Rex says
Same equations the textbooks use — just way less awkward. Pop in your stats and I'll tell you what the number actually means for you.
Try a scenario
Click to load — tweak from there.Inputs
Result
BMR
1,706
calories/day at complete rest
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter units.
- 2Enter sex.
- 3Enter age (years).
- 4Enter weight.
- 5Enter height.
- 6Read your bmr on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
Mifflin-St Jeor equation, the most accurate BMR formula for most adults.
FormulaMifflin-St Jeor: 10·kg + 6.25·cm − 5·age + s (s=+5 male, −161 female).