Calorie Calculator

How to use

1. Choose Sex, Male or Female, then enter Age, Weight (kg), and Height (cm).
2. Set Activity to Sedentary, Light (1–3 days/wk), Moderate (3–5 days/wk), Active (6–7 days/wk), or Very active. Those options use the factors 1.2, 1.375, 1.55, 1.725, and 1.9.
3. Click Calculate Calories. The main result is TDEE in kcal per day. The detail line shows BMR, a mild deficit of 500 kcal under that TDEE, and a mild surplus of 300 kcal over it.

When it helps

Use the large number when you want one maintenance figure before you decide to eat a little under or over it. The 500 and 300 lines are arithmetic around the TDEE, not a menu. If you only want the resting piece, the BMR calculator uses the same Mifflin-St Jeor equation and prints example multipliers instead of asking for activity.

Open the BMI calculator when the question is a weight-for-height category rather than calories. This page never reads a food log, and the BMI page never returns kcal.

Limits

Read the kcal total as an estimate rather than a diagnosis of what you should eat. Male BMR is 10 times kilograms, plus 6.25 times centimeters, minus 5 times age, plus 5. Female BMR uses those same terms with minus 161 instead of plus 5. TDEE is that BMR times the selected activity factor.

The form does not ask about body fat, pregnancy, illness, or steps, and it does not plan meals. The mild deficit and mild surplus are fixed offsets of 500 and 300, not a prescription. If age, weight, or height is missing, the result says Enter all values.