Calories Burned Weight Lifting Calculator
Result
Calories burned
- Calories per hour
- 257 kcal
- Calories per minute
- 4.3 kcal
- Energy
- 1,076 kJ
How many calories does a weights session burn? Fewer than most gym-goers expect: a 70 kg person training for an hour at a general pace comes out at 257 kcal, about the same as a brisk walk. This calories burned weight lifting calculator takes your body weight, the minutes you were in the gym, and one of six lifting styles, and returns kcal, the hourly rate and kilojoules. The figure is low because the MET values count the whole session — including the rest between sets, already inside the 3.5 MET of general weight training.
Calories burned per hour by lifting style
| Style | What it means | MET | kcal per hour at 70 kg |
|---|---|---|---|
| Light calisthenics (crunches, planks) | Light, no load | 2.8 | 206 |
| General weight training, 8 – 15 reps with rest between sets | 8 – 15 reps, with rest | 3.5 | 257 |
| Squats and deadlifts, slow or explosive | Heavy, slow or explosive | 5 | 368 |
| Powerlifting or bodybuilding, vigorous | Vigorous effort | 6 | 441 |
| Circuit training with kettlebells, minimal rest | Minimal rest | 7.5 | 551 |
| Vigorous calisthenics (push-ups, burpees) | Vigorous, no load | 7.5 | 551 |
The calorie column is for a 70 kg lifter and scales in a straight line with body weight: at 85 kg every figure is 21% higher, at 55 kg 21% lower. MET values are population averages from the 2024 Adult Compendium of Physical Activities and are the same list the drop-down uses. Two rows share 7.5 — circuit training and vigorous calisthenics are different activities that happen to have the same value, so neither is a typo.
Formula
kcal = MET × 3.5 × body weight (kg) ÷ 200 × minutes
- MET
- Metabolic equivalent of the lifting style you picked
- w
- Body weight in kilograms
- t
- Time in the gym, in minutes
Use it to put a number on a session you have already done, or to see how much of the difference between two programmes comes from the style rather than the clock. It answers "what did that cost me", not "am I training hard enough" — for the second question you want the loads on the bar. Pair it with the daily energy page if what you actually want is the food side of the equation.
Worked examples
A 70 kg lifter, one hour of general weight training
- Per minute: 3.5 × 3.5 × 70 ÷ 200 = 4.3 kcal
- Over the hour: 4.3 × 60 = 257 kcal
- In kilojoules: 257.25 × 4.184 = 1,076 kJ
The rest between sets is already inside the 3.5 MET — 02054 in the Compendium is defined as multiple exercises, 8 – 15 reps, with rest. Subtracting the rest and multiplying the working minutes by a higher MET double-counts it, and it is the most common way this figure gets inflated.
The same lifter and the same hour, circuit training instead
- Per minute: 7.5 × 3.5 × 70 ÷ 200 = 9.2 kcal
- Over the hour: 9.2 × 60 = 551.25, which rounds to 551 kcal
- In kilojoules: 551.25 × 4.184 = 2,306 kJ
Nothing changed but the drop-down, and the number went up 2.1 times. Within one session the style is worth far more than the stopwatch: an extra 20 minutes of general training buys 86 kcal, while switching to circuits buys 294.
Limitations
The figure is an estimate built on a population average. Each MET value is the oxygen cost measured across a group of lifters doing that activity, and two people inside the same band can sit 15% either side of it. The formula also charges you for the whole session: the warm-up, the queue for the rack and the chat between sets all count as time at the band you picked. Watches read high, often by a quarter; a session spent mostly standing around belongs at the bottom of the six styles.
Frequently asked questions
- How are calories burned lifting weights calculated?
- Calories per minute = MET × 3.5 × body weight in kg ÷ 200. At the general 3.5 MET and 70 kg that is 4.3 kcal a minute, so a 60-minute session comes to 257 kcal. The MET is the one number you choose rather than measure, and for strength training it is the multiple of resting metabolism averaged over a whole session, rest included.
- Why is the number so much lower than my watch says?
- Because the watch is counting the heart-rate spike and this is counting the hour. A hard set of five reps does push you well above 3.5 MET, but the two minutes you spend sitting afterwards pull the average right back down, and the average is what the equation multiplies by the clock. Watches also add an estimate on top; treat the two as different questions.
- Do I enter the time I was lifting, or the whole session?
- The whole session, from walking in to walking out. Rest between sets is not a deduction — 02054 in the Compendium, which is the general row here, is defined as multiple exercises at 8 – 15 reps with rest taken between them, and that rest is inside its 3.5. Shortening the duration to the working minutes and keeping the same style counts the rest twice.
- How accurate is a MET-based estimate?
- Within about 15% for a group, and less than that for one person on a normal day. The MET is an average of the people who were measured, and the formula assumes the whole session sat at that band. Treat the answer as a centre point: 257 kcal means something between roughly 220 and 300, and quoting it to the decimal would be false precision.
- Does circuit training burn more than strength training?
- Yes, roughly twice as much for the same hour — 7.5 MET against 3.5, which at 70 kg is 551 kcal against 257. Circuit training keeps you moving between stations, so the rest between sets is short, and the MET values reflect that. The bigger lever, though, is still the clock and body weight.
References
- 2024 Adult Compendium of Physical Activities — Adult Compendium of Physical Activities
- ACSM metabolic calculations (course handout) — Texas Tech University, Department of Kinesiology and Sport Management
- Physical Activity Guidelines for Americans, 2nd edition — Office of Disease Prevention and Health Promotion