Calories Burned Weight Lifting Calculator
Estimate calories burned lifting weights from your body weight, session length, and training intensity. Free MET-based calculator with an afterburn estimate.
Calories Burned Weight Lifting Calculator
Units
Body weight
Body weight multiplies straight into the MET formula, so it moves the result more than anything else.
Session
Count time in the gym, warm-up and rest periods included. Sessions per week drives the weekly total only.
Training style
Rest length is the honest way to pick here. "Moderate effort" means nothing to a lifter, but a 3 minute rest versus a 60 second one is something you can look at in your own training.
Afterburn estimate
EPOC is shown as its own range and is never folded into the headline number.
Beyond the session
Estimates only, built from standardized MET values in the Compendium of Physical Activities. Individual burn varies by roughly 10 to 25% with training age, muscle mass, rest discipline, and how much of the session you spend actually lifting. Do not treat the fat-loss equivalent as a promise: it assumes your intake does not move.
How the calculator works
Every credible calorie estimate for lifting runs on the same equation. MET stands for metabolic equivalent of task, a unit that describes an activity relative to sitting still. One MET is defined as 3.5 mL of oxygen per kilogram of body weight per minute, and roughly 5 calories are released for each liter of oxygen your body consumes. Divide 3.5 by 200 and you have a clean conversion from oxygen cost to calories per kilogram per minute.
kcal/min = MET x 3.5 x body weight in kg / 200
session kcal = kcal/min x minutes
Work the default through by hand. A 180 lb lifter is 81.6 kg. Moderate weight training is 3.5 MET, so kcal/min = 3.5 x 3.5 x 81.6 / 200, which is about 5.0 cal a minute. Over a 45 minute session that comes to roughly 225 calories. Body weight sits in the numerator because moving a heavier body (and usually heavier loads) costs more oxygen, which is why two people doing identical sessions get different numbers.
The tool also shows a net figure. MET-derived calories include the resting energy you would have spent lying on the couch instead, so subtracting one MET gives the calories genuinely added by training:
net kcal = (MET - 1) x 3.5 x body weight in kg / 200 x minutes
Use the gross number when you want to know what the session cost. Use the net number if you are eating workout calories back, because the resting portion is already inside your maintenance figure. The afterburn row applies 6 to 15% to the net value, the range Borsheim and Bahr reported for post-exercise oxygen consumption across exercise intensities and modes.
MET values used
| Training style | MET | Compendium entry |
|---|---|---|
| Moderate | 3.5 | 02054, resistance training, multiple exercises, 8 to 15 reps at varied resistance (2024) |
| Supersets | 5.8 | 02055, resistance training, circuit, reciprocal supersets, peripheral heart action (2024) |
| Heavy / vigorous | 6.0 | 02050, free weight or machine resistance training, power lifting or body building, vigorous effort (2024) |
| Circuit | 8.0 | 02040, circuit training including some aerobic movement, minimal rest (2011 Compendium code 02040) |
The first three values come from the 2024 Adult Compendium of Physical Activities tracking guide. The circuit figure of 8.0 is the 2011 Compendium value for code 02040. There is no confirmed 2024 revision for that entry, so the older number stands.
What actually changes your calorie burn in the gym
Rest length is the lever most lifters ignore, and it is the largest one available inside a fixed 45 minutes. Straight sets with 3 minute rests are close to 3.5 MET. The same 45 minutes reorganized into supersets with 60 to 90 second rests moves you to roughly 5.8 MET, which is a jump of about 65% in per-minute burn without adding a second to the session. Density, not effort, is doing that work.
Exercise selection comes next. Squats, deadlifts, presses, and rows move a lot of mass through a long range and recruit large muscle groups, so they cost more oxygen per set than curls or lateral raises. Load and total volume matter, though less than people expect: doubling the weight on a set does not double the calories, because the set is short and the rest that follows is where most of the clock goes. Body weight then scales the whole result, since it multiplies directly in the formula.
