Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Sleep Schedule Calculator
Find a bedtime that lets you wake up at the end of a complete 90-minute sleep cycle, minimising the groggy, disoriented feeling (sleep inertia) of being yanked out of deep sleep by an alarm. Enter your desired wake time and how many full cycles you want, and the calculator backs out the bedtime.
Recommended Bedtime
22:30 PM
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
| Sleep Schedule Calculator | BMR / TDEE Calculator | |
|---|---|---|
| Category | Health | Health |
| Inputs required | 4 | 5 |
| Result | Recommended Bedtime | Daily Calorie Needs (calories) |
| What it does | Find a bedtime that lets you wake up at the end of a complete 90-minute sleep cycle, minimising the groggy, disoriented feeling (sleep inertia) of being yanked out of deep sleep by an alarm. Enter your desired wake time and how many full cycles you want, and the calculator backs out the bedtime. | 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. |