Estimate calories burned while sleeping based on your body weight and sleep time in hours, minutes, or decimal hours for total sleep duration.
- Jump Rope Calories Calculator
- Strength Training Calories Calculator
- Burpee Calorie Calculator
- Infrared Sauna Calories Calculator
- Push Up Calories Calculator
- Calories Burned Dancing Calculator
Watch the full calculation explainer.
Sleep Calorie Formula
Use this rough population estimate for adult sleep energy. The 2024 Adult Compendium assigns sleeping (07030) 1.0 MET, with 1 MET defined as 1 kcal/kg/hour. Individual metabolism varies.
For hours and minutes, convert time first: T = H + M / 60.
- C = calories burned sleeping
- BW = body weight in kilograms (pounds are converted using 1 lb = 0.45359237 kg)
- 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 | Estimated kcal per hour | Estimated kcal in 8 hours |
|---|---|---|
| 120 lb | 54.4 | 435.4 |
| 150 lb | 68.0 | 544.3 |
| 180 lb | 81.6 | 653.2 |
| 200 lb | 90.7 | 725.7 |
| 250 lb | 113.4 | 907.2 |
How to calculate calories burned while sleeping
Enter body weight in pounds or kilograms, then decimal sleep hours or hours and minutes. Blank hours or minutes means zero in the latter mode. Total duration must be positive and no more than 24 hours. Multiply weight in kilograms by total hours and 1.0 MET.
Example: for 200 lb and 8 hours, the model estimates 200 × 0.45359237 × 8 × 1.0 ≈ 725.7 kcal. This includes resting energy; it is not additional exercise energy or a personal prescription.
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.
