About Calorie Calculator
The Calorie Calculator estimates how many calories you burn per day (TDEE — total daily energy expenditure) from your sex, age, height, weight and activity level, using the Mifflin–St Jeor equation that most dietitians consider the best general-purpose BMR formula.
Along with your maintenance calories it shows daily targets for mild and standard weight loss (−250 and −500 kcal) and for gaining (+250 and +500 kcal) — roughly a quarter and half kilogram per week respectively.
Metric and imperial units are both supported. Results are estimates for healthy adults; talk to a professional before making major changes.
How to Use the Calorie Calculator
- Choose your units, sex and age.
- Enter your height and weight.
- Pick the activity level that matches a typical week.
- Read your maintenance calories plus loss and gain targets.
Features
- Mifflin–St Jeor BMR with five activity multipliers
- Targets for losing, maintaining and gaining weight
- Metric and imperial inputs
- Instant, private calculation
Frequently Asked Questions
What's the difference between BMR and TDEE?
BMR is the energy your body burns at complete rest. TDEE multiplies BMR by an activity factor to include daily movement and exercise — it's the number to eat at to maintain weight.
Why a 500-calorie deficit for weight loss?
A pound of body fat stores roughly 3,500 kcal, so a 500 kcal daily deficit averages about 0.5 kg (1 lb) of loss per week — widely considered a sustainable pace.
Is the Calorie Calculator free?
Yes, the Calorie Calculator is completely free with no usage limits. No signup, no account and no installation required.
Is my data safe?
Yes. All processing happens locally in your browser using JavaScript — nothing you type is uploaded or stored on our servers.
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