Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
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.
Fitness
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.
Key differences
| Daily Calorie Needs Calculator | BMI Calculator | |
|---|---|---|
| Category | Fitness | Fitness |
| Inputs required | 4 | 2 |
| Result | Daily Calories Needed (kcal) | Your BMI |
| What it does | 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. | 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. |