Calories Burned Doing crossfit at 75 kg — 600 kcal per Hour
Doing crossfit at 75 kg (154–176 lb) burns about 600 kcal per hour. That figure comes from the activity's MET value of 8 in the 2011 Compendium of Physical Activities, multiplied by body weight: 8 × 75 kg × 1 hour = 600 kcal. This page works the numbers out in full — for 15, 30, 45, 60 and 90 minutes, across all four weight bands, and against four comparable activities at the same weight — so you can plan sessions with real figures instead of guessing.
CrossFit is a branded training programme built around constantly varied, high-intensity functional movements: Olympic lifts, gymnastics and monostructural cardio (rowing, running, skipping) combined into a daily workout, or WOD, done in a group class. A WOD might be 21-15-9 thrusters and pull-ups against the clock, or a 20-minute circuit of rowing, wall balls and box jumps. At 8.0 METs — the circuit-training value, used here because the Compendium has no separate CrossFit entry — it is a vigorous activity, and the figure on this page is an average across WODs, not a promise for any single workout.
It suits experienced exercisers who enjoy group training, competition and variety, and who are comfortable with barbell and gymnastics movements. It is a demanding way in for a complete beginner: the standard advice is to start with an on-ramp or foundations course, learn the movements at low intensity, and scale every workout to your own ability. The headline number to remember is the hourly figure at your weight, or about half of it for a typical 30-minute WOD. That is 600 kcal per hour at 75 kg, or about 300 kcal for a 30-minute session. Everything below is an estimate: MET values are population averages, and your own burn will vary with fitness, technique and conditions. That does not make the numbers useless — it makes them a planning tool, and a good one, as long as you treat them as approximate.
Calculate your own numbers
Use the Calorie calculator to work out your own burn for doing CrossFit at your exact weight and session length. Enter your weight, pick the activity and set the duration, and the tool applies the same MET formula shown below. You can also try the TDEE calculator to see how this session fits into your total daily energy use.
Related pages in this section:
- Calories Burned Doing crossfit at 55 kg — 440 kcal per Hour
- Calories Burned Doing crossfit at 65 kg — 520 kcal per Hour
- Calories Burned Doing crossfit at 85 kg — 680 kcal per Hour
- Calories burned hub
The formula, shown and cited
The standard way to estimate the energy cost of an activity is the MET formula from the Compendium of Physical Activities (Ainsworth et al., Medicine & Science in Sports & Exercise, 2011; 43(8): 1575–1581):
Calories (kcal) = MET × body weight (kg) × duration (hours)
One MET is the energy you use sitting quietly at rest — about 1 kcal per kilogram of body weight per hour. An activity rated at 8 METs therefore uses 8 times as much energy as resting. The Compendium's MET values come from published studies that measured oxygen use during each activity, so they are measured averages, not guesses. The Compendium has no exact entry for CrossFit, so the data file uses the closest published value: circuit training, 8.0 METs.
Worked through for this page:
- MET for doing CrossFit: 8
- Body weight: 75 kg (the midpoint of the 70-80 kg band, 154–176 lb)
- Duration: 1 hour
- Calculation: 8 × 75 × 1 = 600 kcal
For a 30-minute session the same calculation is 8 × 75 × 0.5 = 300 kcal. Nothing else is hidden in the maths — if your weight or duration changes, only those two numbers change.
Your numbers at 75 kg
| Duration | Calculation | Calories burned |
|---|---|---|
| 15 minutes | 8 × 75 × 0.25 | 150 kcal |
| 30 minutes | 8 × 75 × 0.5 | 300 kcal |
| 45 minutes | 8 × 75 × 0.75 | 450 kcal |
| 60 minutes | 8 × 75 × 1 | 600 kcal |
| 90 minutes | 8 × 75 × 1.5 | 900 kcal |
That is about 10 kcal per minute of doing CrossFit at this weight. A short session still counts: even 15 minutes burns 150 kcal, and three 15-minute sessions across a day add up to the same 450 kcal as one 45-minute session.
How the burn changes with body weight
The MET value stays the same — it describes the activity, not the person — but the calorie total scales with weight, because a heavier body costs more energy to move:
| Body weight | Calories per hour | Calories per 30 minutes |
|---|---|---|
| 55 kg | 440 kcal | 220 kcal |
| 65 kg | 520 kcal | 260 kcal |
| 75 kg | 600 kcal | 300 kcal |
| 85 kg | 680 kcal | 340 kcal |
Two people doing the same activity for the same time can therefore burn quite different amounts, and that is expected — it is physics, not a mistake in the formula. If your weight sits between two rows, your figure sits between the two values.
