Estimate calories burned during Ashtanga yoga based on body weight, class length, and practice intensity, or compare other yoga styles.
Calories Burned Ashtanga Yoga Formula
The calculator uses the standard MET (metabolic equivalent of task) energy expenditure equation.
Calories = MET * 3.5 * weight_kg / 200 * minutes
This simplifies to:
Calories = weight_kg * MET * 0.0175 * minutes
- Calories – energy burned in kcal
- weight_kg – body weight in kilograms (lb is divided by 2.20462, stone is multiplied by 6.35029)
- MET – metabolic equivalent for the activity
- minutes – session length in minutes (hours are multiplied by 60)
The MET value defaults to 4.0 for traditional Ashtanga, 3.0 for a light or modified practice, and 5.0 for a vigorous full primary series. These values come from the Compendium of Physical Activities. The result is an estimate. Real burn varies with fitness level, room temperature, breath control (ujjayi and bandhas raise effort), and how long you hold each posture.
The Ashtanga tab applies the formula with the MET you select. The Compare styles tab runs the same formula across other yoga styles so you can see how Ashtanga stacks up against Yin, Hatha, Vinyasa, Bikram, and Hot Yoga at your weight and time.
Reference Tables
MET values used in the calculator:
| Yoga Style | MET | Intensity |
|---|---|---|
| Restorative | 2.0 | Light |
| Iyengar | 2.3 | Light |
| Yin | 2.5 | Light |
| Hatha | 3.0 | Moderate |
| Kundalini | 3.0 | Moderate |
| Ashtanga | 4.0 | Moderate |
| Power | 4.2 | Moderate |
| Bikram | 5.0 | Moderate |
| Vinyasa | 5.5 | Moderate |
| Hot Yoga | 6.0 | Vigorous |
Estimated calories burned in a 90 minute traditional Ashtanga class (MET 4.0):
| Body Weight | 60 min | 75 min | 90 min |
|---|---|---|---|
| 120 lb (54 kg) | 227 | 284 | 340 |
| 150 lb (68 kg) | 286 | 357 | 429 |
| 180 lb (82 kg) | 344 | 430 | 516 |
| 200 lb (91 kg) | 382 | 478 | 573 |
| 230 lb (104 kg) | 437 | 546 | 655 |
Worked Example and FAQ
Example. A 160 lb practitioner does a 75 minute traditional Ashtanga class.
- Convert weight: 160 / 2.20462 = 72.6 kg
- Apply formula: 72.6 * 4.0 * 0.0175 * 75
- Result: about 381 kcal
Why is Ashtanga rated MET 4.0 when it feels harder than that? The 4.0 figure is an average across a full class, including held postures, seated forward folds, and savasana. The vinyasa transitions push much higher, but the time-weighted average lands in the moderate range. Pick the vigorous option (MET 5.0) if you do the full primary series without modifications.
Does Mysore style burn more than led class? Roughly the same per minute if you keep moving. Mysore practitioners often work longer because they go at their own pace through the full series, so total calories tend to be higher.
Why does Hot Yoga show a higher burn than Ashtanga? Heat raises heart rate and sweat loss, which pushes the MET to 6.0. Sweat loss is water weight, not fat, but the cardiovascular load is real.
Can I trust this number for weight loss tracking? Use it as a ballpark. MET equations can be off by 20 to 30 percent for any individual. A heart rate monitor with a chest strap gives a closer estimate for your specific physiology.
Does breath work change the burn? Ujjayi breathing and bandha engagement increase oxygen demand and core muscle activation. They are part of why Ashtanga rates higher than Hatha at the same posture pace.
