HEALTH & FITNESS
BMR Calculator
Find your Basal Metabolic Rate — calories burned at rest.
100% free
No sign-up
Private — runs in your browser
Instant results
KEY TAKEAWAYS
- Find your Basal Metabolic Rate — calories burned at rest.
- Free to use — no sign-up, no account and no usage limits.
- Runs entirely in your browser, so the numbers you enter stay private.
- Works on desktop and mobile with instant, accurate results.
Last updated: June 2026
About the BMR Calculator
Your BMR is the energy your body uses at complete rest. We use the Mifflin-St Jeor equation and also show daily needs at different activity levels.
Frequently asked questions
What's the difference between BMR and TDEE?
BMR is at-rest energy. TDEE multiplies BMR by an activity factor for your total daily burn — see the Calorie Calculator.
Free online tool from ConvertFleet. Calculations run entirely in your browser — nothing you type is sent anywhere. Results are estimates for general guidance only.