Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Health
Ideal Weight Calculator
Estimates your ideal body weight in kilograms using four established clinical formulas — Hamwi, Devine, Robinson, and Miller — based on height and gender. Useful for setting realistic weight-loss or fitness goals.
Fill in the required fields to see your result.
Health
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
Key differences
| Ideal Weight Calculator | Sleep Schedule Calculator | |
|---|---|---|
| Category | Health | Health |
| Inputs required | 3 | 4 |
| Result | Ideal Body Weight (kg) | Recommended Bedtime |
| What it does | Estimates your ideal body weight in kilograms using four established clinical formulas — Hamwi, Devine, Robinson, and Miller — based on height and gender. Useful for setting realistic weight-loss or fitness goals. | 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. |