Enter your body weight and sleep time to calculate your calories burned while sleeping. Most adults burn about 40 to 90 calories per hour of sleep, with larger bodies generally burning more.
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Sleep Calorie Formula
Use the following formula to calculate calories burned while sleeping.
C = BW * T * 0.4287
For the advanced version, convert time first: T = H + M / 60.
- C = calories burned sleeping
- BW = body weight in pounds
- T = total sleep time in hours
- H = hours slept
- M = minutes slept
Calories burned per hour sleeping
Your body keeps using energy during sleep for breathing, circulation, temperature control, and brain activity. In this calculator, body weight is the main driver of hourly calorie burn.
| Body Weight | Calories Burned Per Hour | Calories Burned in 8 Hours |
|---|---|---|
| 120 lb | 51.4 | 411.6 |
| 150 lb | 64.3 | 514.4 |
| 180 lb | 77.2 | 617.3 |
| 200 lb | 85.7 | 685.9 |
| 250 lb | 107.2 | 857.4 |
How to calculate calories burned while sleeping
First, enter your body weight in pounds. Next, enter your total sleep time in hours, or switch to Advanced and enter hours and minutes separately. Then multiply body weight by total sleep hours and by 0.4287.
Example: a 200 lb person who sleeps for 8 hours burns 200 × 8 × 0.4287 = 685.9 calories.
What affects calories burned during sleep?
Body size has the biggest impact in this calculator because larger bodies generally use more energy at rest. Sleep duration also matters because longer sleep means more time spent supporting the heart, lungs, brain, and overnight recovery.
