Calorie Calculator
Calculate your daily calorie needs
About the Calorie Calculator
The Calorie Calculator estimates how many calories your body burns at rest (BMR) and how many you need each day to maintain your weight, based on your activity level.
How it works
It uses the Mifflin–St Jeor equation, considered one of the most accurate for healthy adults: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5 for men, or − 161 for women. BMR is then multiplied by an activity factor from 1.2 (sedentary) to 1.9 (athlete) to get your daily needs.
How to Use Calorie Calculator
Enter Your Data
Enter your sex, age, weight and height.
Run the Tool
Choose your typical activity level.
Use the Result
Press Calculate to see your BMR and daily calorie needs.
Why Use Our Calorie Calculator?
100% Free
No registration, no hidden fees, no limits — ever.
Privacy First
All processing runs in your browser. Your data never leaves your device.
Mobile Friendly
Works perfectly on phones, tablets, and desktops.
Instant Results
Results appear as soon as you run the tool.
Frequently Asked Questions
Q. How many calories should I eat to lose weight?
A common guideline is about 500 calories below your maintenance number per day, which leads to roughly 0.5 kg (1 lb) of loss per week. Talk to a doctor or dietitian before starting a significant diet.
Q. Which activity level should I choose?
Sedentary means a desk job with little exercise. Moderate means exercise 3–5 days a week. Most people overestimate their activity, so if unsure, pick the lower level.
Q. Is this suitable for children or pregnant women?
No. The equation is designed for non-pregnant adults.