Estimate daily calorie needs by multiplying estimated BMR by an activity factor.
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BMI, BMR, calorie needs, body measurements and heart-rate estimates for general reference.
Enter the requested values above and select Calculate. The result updates immediately on the page, so you can change one value and compare different scenarios without leaving the calculator.
This is a general estimate; actual energy needs vary with health, training, body composition and other factors.
Estimate daily calorie needs by multiplying estimated BMR by an activity factor. It is designed for quick estimates and everyday problem solving. When a calculation affects a contract, tax filing, medical decision or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
The sample 30-year-old adult with moderate activity uses a BMR estimate multiplied by 1.55 to estimate maintenance calories.
An activity multiplier produces a starting estimate, not a measured daily energy expenditure.
Actual needs vary with medical status, activity, and body composition; make changes based on qualified health guidance.
Related tools: BMI Calculator · TDEE Calculator
Estimate daily calorie needs by multiplying estimated BMR by an activity factor.
Estimated daily calories = Mifflin–St Jeor BMR × selected activity factor.
Yes. ERICH Calculators is free to use and no account is required.
The BMR portion uses the Mifflin–St Jeor equation. The activity multiplier is a general estimate, so actual calorie needs can vary.
See how formulas, sources and limitations are handled across ERICH Calculators.