Calorie Calculator

A calorie calculator estimates how many calories a person may need each day based on factors such as age, sex, height, weight and physical activity.

This calculator uses the Mifflin-St Jeor equation to estimate Basal Metabolic Rate (BMR), then applies an activity multiplier to estimate daily calorie needs.

Fashnza's Calorie Calculator provides a convenient estimate for general informational purposes.

BMR: Basal Metabolic Rate is an estimate of the energy your body needs to perform basic functions while at rest.

Daily Calorie Needs: This estimate adjusts your BMR according to the activity level you select.

Your actual calorie requirements can vary because of many individual factors. Use this result as an estimate rather than a medical or nutritional diagnosis.

What does a calorie calculator do?

It estimates your daily calorie requirements using information such as age, sex, height, weight and activity level.

Which formula does this calculator use?

This calculator uses the Mifflin-St Jeor equation to estimate BMR and then applies an activity multiplier.

Is the Calorie Calculator free?

Yes. Fashnza's Calorie Calculator is free to use.

What is BMR?

BMR stands for Basal Metabolic Rate. It represents an estimate of the calories your body uses for basic physiological functions at rest.

Does activity level affect the result?

Yes. A higher activity level produces a higher estimated daily calorie requirement.

Does Fashnza store my information?

No account is required. Your calculation is performed directly in your browser.

Are the results medical advice?

No. The results are estimates for general informational purposes and should not be treated as medical or professional nutritional advice.