SnapCalorieBurn — free MET-based calorie calculators
20 minutes of HIIT burns 148–260 calories plus afterburn effect. Weight table and optimal HIIT workout structure.
Twenty minutes of HIIT burns approximately 148–260 calories during the session.
Twenty minutes is the most-studied HIIT duration in exercise science research. The landmark Tabata study and numerous subsequent trials used 15–20 minute protocols to demonstrate HIIT's superior cardiovascular and metabolic benefits compared to longer steady-state exercise. At this duration, you complete enough high-intensity intervals to trigger meaningful metabolic adaptations without the excessive fatigue that can come from longer HIIT sessions.
It exceeds 20 minutes of any steady-state cardio activity.
The 20-minute HIIT protocol is arguably the most time-efficient exercise format available. Try the classic structure: 5 exercises, 40 seconds work, 20 seconds rest, repeated 4 rounds. Total time including warm-up and cooldown: about 25 minutes. Three sessions per week provide 445–780+ calories of high-quality exercise.
Direct answer: 20 minutes of HIIT burns an estimated 177–312 calories, depending on body weight (180 lb / 82 kg: ~246 kcal). Intensity assumed: Typical HIIT session including rest intervals (MET 9). This is an estimate, not a measurement.
| Body weight | Calories burned |
|---|---|
| 130 lb (59 kg) | ~177 cal |
| 155 lb (70 kg) | ~210 cal |
| 180 lb (82 kg) | ~246 cal |
| 205 lb (93 kg) | ~279 cal |
| 230 lb (104 kg) | ~312 cal |
Example: At MET 9, a 180 lb (82 kg) person doing 20 minutes of HIIT burns approximately 246 calories: 9 × 82 × 0.33 h ≈ 246 kcal.
An estimated 177–312 calories, depending on body weight. A 180 lb (82 kg) person burns about 246 kcal, calculated as MET 9 × 82 kg × 0.33 hours.
About 12.3 kcal per minute for a 180 lb (82 kg) person, or 3.0 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 177 kcal here versus 312 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 hiit calorie calculator to enter your own weight, intensity and duration.