BMR Calculator - Daily Calorie Needs
Free BMR and TDEE calculator using the Mifflin-St Jeor formula. See your basal metabolic rate and daily calories for every activity level, with a chart.
Find your Basal Metabolic Rate and the calories you burn per day at every activity level, using the trusted Mifflin-St Jeor formula. See a clear chart and table. Everything runs in your browser.
How to Use BMR Calculator - Daily Calorie Needs
- Choose units and sex. Pick metric or imperial, and male or female.
- Enter age, height and weight. These drive the Mifflin-St Jeor formula.
- Pick your activity level. This sets the headline daily calorie figure.
- Read your numbers. See your BMR, your daily calories for the chosen activity, and a chart and table of calories at every level.
- Save it. Print a clean copy or copy a share link.
Frequently Asked Questions
What is BMR?
Basal Metabolic Rate is the number of calories your body burns at complete rest just to keep you alive, such as breathing and circulation. It is the starting point for your daily calorie needs.
What is TDEE?
Total Daily Energy Expenditure is your BMR multiplied by an activity factor. It estimates the calories you burn in a typical day including movement and exercise.
Which formula does it use?
It uses the Mifflin-St Jeor equation, which is widely regarded as one of the most accurate everyday formulas for estimating BMR.
How do I use this to lose or gain weight?
Eating around your TDEE keeps your weight steady. Eating below it tends to lose weight, and above it tends to gain. A change of about 500 calories a day is a common starting point.
Is my information sent anywhere?
No. Everything runs in your browser. Your details never leave your computer and the tool works offline once loaded.
Is this medical advice?
No. These are estimates for general guidance. For a plan tailored to you, speak with a doctor or dietitian.