Health

Calorie requirement calculator

Basal and total metabolic rate according to Mifflin-St-Jeor, with activity factor.

Updated on Apr 21, 2026 Calculator, calculation path and examples on one page

Back to category: Health

Calculator

Gender

Old

Weight in kg

Size in cm

Activity level

Reset Load example

Examples

Man, 32 years old, 78 kg, 178 cm.

Total requirements: 2,693 kcal

Load this example

Woman, 29 years old, 64 kg, 168 cm.

Total requirements: 1,903 kcal

Load this example

Man, 40 years old, 90 kg, 182 cm.

Total requirements: 3,178 kcal

Load this example

FAQ

What formula does the calculator use?

The initial version uses the Mifflin-St-Jeor formula as a standard.

What is the difference between basal metabolic rate and total requirement?

The basal metabolic rate describes the requirement at rest, the total requirement takes activity into account in everyday life.

Is the value exact?

No. It is a plausible estimate, not a laboratory determination.

Why does the activity factor play a big role?

Because energy consumption and lifestyle can vary greatly.

Can I use the calculator for diet or weight loss?

Yes, as a guide. The combination with the calorie deficit calculator is practical.

Related calculators

Derive target calories from total requirements and desired deficit.

Calculate BMI from weight and height.

Calculate percentage, percentage, base value and percent change.

Sources and notes