TDEE Calculator
Estimate daily calorie needs from age, size, and activity.
Uses the Mifflin-St Jeor equation for BMR, then multiplies by activity factor. Estimates only — not medical advice.
How to use the TDEE tool
- Enter your tdee in the fields above.
- Adjust any slider or type an exact number — the answer updates as you go.
- Copy the result and close the tab. Nothing you entered was sent anywhere.
About the TDEE tool
Uses the Mifflin-St Jeor equation to estimate basal metabolic rate, then multiplies by an activity factor to give total daily energy expenditure.
Helpful for setting calorie targets for weight loss, maintenance, or gain. These are estimates only and not a substitute for professional advice.
Everything runs locally in your browser: no data is uploaded, no account is needed, and it works offline once the page has loaded.
Embed this tool
Customize and copy an iframe. Linking back helps both sites.