One more thing worth knowing: your watch and this calculator will disagree, often by a lot. Heart-rate-based estimates overstate lifting because of the pressor response. Bracing under a heavy bar spikes heart rate through blood pressure and breath-holding, not through oxygen demand, so the watch reads a hard set of squats as if it were a sprint. For steady aerobic work the two methods converge, which you can see by comparing this page with the running calories calculator or the walking calories calculator.
Using this alongside a 75-day challenge
Most 75-day challenge formats ask for a daily workout, sometimes two, and a 45 minute strength session covers that cleanly. Logging the minutes matters more than chasing the calorie number: 45 minutes is the default duration for the Workout task in Reset75, and the statistics dashboard rolls those session minutes up across the full 75 days so you can see whether the plan actually happened.
On the nutrition side, put the weekly total in context rather than treating it as free food. Four moderate sessions a week for a 180 lb lifter is roughly 900 calories, about a quarter of a pound of fat if nothing else changes, which is real but small next to the intake side. Set your maintenance with the TDEE calculator, pick a daily target with the calorie deficit calculator, and protect your muscle during the cut with the protein intake calculator. If you want to push the strength side too, the one rep max calculator turns a recent set into training percentages you can program against.
Frequently Asked Questions
Common questions about calories burned weight lifting calculator
How many calories does 1 hour of weight lifting burn?
Most people land between roughly 180 and 500 cal an hour. A 155 lb lifter burns roughly 260 cal in an hour of moderate weight training and around 440 cal in an hour of vigorous lifting. Body weight is the biggest single variable, followed by how much of the hour you actually spend under load rather than resting between sets.
What MET value should I use for weight lifting?
The Compendium of Physical Activities lists 3.5 MET for general resistance training at 8 to 15 reps with varied resistance (code 02054), 5.8 MET for superset and circuit-style resistance work (02055), and 6.0 MET for vigorous power lifting or bodybuilding-style training (02050). Full-on circuit training with minimal rest sits near 8.0 MET. The calculator picks the matching value from whichever training style you select.
How is calories burned lifting weights calculated?
The standard MET formula: calories per minute = MET x 3.5 x your body weight in kg / 200. Multiply by your session length in minutes. One MET is defined as 3.5 mL of oxygen per kilogram of body weight per minute. That is roughly what your body uses sitting still, and the 3.5/200 factor converts that oxygen cost into calories.
Does lifting weights burn calories after the workout?
Yes, though less than the internet suggests. Excess post-exercise oxygen consumption, or EPOC, keeps your metabolism slightly elevated while your body restores itself. Research summarized by Borsheim and Bahr puts the effect at roughly 6 to 15% of the net calories burned during the session itself. On a session with 250 net calories that is another 15 to 38 cal, not a second workout worth of burn.
Does weight lifting or cardio burn more calories?
Minute for minute, cardio wins. An hour of running at a moderate pace burns far more than an hour of lifting, largely because lifting involves a lot of standing around between sets. Compare the two directly with the running calories calculator. Lifting's advantage is what it does over months: it builds and preserves muscle while you are in a deficit, and it produces a somewhat larger afterburn.
Does muscle burn more calories at rest?
It does, but the number is modest. A pound of muscle burns roughly 6 cal a day at rest versus about 2 for a pound of fat. Adding 5 lb of muscle is worth something like 20 to 30 extra cal a day. The real benefit of strength training during a fat-loss phase is holding onto the muscle you already have, so more of what you lose is fat. The protein intake calculator covers the intake side of that.
Should I count lifting calories in my daily total?
Be conservative if you do. MET-based estimates are population averages and can be off by 10 to 25% for any individual, and the number includes the resting calories you would have burned anyway. If you are eating workout calories back, use the "net of resting burn" figure rather than the headline number, and eat back only part of it. Set your baseline first with the TDEE calculator.
Can I count a lifting session as my workout in a 75-day challenge?
Yes. A 45 minute strength session covers the daily Workout task in most 75-day challenge formats, and 45 minutes is the built-in target for the Workout task in Reset75. If your challenge calls for two workouts a day, pairing a lifting session with a walk is the usual approach, since the two do not compete for the same recovery.