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BMR Calculator

Estimate basal metabolic rate with Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle and map it to activity levels.

Your details

Enter your measurements to estimate basal metabolic rate.

Optional — enables Katch-McArdle formula

Your estimated BMR

1,649kcal/day

Using Mifflin-St Jeor

TDEE · Moderately active

2,556 kcal/day

Formula comparison

Compare BMR across all available equations

TDEE by activity level

Tap a bar or pill to set your activity level

Energy breakdown

BMR vs calories from daily activity

  • Basal (BMR)

    1,649 kcal (65%)

  • Activity

    907 kcal (35%)

  • Total TDEE: 2,556 kcal

Estimate only — not medical advice

BMR and TDEE results are formula-based estimates. Individual metabolism varies. Consult a healthcare professional before making dietary changes.

BMR1,649kcal
TDEE · Moderately active2,556 kcal

Mifflin-St Jeor

MSJH-B

How it works

Enter your inputs in the form. Results update as you change values.

Use the share button when available to copy a link with your current inputs so you can revisit or send the same scenario.

Frequently asked questions

Are these results official advice?
No. Calcuit tools provide estimates for education and planning. Confirm important decisions with a qualified professional.

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