Health & Fitness
Katch–McArdle (Cunningham) Resting Energy Calculator
Estimate basal metabolic rate from lean body mass using the Katch-McArdle equation.
Preparing your result…
What this calculator does
Calculates BMR Katch-McArdle Calculator using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Fat-free mass = weight × (1 − body fat % ÷ 100); REE (kcal/day) ≈ 370 + 21.6 × FFM (Cunningham 1991)
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Fat-free mass estimate=body kg×(1−body-fat percent/100). REE kcal/day≈370+21.6×FFM kg. This coefficient set is directly described by Cunningham’s 1991 prediction equation and is often labeled Katch–McArdle in calculators.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Correct source attribution and label resting-energy estimate. Body-fat estimation error passes directly into energy estimation. It is not measured BMR or TDEE; do not add an activity multiplier without identifying the next model.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Weight (kg) | Body fat (%) | Estimated resting energy (REE) |
|---|---|---|---|
| Worked example | 75 | 20% | 1,666 kcal/day |
| Half the amounts | 37.5 | 10% | 1,099 kcal/day |
| Double the amounts | 150 | 40% | 2,314 kcal/day |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
Report a mistake or request an improvement
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
Related calculators
BMR Cunningham Athlete Calculator
Estimate resting metabolic expenditure for athletes with the Cunningham lean-mass equation.
BMR Calculator (Mifflin–St Jeor Resting Energy)
Estimate basal metabolic rate using the Mifflin–St Jeor equation.
Calorie Needs (TDEE)
Estimate daily calorie needs from BMR and activity level.
Macro Split Calculator
Split a daily calorie target into protein, carbohydrate and fat goals.
Reverse Dieting Calculator
Plan weekly calorie increases back to maintenance after a diet or contest prep.
Thermic Effect of Food Calculator
Estimate calories burned digesting protein, carbohydrate and fat across the day.
Namaste! Did this Katch–McArdle (Cunningham) Resting Energy Calculator help you?
Aapka ek click humein behtar banata hai. Just tap a star, no sign-in, no typing.