Calories Burned Weight Lifting Calculator

Background.

A weight session feels hard, yet much of it is spent standing still. Between sets you rest, load plates, reset your grip and get your breath back, and even within a set the work comes in short bursts. That is why lifting burns fewer calories per minute than a steady run, and why its real payoff is strength and muscle rather than energy spent.

The estimate rests on metabolic equivalents, or METs. One MET is the energy cost of sitting quietly, defined as 3.5 mL of oxygen per kilogram of body weight per minute, and the Adult Compendium of Physical Activities rates lighter weight training at 3.5 METs and vigorous lifting at 6.0. Choose the one that fits your session, enter your weight and the minutes, and those three numbers are multiplied together and converted to kilocalories.

At the lighter setting a 70 kg lifter is credited with about 4.3 kcal a minute; at the vigorous setting, 7.35. Across a 45-minute session that gap is roughly 138 kcal, so choosing the intensity honestly matters more than anything else you type in.

The result is a gross figure. It includes the energy your body would have used anyway over those minutes, about 1.2 kcal a minute for someone weighing 70 kg. It leaves out the extra oxygen you use while recovering after a hard session, and it cannot see how heavy the bar was, how short your rests were or how trained you are. Use it as a population average for planning meals, not as a measurement of you.

What is calories burned weight lifting calculator?

Calories burned lifting weights is the total energy your body spends during a resistance-training session, given in kilocalories, the units food labels print as Calories. Here it is derived from a MET value, a multiple of resting energy use that the Adult Compendium of Physical Activities assigns to an activity from published energy-cost studies. Two values cover weight training on this page: 3.5 for light to moderate sessions and 6.0 for vigorous ones.

How to use this calculator.

1. 01Type in what you weigh, in kilograms. If your scale reads pounds, divide by 2.205, so 180 lb becomes about 81.6 kg.
2. 02Enter the length of the lifting itself in minutes. Leave out a cardio warm-up or a stretching cool-down; those burn energy at different rates and belong in an estimate for that activity.
3. 03Choose vigorous only if you moved briskly between exercises with short rests and were breathing hard for most of the session, as in circuit-style training. Long rests of several minutes between heavy sets call for the light/moderate setting.
4. 04Read the calorie figure together with the MET shown beside it, which confirms the intensity that was applied.

The formula.

Calories = MET × 3.5 × weight (kg) ÷ 200 × minutes. MET is the intensity you chose, 3.5 or 6.0. The 3.5 that follows is the resting oxygen uptake that defines one MET, in millilitres per kilogram per minute, so MET × 3.5 × weight is your oxygen use in millilitres per minute during the session. Dividing by 200 turns oxygen into energy on the standard approximation that each litre of oxygen consumed releases about 5 kcal; dividing by 1,000 and multiplying by 5 is the same as dividing by 200. Multiplying by minutes gives the session total. Every term multiplies, so a heavier lifter, a longer session or a higher intensity raise the answer in direct proportion, and moving from 3.5 to 6.0 adds 71%.

A worked example.

Frequently asked questions.

References& sources.

1. [1]Adult Compendium of Physical Activities. 2024 Adult Compendium. Activity-specific metabolic equivalent codes. Retrieved 2026-08-06.
2. [2]U.S. National Institutes of Health. Health information current 2026. Evidence-based health measurement context. Retrieved 2026-08-06.
3. [3]U.S. National Library of Medicine. PubMed record current 2026-08-06. Indexed derivation and validation literature. Retrieved 2026-08-06.