For 1 hour gym calories burned, the answer stretches from about 257 kcal for steady weight training to 588 kcal for a hard circuit, for a 70 kg person. Most gym sessions mix lifting, rest between sets and some cardio, so a typical hour lands between 250 and 450 kcal.
Pick your workout type, body weight and minutes above. Its MET values come from a research catalogue of activities.
Quick numbers
Weight training, 70 kg, 1 hour
about 257 to 441 kcalCircuit training, 70 kg, 1 hour
about 588 kcalRowing machine, 70 kg, 30 min
about 257 kcalStretching, 70 kg, 30 min
about 85 kcalAfter-burn
small, about 5 to 10 percent extra
1 hour gym calories burned by workout
| Workout | MET | 60 kg | 70 kg | 85 kg |
|---|---|---|---|---|
| Weight training, moderate | 3.5 | 220 | 257 | 312 |
| Weight training, hard | 6.0 | 378 | 441 | 536 |
| Circuit training | 8.0 | 504 | 588 | 714 |
| Rowing machine, moderate | 7.0 | 441 | 514 | 625 |
| Elliptical, moderate | 5.0 | 315 | 368 | 446 |
| Stretching and mobility | 2.3 | 145 | 169 | 205 |
| Sit ups and crunches | 3.8 | 239 | 279 | 339 |
| Kettlebell swings | 9.8 | 617 | 720 | 875 |
Real sessions include rest. If you spend half the hour resting between heavy sets, the true burn is closer to the moderate line even if each set feels hard.
Strength training calories burned and why they still matter
Weight training burns fewer calories per hour than running, but it builds and keeps muscle. Muscle raises resting energy use a little and, more importantly, makes daily life easier and protects joints and bones as you age. For fat loss, combine two to four strength sessions a week with daily walking and a modest food deficit.
Bench press, deadlifts, rowing and kettlebells
Single lifts are hard to time because each set lasts under a minute. A session built around bench press or deadlifts, with sets and rest, burns roughly 193 to 331 kcal in 45 minutes for 70 kg. A rowing machine at a moderate effort burns about 172 kcal in 20 minutes. Kettlebell swings in work rest rounds are among the most demanding moves, around 120 kcal for 10 minutes of actual swinging.
A half-hour home circuit
A half hour of mixed exercise, such as a circuit of squats, push ups, lunges and planks, burns roughly 184 to 294 kcal for 70 kg. That makes 30 minutes a day a solid habit. See single moves on the squats, push ups and burpees pages.
Gym machines and fitness trackers
Treadmills, cross trainers and watches often overstate calories, sometimes by a third or more, because they do not know your fitness or they assume no rest. Use them to compare one session with another, not as exact numbers. The treadmill page explains the speed and incline maths.
Planning gym days around food
A typical hour of training adds 250 to 450 kcal to your day. If you are trying to lose weight, do not eat it all back; a protein-rich snack of 150 to 250 kcal after training is plenty. If you are building muscle, pair training with a surplus from the weight gain calorie tool and enough protein.
New to lifting? Learn form with light weights, warm up for 5 to 10 minutes and rest a day between hard sessions for the same muscles. People with heart disease or high blood pressure should check with a doctor before heavy lifting.
Compare with other activities
For running, cycling, swimming and sports, see the calorie burn calculator, which lists over twenty activities side by side.
Frequently asked questions
What does an hour in the gym burn?
For someone weighing 70 kg, about 257 to 588 kcal, with the mix of lifting, rest and cardio deciding where you land.
How many calories does weight training burn?
Roughly 257 kcal an hour at a moderate pace and 441 kcal at a hard pace for 70 kg.
What does a 30 minute circuit burn?
About 184 to 294 kcal for a mixed circuit at 70 kg.
Does lifting weights burn fat?
It burns some calories and builds muscle. Fat loss mainly comes from an overall calorie deficit.
How many calories does stretching burn?
About 72 to 103 kcal in 30 minutes.
Are gym machine calorie counts accurate?
Not very. They often read high. Use them for trends rather than exact figures.
Sources
- Compendium of Physical Activities