Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

BMI Calculator

Calculate Body Mass Index (BMI) — body weight in kg divided by height in metres squared — to screen for under/overweight categories. The most widely used population-level fitness and health risk metric, with known limitations for athletes and unusual body compositions.

Weight (kg)

Height (cm)

Fitness

Daily Calorie Needs Calculator

Estimate total daily calorie needs (TDEE) by combining the revised Harris-Benedict BMR formula with an activity multiplier. The number to eat at for maintenance, subtract from for fat loss, or add to for muscle gain.

Weight (kg)

Height (cm)

Age (years)

Activity Level

Key differences

	BMI Calculator	Daily Calorie Needs Calculator
Category	Fitness	Fitness
Inputs required	2	4
Result	Your BMI	Daily Calories Needed (kcal)
What it does	Calculate Body Mass Index (BMI) — body weight in kg divided by height in metres squared — to screen for under/overweight categories. The most widely used population-level fitness and health risk metric, with known limitations for athletes and unusual body compositions.	Estimate total daily calorie needs (TDEE) by combining the revised Harris-Benedict BMR formula with an activity multiplier. The number to eat at for maintenance, subtract from for fat loss, or add to for muscle gain.