How calories are estimated

We use the Mifflin–St Jeor equation, which is widely considered the most accurate method for estimating Basal Metabolic Rate (BMR):

Men: BMR = 10 × kg + 6.25 × cm − 5 × age + 5
Women: BMR = 10 × kg + 6.25 × cm − 5 × age − 161

Total Daily Energy Expenditure (TDEE) = BMR × activity multiplier. To lose ~1 lb (0.5 kg) per week, it is recommended to eat a deficit of ~500 kcal from your TDEE; to gain, eat a surplus of ~500 kcal. These are estimates — individual needs vary based on metabolism, muscle mass, and exact activity intensity.

Frequently Asked Questions

Is the Calorie Calculator free to use?

Yes, the Calorie Calculator is 100% free to use. There are no subscriptions, no sign-ups, and no hidden fees.

Is my data safe when using the Calorie Calculator?

Absolutely. All calculations performed by the Calorie Calculator happen locally in your web browser. We do not store, track, or transmit your inputs or results to any server.

How accurate is the Calorie Calculator?

Our Calorie Calculator uses industry-standard formulas and methodology. You can view the exact formula and calculation logic used in the methodology section above to verify the math yourself.

Can I use the Calorie Calculator on my mobile phone?

Yes! The Calorie Calculator is fully responsive and works seamlessly on all devices including smartphones, tablets, and desktop computers.