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Health Calculator

Calorie Calculator

TDEE (maintenance)
2,507kcal / day

BMR: 1,618 kcal · multiplier ×1.55

Lose (~−500)2,007 kcal
Maintain2,507 kcal
Gain (~+300)2,807 kcal

Educational estimate only — not medical advice. BMR and TDEE vary with muscle mass, health conditions, and measurement error. Consult a clinician or registered dietitian before major diet changes.

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What Is a Calorie Calculator?

A calorie calculator estimates how many calories you burn at rest (BMR) and across a typical day with activity (TDEE). Those numbers help set daily targets to lose, maintain, or gain weight.

Mifflin-St Jeor Formula

Men: BMR = 10×kg + 6.25×cm − 5×age + 5
Women: BMR = 10×kg + 6.25×cm − 5×age − 161
TDEE = BMR × activity multiplier

Activity Multipliers

  • Sedentary: ×1.2
  • Light: ×1.375
  • Moderate: ×1.55
  • Active: ×1.725
  • Very active: ×1.9

Frequently Asked Questions

What is BMR vs TDEE?

BMR is calories burned at complete rest. TDEE is BMR scaled by activity — your estimated daily maintenance calories.

How many calories to lose weight?

A common starting point is about TDEE − 500 kcal/day (~0.5 kg / 1 lb per week), adjusted with results and professional guidance.

Is Mifflin-St Jeor accurate?

It is one of the better population formulas for adults, but still an estimate — not a lab measurement.

Is this calorie calculator free?

Yes — free, private, no account required. Runs in your browser.