, sleeping enough, and not pushing the deficit harder than your situation requires.
How long should a cutting phase last?
A practical cutting phase often lasts 8 to 16 weeks, depending on how much fat you are trying to lose and how lean you already are. Past that point, diet fatigue tends to build quickly. Many lifters do better with a maintenance phase or diet break before deciding whether to continue.
Should I do cardio when cutting?
Cardio can help create extra energy expenditure, improve conditioning, and let you keep calories a little higher, but it is not mandatory. Most lifters get the best results by using enough cardio to support the deficit without letting it interfere with lower-body recovery, gym performance, or overall adherence.
What should my macros be when cutting?
Cutting macros usually emphasize protein first, then allocate enough fat to support hormones and enough carbs to keep training quality respectable. A high-protein setup with moderate carbs and moderate fat is common because it gives you the best shot at muscle retention while still supporting productive lifting sessions.