Health
Calorie Calculator — BMR & TDEE Estimate, Free & Private
Estimate your daily calorie needs using the Mifflin-St Jeor equation — the most clinically validated formula for BMR. Multiply by your activity level to get TDEE (Total Daily Energy Expenditure). Works for metric and imperial. Runs in your browser — your personal data never leaves your device.
Frequently Asked Questions
- How are calories calculated?
- Using the Mifflin-St Jeor equation for Basal Metabolic Rate (BMR), multiplied by an activity factor to estimate Total Daily Energy Expenditure (TDEE).
- What is the difference between BMR and TDEE?
- BMR is the calories your body burns at complete rest. TDEE adds the calories burned through daily activity and exercise.
- How do I lose or gain weight?
- A rough guide: eat about 500 kcal below TDEE to lose ~0.5 kg per week, or 500 kcal above to gain. Consult a professional for personalised advice.
- Is my data sent anywhere?
- No. All calculations run in your browser.