Pilates sits near the bottom of any calorie table, and it still earns its place in a week. This calculator shows both halves of that. Pick one of 37 activities, from a traditional mat class to fast skipping, and add your weight and minutes.
The formula behind every number
Every result comes from one line: calories a minute = MET × 3.5 × body mass in kg ÷ 200. This is the standard conversion used by the American College of Sports Medicine, with 1 MET (sitting at rest) taken as 3.5 mL of oxygen per kg per minute. The MET values come from the 2024 Adult Compendium of Physical Activities, which has no separate reformer value, so the tool uses Pilates, general (2.8 METs) for studio, reformer and mixed classes and Pilates, traditional mat (1.8 METs) for a classic mat session.
From that the tool reports:
- Calories: the per-minute figure times your minutes. This is gross, including resting energy.
- Above resting: the same sum with (MET minus 1), the cost of the activity alone.
- Intensity: under 3 METs light, 3 to 5.9 moderate, 6 and above vigorous.
- Guideline minutes (the ring): moderate minutes count once and vigorous minutes twice towards 150 a week. Light minutes do not count.
Worked examples at 140 lb (63.5 kg)
A 50-minute general Pilates class:
- Per minute: 2.8 × 3.5 × 63.5 ÷ 200 = 3.11 calories.
- Total: 3.11 × 50 = about 156 calories.
- Above resting: (2.8 minus 1) × 3.5 × 63.5 ÷ 200 × 50 = about 100. The other 56 would have been used sitting still.
- Intensity: light, because 2.8 is under 3, so the ring stays empty.
A traditional mat class of the same length costs 1.8 × 3.5 × 63.5 ÷ 200 = 2.00 a minute, about 100 calories. Thirty minutes of running at 6 mph (9.7 km/h) works out at 9.3 × 3.5 × 63.5 ÷ 200 = 10.33 a minute, and 10.33 × 30 = about 310 calories. That is vigorous, so the half hour counts as 60 of the 150 guideline minutes. The run is 20 minutes shorter than the Pilates class and uses about twice the energy.
Why Pilates scores low, and why that is fine
MET values track whole-body oxygen use. Running carries your full weight down the road with every stride. A Pilates class has a different shape: much of it happens lying or seated, repetitions are slow and few, and there are pauses to change springs or set up the next exercise. Published measurements of its energy cost vary widely with the exercises and pace, from under 2 METs to much higher figures for advanced, fast sessions. A circuit-style reformer class that moves briskly between exercises will likely burn more than the 2.8 MET estimate.
None of this makes Pilates a weak workout. The guidelines ask for two things: aerobic minutes, and muscle-strengthening activity on at least two days a week. Pilates loads the trunk, hips, legs and shoulders against body weight, springs or a band. That is muscle-strengthening work, and calories are the wrong yardstick for it. The piece on metabolic health and strength training looks at where that kind of work fits.
Calories in 30 minutes at 155 lb (70.3 kg)
At 70.3 kg each MET is worth 3.5 × 70.3 ÷ 200 = 1.23025 calories a minute, so 30 minutes comes to MET × 36.9075. The table shows that product to one decimal place, then rounded to the nearest calorie.
| Activity | METs | MET × 36.9075 | Calories |
|---|---|---|---|
| Hatha yoga | 2.3 | 84.9 | 85 |
| Pilates, general class | 2.8 | 103.3 | 103 |
| Walking, brisk, 3.5 to 3.9 mph (5.6 to 6.3 km/h) | 4.8 | 177.2 | 177 |
| Rowing machine, 100 to 149 W | 7.5 | 276.8 | 277 |
| Cycling, 12 to 13.9 mph (19 to 22 km/h) | 8.0 | 295.3 | 295 |
| Swimming, crawl at a medium pace | 8.0 | 295.3 | 295 |
| Running, 6 mph (9.7 km/h) | 9.3 | 343.2 | 343 |
| Jump rope, moderate | 11.8 | 435.5 | 436 |
Fitting the numbers into a week
The ring tells you more than the calorie total: it shows how a week adds up against 150 moderate minutes. For the 140 lb example:
- Two Pilates classes for the muscle-strengthening days: no ring minutes, as they are light.
- Three 30-minute brisk walks: 90 minutes.
- One 30-minute run at 6 mph: 30 minutes counted double, so 60.
- Total: 150.
If you count your walking in steps, the steps to calories calculator converts them. The Pilates weekly plan suggests how many sessions to fit around other training. Treat the calories as a rough guide to energy used, not a prediction of weight change.
Sources
- 2024 Adult Compendium of Physical Activities. Herrmann SD and colleagues, Journal of Sport and Health Science, 2024. pacompendium.com
- American College of Sports Medicine: the standard conversion from METs to calories.
- Physical Activity Guidelines for Americans, 2nd edition, 2018.
- UK Chief Medical Officers' Physical Activity Guidelines, 2019.
Questions readers ask
How many calories does Pilates burn?
At 140 lb (63.5 kg), about 156 calories in a 50-minute general or reformer class and about 100 in a traditional mat class of the same length. At 155 lb (70.3 kg), 30 minutes of a general class comes to about 103. Heavier people burn proportionally more.
How many calories does a reformer class burn?
The Compendium has no reformer value, so the tool uses Pilates, general at 2.8 METs. A fast, circuit-style reformer class will likely burn more than that estimate, while a slow, technical class with frequent spring changes may sit closer to it.
Which burns more: running, cycling or swimming?
Pace matters more than the sport. At 155 lb, 30 minutes of running at 6 mph is about 343 calories, while cycling at 12 to 13.9 mph and a medium-pace crawl come to about 295 each. Leisurely cycling under 10 mph, at 4.0 METs, costs less than brisk walking.
How many calories does a rowing machine or jump rope burn?
At 155 lb, 30 minutes of rowing at 100 to 149 watts is about 277 calories, and 30 minutes of moderate skipping about 436. If you skip in rounds, enter only the minutes you actually jumped.