At 75 kg (165 lb), the absolute numbers are well above the lightest band, because moving a heavier body costs more energy with every rep, step and transition. The effort feels the same as it does for a lighter person — the MET value describes the activity, not the person — but the calorie total is higher, and that is a real, physical difference, not an error in the maths. If your weight is near the top of the 70–80 kg band, your true figure sits a little above the numbers on this page.
How doing CrossFit compares
Here is doing CrossFit against four other activities at the same 75 kg, all using the same MET formula:
| Activity | MET | Calories per hour at 75 kg |
|---|---|---|
| doing CrossFit | 8 | 600 kcal |
| circuit training | 8 | 600 kcal |
| calisthenics at a vigorous effort | 8 | 600 kcal |
| running at 5 mph | 8.3 | 622 kcal |
| mountain biking | 8.5 | 638 kcal |
Use this table to choose, not to judge. A higher number means a harder session, not a better one: the activity you enjoy and repeat three times a week beats the activity that burns more per hour but that you quit after a fortnight. Mixing intensities across the week — one harder session, two easier ones — is usually more sustainable than doing the hardest activity every time.
Fitting doing CrossFit into your week
| Sessions per week | 30 minutes each | 60 minutes each |
|---|---|---|
| 2 sessions | 600 kcal | 1200 kcal |
| 3 sessions | 900 kcal | 1800 kcal |
| 5 sessions | 1500 kcal | 3000 kcal |
At 8 METs, doing CrossFit is vigorous-intensity activity, so it counts double towards the widely used adult activity target: 75 minutes of vigorous activity a week is the equivalent of 150 minutes of moderate activity. Two 30-minute sessions a week already give you 60 vigorous minutes and burn about 600 kcal a week at 75 kg. Build up gradually — add 10% to your weekly total at most, and keep at least one rest day.
How to use the result
Do three to four sessions a week with at least one rest day between hard days, and scale the load, reps and movements to your level — a scaled workout done well beats a prescribed workout done badly. Use the numbers on this page as a planning estimate, not a score, and do not eat back every calorie shown. If you are aiming to lose weight, keep the deficit modest at 300–500 kcal a day and keep total intake above the safety floors of 1,200 kcal a day for women and 1,500 kcal a day for men unless a healthcare professional advises otherwise.
What the number does NOT tell you
The MET formula is an average, and CrossFit is the least average activity on this site: a heavy strength day burns far less per hour than a sprint WOD, and a long hero workout burns more in total but at a lower average intensity. The 8.0 figure is a reasonable middle, but any single session can sit well above or below it. The formula also does not account for fitness, body composition or skill, and it says nothing about injury risk — high-rep Olympic lifts done tired are the classic risk, which is why coaching and scaling matter. If you have a health concern, check with a healthcare professional before starting.
Frequently asked questions
How many calories do I burn doing CrossFit for 30 minutes at 75 kg?
About 300 kcal. The maths is 8 METs × 75 kg × 0.5 hours = 300 kcal. That is an estimate from the Compendium average — your real burn depends on your fitness, your pace and the conditions. If you weigh more or less than 75 kg, use the weight table above to read your own figure.
Is doing CrossFit good for weight loss?
It can help, but only as part of an overall calorie deficit. At 75 kg, an hour of doing CrossFit burns about 600 kcal, which is a useful contribution — roughly the energy in a modest meal — but weight loss still comes from the total balance of food and activity across the week, not from one session. Aim for a gradual loss of 0.5–1% of body weight per week, and never drop below 1,200 kcal a day (women) or 1,500 kcal a day (men) without medical supervision.
How does doing CrossFit compare with circuit training?
At 75 kg, doing CrossFit burns about 600 kcal per hour against 600 kcal for circuit training — the two activities burn the same at this weight. The best choice is usually the one you will actually do several times a week — consistency matters more than a small difference in the hourly rate.
How accurate is the 8 MET value for doing CrossFit?
It is a population average from the 2011 Compendium of Physical Activities (Ainsworth et al.), which compiled measured energy costs across published studies. Individuals vary by roughly 10–20% around the average because of fitness, body composition, technique and conditions. Treat 600 kcal per hour as a planning estimate, not a precise measurement of your own body.
Does doing CrossFit build fitness as well as burn calories?
CrossFit builds broad general fitness — strength, power, endurance, agility and coordination — because it trains many qualities at once, though it is not the fastest route to a single goal such as a maximum squat or a marathon time.
Estimates only, not medical advice. Minimum safe intakes: 1,200 kcal/day women, 1,500 kcal/day men — consult a healthcare professional before a very-low-calorie diet.