// FREE TOOL · FROM VIVE
Your metabolism, measured.
Find your basal metabolic rate — the calories your body burns at complete rest — using the Mifflin–St Jeor equation.
Enables the Katch–McArdle formula, more accurate for lean individuals.
BMR · MIFFLIN-ST JEOR
1,668 kcal
per day
HARRIS-BENEDICT (REVISED)
1,739 kcal
Usually 5–10% higher
AT REST, PER HOUR
69 kcal/hr
Daily calories by activity
Sedentary
Little or no exercise
2,001 kcal
Lightly active
1–3 days / week
2,293 kcal
Moderately active
3–5 days / week
2,585 kcal
Very active
6–7 days / week
2,876 kcal
Extra active
Hard exercise + physical job
3,168 kcal
// FAQ
Good to know
What is BMR, exactly?+
Your basal metabolic rate is the energy your body needs just to stay alive at rest — breathing, circulation, cell repair — before any movement or digestion is added.
Why do the two formulas disagree?+
Mifflin–St Jeor (1990) is the most validated against modern populations and is generally more accurate. Harris-Benedict (revised 1990) tends to run 5–10% higher — we show both so you can compare.
How do I use my BMR?+
Multiply it by an activity multiplier to get your TDEE — your true daily maintenance calories — using the table above or our TDEE calculator.
Ready to put this into action?
Take our 3-minute assessment and a licensed physician will confirm the right treatment for you.
Check eligibility →