What Is the Calorie Calculator?
The Calorie Calculator is a free tool that estimates how many calories your body burns each day, and how many you should eat depending on your goal — maintaining, losing, or gaining weight. It's based on your gender, age, height, weight, and activity level.
Behind the scenes, the calculator uses the Mifflin-St Jeor equation to work out your Basal Metabolic Rate (BMR) — the calories your body needs at complete rest — and then multiplies that by an activity factor to estimate your Total Daily Energy Expenditure (TDEE).
Whether you're planning a diet, tracking macros, or just curious about your daily calorie needs, this tool gives you a solid, personalized starting point in a few seconds.
How to Use the Calorie Calculator?
Getting your numbers takes less than a minute:
- Select your gender — this affects the BMR formula.
- Enter your age in years.
- Enter your height, in centimeters or feet and inches.
- Enter your weight, in kilograms or pounds.
- Choose your activity level, from sedentary to very active.
- Click Calculate My Calories to see your BMR, maintenance calories, and targets for weight loss or gain.
Why Use Our Calorie Calculator?
- Science-based: Uses the Mifflin-St Jeor equation, widely regarded as one of the most accurate BMR formulas.
- Multiple targets: See maintenance calories plus mild and standard targets for weight loss and gain.
- Flexible units: Enter your height and weight in metric or imperial units.
- Instant: Get your results the moment you hit calculate — no waiting, no email required.
- Free to use: No sign-up, no limits, no hidden costs.
Is the Calorie Calculator Free?
Yes. The Calorie Calculator is completely free to use, with no account, no download limits, and no premium version. Calculate your numbers as many times as you like — for yourself or anyone else.
Frequently Asked Questions
What formula does this calculator use?
It uses the Mifflin-St Jeor equation to calculate BMR, then applies an activity multiplier to estimate your total daily calorie needs (TDEE).
What's the difference between BMR and TDEE?
BMR is the calories your body burns at complete rest. TDEE adds your activity level on top of that, giving a more realistic daily calorie estimate.
How many calories should I eat to lose weight?
A common approach is eating below your maintenance calories — the calculator shows both a mild and a standard deficit so you can choose a pace that fits you.
Is this calculator accurate for everyone?
It gives a solid estimate for most people, but individual metabolism varies. Use it as a starting point and adjust based on how your weight changes over a few weeks.
Can I use pounds and feet instead of kg and cm?
Yes. Use the unit toggles next to the height and weight fields to switch between metric and imperial units.
Does this calculator store my personal information?
No. All calculations happen instantly in your browser — nothing you enter is saved or sent anywhere.
Should I follow this instead of talking to a doctor or dietitian?
This tool gives a general estimate for informational purposes only. For personalized medical or nutrition advice, it's best to consult a doctor or registered dietitian.