Calorie Calculator
Calculate your basal metabolic rate (BMR) and total daily energy expenditure (TDEE) using the Mifflin-St Jeor equation. Runs in your browser, GDPR-compliant.
Your inputs are processed in your browser and are not transmitted to our servers. Note: third-party resources (e.g. advertising and analytics from Google/Cloudflare) and an optional PayPal donation link may transfer data when loading or when clicked. Browser extensions or plugins may be able to read content that is visible in the input fields.
The result will appear here …
How to use this tool (video)
This video is hosted on YouTube. When you play it, data may be sent to Google.
Calorie Calculator: basal and total daily energy expenditure
The calorie calculator estimates your personal calorie needs using the Mifflin-St Jeor equation. Enter gender, age, height, weight and activity level, and the tool returns your basal metabolic rate (BMR) and your total daily energy expenditure (TDEE).
What is the basal metabolic rate (BMR)?
Your BMR is the energy your body needs at complete rest to keep vital functions running, such as breathing, heartbeat, temperature and organ function. It is the foundation of any calorie target and depends mainly on gender, age, height and weight.
The Mifflin-St Jeor equation
- Men: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5
- Women: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age − 161
What is TDEE?
TDEE is your BMR multiplied by an activity factor, from 1.2 (sedentary) to 1.9 (extremely active). It is the calorie intake at which your weight stays roughly stable.
Limits
Every calorie formula gives an estimate, not an exact measurement. For specific health or nutrition goals, consult a doctor or dietitian.
Frequently asked questions
How accurate is the Mifflin-St Jeor equation?
It is considered one of the most accurate simple formulas for BMR and works well for most adults. The result is an estimate, not a measurement.
Are my details stored?
No. All calculations run 100% locally in your browser. Nothing is transmitted or stored.