SnapCalorieBurn — free MET-based calorie calculators
How many calories do you burn sleeping 6 hours? Approximately 280–500 kcal. Weight-based table and sleep metabolism facts.
Six hours of sleep burns approximately 280–500 calories as your body maintains essential functions like breathing, circulation, and cellular repair.
While six hours is below the recommended 7–9 hours for most adults, many people regularly sleep this amount due to busy schedules.
Sleeping 6 hours burns fewer calories than 8 hours of sleep simply due to less time. However, the metabolic difference is small — about 90–170 fewer calories. The hormonal disruption from inadequate sleep often causes people to eat 200–400 more calories the following day, more than offsetting any "savings" from less sleep.
If you regularly sleep only 6 hours, the calorie burn during sleep isn't the concern — it's the downstream effects on appetite and metabolism. Prioritizing 7–8 hours of sleep can paradoxically help weight management better than the extra 1–2 waking hours would.
Direct answer: 6 hours of sleeping burns an estimated 336–593 calories, depending on body weight (180 lb / 82 kg: ~467 kcal). Intensity assumed: Asleep (MET 0.95). This is an estimate, not a measurement.
| Body weight | Calories burned |
|---|---|
| 130 lb (59 kg) | ~336 cal |
| 155 lb (70 kg) | ~399 cal |
| 180 lb (82 kg) | ~467 cal |
| 205 lb (93 kg) | ~530 cal |
| 230 lb (104 kg) | ~593 cal |
Example: At MET 0.95, a 180 lb (82 kg) person doing 6 hours of sleeping burns approximately 467 calories: 0.95 × 82 × 6.00 h ≈ 467 kcal.
An estimated 336–593 calories, depending on body weight. A 180 lb (82 kg) person burns about 467 kcal, calculated as MET 0.95 × 82 kg × 6.00 hours.
About 1.3 kcal per minute for a 180 lb (82 kg) person, or 5.7 kcal per kilogram of body weight across the whole session.
Because the MET formula scales directly with body mass: a 130 lb person burns about 336 kcal here versus 593 kcal for a 230 lb person — a 76% spread for the identical session.
From the 2024 Adult Compendium of Physical Activities, the reference database of measured MET intensities for physical activities. Every figure on this page uses that value in the formula Calories = MET × body weight (kg) × duration (hours).
They are estimates from population averages, not measurements. Individual results commonly land within about ±15% of the figure shown; actual intensity and pace, body composition and fitness, terrain and technique all shift the real number. The values are gross calories, so they include the energy you would have burned at rest.
Open the sleeping calorie calculator to enter your own weight, intensity and duration.