Calorie Calculator
Estimate daily calories from body details and activity level.
Calorie Calculator
Estimate daily calories from body details and activity level.
About this calorie calculator
The calorie calculator estimates how many calories the body uses in a day. It first finds your basal metabolic rate (BMR) from age, sex, height, and weight, then multiplies it by an activity factor to give total daily energy expenditure (TDEE) — roughly the calories needed to maintain your current weight.
From that maintenance figure it derives target intakes for losing or gaining weight at a steady pace. The output is a planning estimate, not a medical prescription; real needs vary with body composition, health conditions, and how active a day actually is.
Common uses
- Estimate daily maintenance calories before planning meals or setting a calorie target.
- See how changing your activity level shifts the number of calories you burn.
- Get rough intake targets for losing or gaining weight at a sensible rate.
Helpful tips
- Choose the activity level honestly; over-stating activity is the most common reason estimates run high.
- Re-check the estimate after a noticeable weight change, since BMR shifts with body weight.
- Treat the numbers as a starting point and adjust based on real results over a few weeks.
How to use Calorie Calculator
- Enter the amounts, dates, rates, or assumptions needed for Calorie Calculator.
- Check units, currency, tax rate, interest rate, date range, and rounding assumptions before calculating.
- Run the calculator and compare the result against your source values or a second scenario when planning matters.
- Adjust one input at a time to understand how the estimate changes.
- Use the result as a practical estimate, then confirm important financial, tax, health, or legal decisions with a qualified source.
Frequently asked questions
What is the difference between BMR and TDEE?
BMR is the energy your body uses at rest. TDEE multiplies BMR by an activity factor to estimate total daily calories burned, including movement and exercise.
Is the calorie estimate medical advice?
No. It is a general planning estimate. For medical, pregnancy, or clinical nutrition needs, consult a qualified health professional.
Is Calorie Calculator free, and does it work on mobile?
Yes. Calorie Calculator is free to use on JustBloc with no account or installation, and the page is designed to work on desktop, tablet, and mobile browsers.