Calorie Calculator for Cutting: Eat the Right Deficit to Keep Muscle

The right cutting calorie intake is your TDEE minus 15–20% — a steady 1–1.5 lb/week fat loss that protects muscle. A 200 lb lifter with a TDEE of 2,800 cuts to around 2,200–2,400 calories. Crash deficits of 1,000+ calories read as "faster results" but cost lean mass, strength, and training performance. The free calorie calculator gives you your TDEE in seconds, and this guide covers how to turn that number into a cut that actually works.

The Right Deficit Size for Cutting

Cutting isn't just "eat less." The size of the deficit decides how much of what you lose is fat vs. muscle:

Deficit	Weekly fat loss	Muscle retention	Best for
10%	~0.5 lb	Excellent	Already lean, final-10-lb cuts, advanced lifters
15–20%	~1 lb	Very good	Most physique goals, intermediate lifters
25–30%	~1.5 lb	Moderate	Higher body fat, beginner lifters, short runs
35%+	~2 lb	Poor	Only under medical supervision, rarely worth it

The sweet spot for almost everyone is 15–20%. That's ~500 calories below TDEE for most people, which lines up with the classic "500-calorie deficit for 1 lb/week" rule — backed by decades of physique-prep literature.

How to Calculate Your Cutting Calories

1. Open the free calorie calculator.
2. Enter age, gender, height, and current weight.
3. Set activity level honestly. If you lift 4x/week and have a desk job, that's Moderately Active, not Very Active. Overestimating activity is the #1 reason cuts stall.
4. Note your TDEE (the maintenance number).
5. Multiply TDEE by 0.80 for a 20% deficit, or 0.85 for 15%. That's your cutting target.

Example: 180 lb male, 30 years old, 5'10", moderately active. TDEE ≈ 2,650. Cut target: 2,650 × 0.80 = 2,120 calories/day. That delivers roughly 1 lb/week loss.

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Protein and Macros While Cutting

Calories decide fat loss; protein decides whether you keep muscle. During a cut:

• Protein: 0.8–1.0 g per lb of goal body weight. For a 180 lb lifter targeting 170, that's ~150–170 g/day.
• Fats: 0.3–0.4 g per lb body weight (minimum) for hormonal health. Going too low on fats tanks testosterone and mood.
• Carbs: fill the rest. Higher on training days, lower on rest days if you're tracking precisely.

For the full macro breakdown from your calorie target, use our free macro calculator guide. The calorie number tells you the size of the deficit; macros tell you what shows up in the mirror.

How Long to Cut (And When to Take a Diet Break)

Cuts work best in runs of 8–16 weeks, not permanent "low calorie lifestyles." Metabolic adaptation kicks in — your TDEE slowly drops as you lose weight, and the same deficit stops producing the same result.

• Weeks 1–4: Linear progress. Stick to plan.
• Weeks 5–8: Recalculate TDEE with new body weight. Drop cut target accordingly.
• Weeks 9–12: If progress stalls for 2+ weeks, take a 1–2 week "diet break" at maintenance calories. Hormones recover, then resume the cut.
• After 16 weeks max: End the cut, eat at maintenance for 4–8 weeks, then re-evaluate.

Adjacent tools: body fat percentage for weight loss, and progress tracking by percentage.

Common Cutting Mistakes to Avoid

• Going under 1,500 calories (men) or 1,200 (women) without medical supervision. Dangerous, and your metabolism fights back hard.
• Skipping leg day "to save calories." Training volume is what signals your body to keep muscle during a deficit. Cut volume = lose muscle.
• "Clean eating" as a strategy without tracking. Salads with hidden oils, nut butters, granolas — calorie-dense health foods can bury a deficit fast.
• Ignoring liquid calories. A daily latte, protein shake, and "recovery" drink can be 500–800 calories that wipe out your deficit.
• Not adjusting as weight drops. Your 2,200-calorie cut at 200 lb is a 2,000-calorie cut at 180 lb. Recalculate every 10–15 lb lost.

Frequently Asked Questions

What's the best cutting calorie deficit for beginners?

15–20% below TDEE is the sweet spot. For most beginners that's 400–600 calories below maintenance, producing 1–1.5 lb/week loss while allowing strength to progress.

Should my deficit be different on training vs. rest days?

Calorie cycling (higher on training days, lower on rest) works for advanced lifters but isn't necessary. A flat daily deficit is simpler and produces nearly identical results.

How often should I recalculate my cutting calories?

Every 10–15 lb of weight lost, or when fat loss stalls for 2+ weeks. Your TDEE drops as you drop weight, so the calorie target that worked at 200 lb won't work at 180 lb.

Can I build muscle while cutting?

Newer lifters and people with higher body fat can recomp (lose fat + gain muscle simultaneously). Advanced lifters near their genetic potential usually can't — you're either cutting or gaining.

What if I hit a plateau during my cut?

Check tracking accuracy first (most stalls are "I forgot about that handful of almonds"). Then try a 1–2 week diet break at maintenance before resuming the deficit. If you've been cutting for 12+ weeks, end the cut entirely.