Calorie Calculator
Estimate daily calories to maintain, lose or gain weight. An estimate, not medical advice.
Inputs
Result
Enter your values to see the result.
How it works
Your basal metabolic rate (calories burned at rest) is estimated with the Mifflin–St Jeor equation, then multiplied by an activity factor to estimate the calories that keep your weight steady. A 500 kcal daily change is roughly 0.5 kg per week.
- BMR = 10·kg + 6.25·cm − 5·age + 5 (men) | − 161 (women)
- maintenance = BMR × activity factor (1.2 – 1.9)
- lose / gain = maintenance ∓ 500 kcal
Assumptions
- These figures are estimates, not medical advice. Real needs vary from person to person. Check with a doctor or dietitian before changing your diet.
- Uses the Mifflin–St Jeor equation, intended for adults aged 15–100. Activity factors are standard approximations.
Every calculation runs in your browser. Nothing you enter is uploaded.
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