Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Daily Water Intake Calculator
Estimate daily water intake in millilitres from body weight, exercise duration and intensity, climate, and special health factors. Combines a baseline of ~35 ml/kg with adjustments for exercise sweat loss and environmental or physiological stress.
BMR / TDEE Calculator
Estimate your daily calorie needs using the revised Harris-Benedict equation, then adjust for activity to get your Total Daily Energy Expenditure (TDEE) — the rough number of calories you burn in 24 hours when you eat a maintenance diet. Enter your weight in kilograms, height in centimetres, age, biological sex, and an activity multiplier (sedentary 1.2, lightly active 1.375, moderately active 1.55, very active 1.725, extremely active 1.9). The result is what most nutrition guides call your "maintenance calories" — a starting point for designing a deficit (to lose weight), a surplus (to gain muscle), or a recomposition plan.
Key differences
| Daily Water Intake Calculator | BMR / TDEE Calculator | |
|---|---|---|
| Category | Nutrition | Health |
| Inputs required | 5 | 5 |
| Result | Daily Water Intake (ml) | Daily Calorie Needs (calories) |
| What it does | Estimate daily water intake in millilitres from body weight, exercise duration and intensity, climate, and special health factors. Combines a baseline of ~35 ml/kg with adjustments for exercise sweat loss and environmental or physiological stress. | Estimate your daily calorie needs using the revised Harris-Benedict equation, then adjust for activity to get your Total Daily Energy Expenditure (TDEE) — the rough number of calories you burn in 24 hours when you eat a maintenance diet. Enter your weight in kilograms, height in centimetres, age, biological sex, and an activity multiplier (sedentary 1.2, lightly active 1.375, moderately active 1.55, very active 1.725, extremely active 1.9). The result is what most nutrition guides call your "maintenance calories" — a starting point for designing a deficit (to lose weight), a surplus (to gain muscle), or a recomposition plan. |