How Many Calories Does CrossFit Burn?

CrossFit calorie questions assume every WOD is the same. A heavy strength day is not a 12-minute AMRAP of burpees. Treat “CrossFit” as a brand umbrella, then judge density.

Using a working MET of about 8 (vigorous mixed-modal WOD average — programming varies by box), a 70 kg person lands near 280 calories in 30 minutes — roughly 560 per hour. Scale up or down with bodyweight; long rests and easy intervals pull the real total lower.

Fat loss still follows weekly energy balance. Treat class boards and wearables as a range, not a free pass for unlogged meals.

Calorie estimates by bodyweight and duration

Estimated calories for CrossFit (MET ≈ 8) — approximate, Compendium-style intensity:

55 kg: 15 min: ~110 · 30 min: ~220 · 45 min: ~330 · 60 min: ~440

70 kg: 15 min: ~140 · 30 min: ~280 · 45 min: ~420 · 60 min: ~560

85 kg: 15 min: ~170 · 30 min: ~340 · 45 min: ~510 · 60 min: ~680

These assume continuous effort at the stated intensity. Instruction breaks, water stops, and scrolling between rounds do not count as work.

What actually drives the burn

MET ≈ 8.0 fits many vigorous mixed WODs with limited rest. Strength-biased days with long rests behave closer to lifting. Your whiteboard, not the logo, sets the MET.

Heavier bodies expend more energy doing the same pattern. Intensity and continuous minutes beat the nickname on the timetable.

Wearables and studio boards

Wrist estimates struggle with load, rest, and non-step movement. Studio boards and machine screens are convenient and often optimistic.

In a cut, plan food as if the printed burn were 20–40% lower unless your scale trend says otherwise.

Training value vs calorie theater

Excellent for work capacity and community. Recovery debt is real — chase PRs and protein, not only the calorie screenshot.

If physique change matters, keep protein around 1.6–2.2 g/kg and protect sleep. A calorie badge does not replace progressive work or an honest diary.

Where IGNITE AI fits

WOD culture loves “eat big.” Progress loves receipts. IGNITE AI is the tracker that survives post-WOD chaos: photo the plate, fix macros in two taps, and keep the session on the same timeline so volume and intake stop living in separate apps.

Bottom line

Expect roughly 280 kcal in 30 minutes at 70 kg for crossfit at MET ≈ 8, then adjust for your weight and how hard you actually moved.

If your box is serious, your log should be too. IGNITE AI — photo macros plus workouts when the whiteboard meets the kitchen.