BMR (Mifflin–St Jeor)
Published in 1990, this is now the clinical and app standard. It tracks modern measurements better than Harris–Benedict and typically comes out about 5% lower.
Your numbers
BMR
1,605kcal
Calories per kg
22.9kcal
TDEE
2,207kcal
Formula
BMR = 10 × Weight (kg) + 6.25 × Height (cm) − 5 × Age + (5 × Sex (M1 / F0) − 161 × (1 − Sex (M1 / F0)))
BMR is what you burn lying still doing nothing. What you should actually eat only appears after multiplying by an activity factor.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Weight (kg) (kg)The second weight you are comparing against. | 70 | 1 and up |
| Height (cm) (cm)Height in centimetres; converted to metres inside the formula. | 172 | 50 and up |
| AgeAge in completed years — it shifts by one depending on the birthday. | 35 | 5 ~ 100 |
| Sex (M1 / F0)Where the formula splits by sex — enter 1 for male, 0 for female. | 1 | 0 ~ 1 |
Step by step
Quick reference table
Results when only Weight (kg) (kg) changes and everything else stays put.
| Weight (kg) (kg) | BMR (kcal) | Calories per kg (kcal) | TDEE (kcal) |
|---|---|---|---|
| 35 | 1,255 | 35.9 | 1,726 |
| 52.5 | 1,430 | 27.2 | 1,966 |
| 70 | 1,605 | 22.9 | 2,207 |
| 105 | 1,955 | 18.6 | 2,688 |
| 140 | 2,305 | 16.5 | 3,169 |
What each result means
| Result | At default values |
|---|---|
| BMR (kcal)The calories you burn in a day at complete rest. | 1,605 |
| Calories per kg (kcal)Calories burned per kilogram — how briskly your metabolism runs. | 22.9 |
| TDEE (kcal)Daily calories burned once activity is included. | 2,207 |
Common mistakes
BMR is what you burn lying still doing nothing. What you should actually eat only appears after multiplying by an activity factor.
Glossary
- Weight (kg)
- The second weight you are comparing against.
- Height (cm)
- Height in centimetres; converted to metres inside the formula.
- Age
- Age in completed years — it shifts by one depending on the birthday.
- Sex (M1 / F0)
- Where the formula splits by sex — enter 1 for male, 0 for female.
- BMR
- The calories you burn in a day at complete rest.
- Calories per kg
- Calories burned per kilogram — how briskly your metabolism runs.
- TDEE
- Daily calories burned once activity is included.
Frequently asked questions
Q. How is BMR (Mifflin–St Jeor) calculated?
BMR = 10 × Weight (kg) + 6.25 × Height (cm) − 5 × Age + (5 × Sex (M1 / F0) − 161 × (1 − Sex (M1 / F0))) — Published in 1990, this is now the clinical and app standard. It tracks modern measurements better than Harris–Benedict and typically comes out about 5% lower.
Q. Can you walk through an example?
With Weight (kg) 70kg, Height (cm) 172cm, Age 35, Sex (M1 / F0) 1, the answer is BMR 1,605kcal.
Q. What do I need to enter?
Enter Weight (kg), Height (cm), Age, Sex (M1 / F0). The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Weight (kg) (kg) moves the answer to Weight (kg) (kg) 35 → BMR (kcal) 1,255 and Weight (kg) (kg) 140 → BMR (kcal) 2,305. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
BMR is what you burn lying still doing nothing. What you should actually eat only appears after multiplying by an activity factor.
Related calculators
These calculators help you understand health figures; they do not replace diagnosis or prescription. See a clinician if you have symptoms.