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Calorie Calculator

Estimate how many calories you burn each day and how much to eat to lose, keep or gain weight.

Free foreverNo sign-upPrivate: runs in your browserUpdated November 2026
years
cm
kg
Calories to maintain weight2,633 kcal

per day

BMR (at rest)1,699 kcal
To lose 0.5 kg / week2,133 kcal
To gain 0.5 kg / week3,133 kcal
Protein target120 g / day
● calculated in 0.10 msruns in your browserupdated 07:35:34
Visualise

Calories for each goal

Breakdown

Daily calories by goal

GoalCalories per dayNote
Lose 0.5 kg / week2,133 kcal—
Lose 0.25 kg / week2,383 kcal—
Maintain weight2,633 kcal—
Gain 0.25 kg / week2,883 kcal—
Gain 0.5 kg / week3,133 kcal—
The maths

Formula

This is the exact calculation the tool runs.

BMR = 10 × kg + 6.25 × cm − 5 × age + s
s+5 for men, −161 for women
TDEEBMR × activity level
0.5 kg / weekabout 500 kcal a day
Practice

Worked examples

Click "Try it" to load an example into the tool.

Active man, 30

Sex: MaleAge: 30 yearsHeight: 180 cmWeight: 80 kgActivity level: Moderate: 3–5 days a week
2,759 kcal

Woman, desk job

Sex: FemaleAge: 35 yearsHeight: 162 cmWeight: 65 kgActivity level: Little or no exercise
1,592 kcal

Student athlete

Sex: FemaleAge: 20 yearsHeight: 170 cmWeight: 60 kgActivity level: Hard: 6–7 days a week
2,418 kcal
Step by step

How to use the Calorie Calculator

Enter your details

Sex, age, height and weight change how much energy your body uses.

Pick your activity level

Be honest. Most people with desk jobs are "little" or "light".

Choose a goal

Use the table to see calories for losing, keeping or gaining weight.

Questions

Frequently asked questions

Which formula does this use?

The Mifflin-St Jeor equation, which studies show is among the most accurate for adults.

How fast should I lose weight?

About 0.25–0.5 kg (0.5–1 lb) per week is safe and easier to keep off.

What is BMR?

Basal metabolic rate: the calories your body burns at complete rest, just to stay alive.