How to use the Daily Calorie Needs calculator
- Choose your sex and enter your age, weight and height.
- Choose how active you are.
- Read the calories your body uses in a day and your resting calories (BMR).
How it's calculated
Show the formula
BMR (Mifflin–St Jeor) = 10 × kg + 6.25 × cm − 5 × age + 5 (men) or − 161 (women)
Daily calories = BMR × activity factor
Daily calories = BMR × activity factor
Uses the Mifflin–St Jeor formula. It is an estimate; a doctor or dietitian can give advice for your needs.
Worked example
These are the example numbers the calculator opens with. Change any of them above to see your own result.
You enter
| Sex | Male |
|---|---|
| Age | 28 |
| Weight | 72 kg |
| Height | 5 ft |
| Height | 8 in |
| Activity | Light (1–3 days/week) |
You get
| Calories to maintain weight | 2,289 kcal/day |
|---|---|
| Resting calories (BMR) | 1,665 kcal |
Tips
- This is an estimate; real needs vary from person to person.
- For any diet change, especially with a health condition, speak to a doctor or dietitian.
Frequently asked questions
What is BMR?
Basal metabolic rate: the calories your body uses at complete rest to keep you alive.
Which activity level should I pick?
Choose the one that matches a normal week. Most office workers are 'little or no exercise' or 'light'.