Most “calorie burn” pages online bury the formula they’re using, or worse, still lean on a metabolism equation from before World War II. Our BMR calculator does neither.
What’s different:
- Named formula — we use the Mifflin-St Jeor equation (1990), the version validation studies have generally found more accurate than the older Harris-Benedict formula, and we say so on the page.
- Instant — enter your sex, age, weight, and height and the result updates as you type, in metric or imperial, no submit button.
- Shareable — your inputs live in the link, so you can send a pre-filled result to a coach, a friend, or your future self.
- Honest about limits — BMR from height and weight alone can’t see your body composition, and we say that plainly instead of implying clinical precision. This is a general estimate, not medical advice.
Once you have your BMR, the natural next question is what you actually need in a day with activity added — that’s the daily calorie calculator, built on the same formula. The BMR tool is also embeddable on your own site with one iframe.