Calories burned by activity

How many calories does weight training burn?

The answer surprises people: lifting burns little. That is not why it is the most useful of the sixteen.

315 kcalEstimated additional burn

The maths runs in your browser: your weight is not sent anywhere.

Hourly expenditure

WeightEasy · 3.5 METModerate · 5 METHard · 6 MET
60 kg158 kcal252 kcal315 kcal
70 kg184 kcal294 kcal368 kcal
80 kg210 kcal336 kcal420 kcal
90 kg236 kcal378 kcal473 kcal

Estimated additional burn

What moves the number

The Compendium does not tell a squat from a curl — it tells long rests from a continuous circuit. DENSITY moves the number, never the exercise, and the spread is only 3.5 to 6 MET. An hour of lifting therefore burns less than an hour of hard cycling. Its value lies elsewhere, and it is larger: it is the only activity on this list that builds muscle, and muscle burns around the clock, including on the days you do not train.

Why this number is lower than elsewhere

The MET formula gives TOTAL expenditure during effort, rest included — an hour sitting down is already 1 MET. Most calculators display that gross figure. The problem: your basal metabolism is already counted in your daily calorie needs. Showing the gross number counts it twice.

We subtract the resting MET and report only what the effort cost ON TOP. Thirty minutes of walking gives roughly 100 kcal here, against 140 elsewhere. It is less flattering, and it is the only number that does not contradict itself when you step on the scale a month later.

It is also why these calories are never handed back to your food budget in the app: a workout is not a licence to eat.

Where the number comes from

A MET measures the cost of an activity relative to rest: 8 MET is eight times what a still body burns. The values used here come from the Compendium of Physical Activities (Ainsworth et al., 2011), the reference table of physical activity research.

Expenditure is then: (MET − 1) × 3.5 × weight in kg × minutes ÷ 200. Weight matters because you have to move it; duration matters more than anything else.

These are population estimates. Two people of the same weight doing the same effort can differ by 10 to 15 %: fitness, technique, temperature. Use these numbers to compare sessions with each other, not to balance a day to the calorie.

General, informational benchmarks based on published values validated on the general population. Real expenditure varies between two people with the same profile. These numbers do not replace a doctor or dietitian.