Estimate how many calories you burn each day with the Mifflin-St Jeor formula. Enter your age, gender, weight, height and activity level to see your estimated daily calorie needs. This is a simple estimate for guidance only — not medical advice. Free, with no sign-up needed.
How to Use
- Enter your age, gender, weight and height.
- Choose the activity level that best describes your week.
- Click Calculate Calories to see your estimated daily calorie needs.
Key Features
- Mifflin-St Jeor formula – a widely used estimate of daily energy needs.
- Five activity levels – from sedentary to very active.
- Clearly labelled estimate – for guidance, not medical advice.
- 100% private – everything runs in your browser; nothing is sent anywhere.
FAQs
Is this calorie calculator free?
Yes. It is completely free with no sign-up and no limits.
How accurate is the estimate?
It is a simple estimate based on averages. Real calorie needs vary with body composition, health, medication and many other factors, so treat the figure as a starting point, not a prescription.
Should I eat fewer calories to lose weight?
A modest, sustained calorie deficit usually leads to gradual weight loss, but nutrition quality and overall health matter too. Speak to a qualified professional for personal advice.
Is my data stored anywhere?
No. The calculation runs entirely in your browser and nothing is transmitted or saved.