Work out calories and kilojoules burned rock climbing — indoor gym sessions, bouldering, or routes outdoors — based on your body weight, effort level, and how long you're on the wall.
Rock climbing burns calories in proportion to your body weight and how continuously you're moving on the wall, captured in a MET (Metabolic Equivalent of Task) value for each effort level. The formula is calories = MET × body weight in kilograms × time in hours. Because climbing engages your arms, core and legs against your own bodyweight, it sits well above most steady-state cardio at a comparable effort level. A 68 kg climber at general/moderate effort (MET 10.0) for 45 minutes burns close to 510 kcal, about 2,134 kJ.
| Metric | Value |
|---|
| Effort Level | MET | Calories | Kilojoules |
|---|
The calculation rests on three things: how continuously you're climbing versus resting (expressed as a MET value for the effort level), your body weight, and how long the session lasts. A higher effort level and a heavier body both burn more per minute, and more minutes on the wall simply adds more total calories on top.
The table below holds effort level fixed at general/moderate (MET 10.0) for a 45-minute session, so you can see how much body weight alone changes the total.
| Body Weight | MET | Calories (45 min) | Kilojoules |
|---|---|---|---|
| 60 kg | 10.0 | 450 kcal | 1,883 kJ |
| 68 kg | 10.0 | 510 kcal | 2,134 kJ |
| 70 kg | 10.0 | 525 kcal | 2,197 kJ |
| 80 kg | 10.0 | 600 kcal | 2,510 kJ |
| 90 kg | 10.0 | 675 kcal | 2,824 kJ |
| 100 kg | 10.0 | 750 kcal | 3,138 kJ |
Here body weight is fixed at 68 kg and duration at a full hour, so you can see exactly how much continuous, minimal-rest climbing changes the burn rate on its own.
| Effort Level | MET | Calories/hour | Calories/minute |
|---|---|---|---|
| Slow / easy effort | 8.0 | 544 kcal/hr | 9.07 kcal/min |
| General / moderate effort | 10.0 | 680 kcal/hr | 11.33 kcal/min |
| Fast / vigorous effort | 12.0 | 816 kcal/hr | 13.60 kcal/min |
Climbing is naturally intermittent: you climb a route or boulder problem, then stop to rest, chalk up, discuss beta with a partner, or wait for a belay, before starting again. That rest time doesn't disappear from your session length, but it does very little to raise your calorie burn compared with the minutes you actually spend moving on the wall. This is exactly why the three effort tiers in this calculator exist — they're a proxy for how much of your total session time is spent climbing versus recovering. A session built mostly of long rests between short bursts of climbing behaves like the slow/easy tier, even if you feel like you worked hard during each individual attempt. A session where you keep moving from problem to problem or route to route with only brief pauses behaves like the fast/vigorous tier and burns meaningfully more over the same clock time. If you want a more accurate personal estimate, think honestly about what fraction of your session was spent actually climbing and pick the effort tier that best reflects that balance, rather than just how hard any single move felt.
For a matched effort level, indoor and outdoor climbing sit in a similar MET range, so the calculator above works reasonably well for a gym session, a day of bouldering, or a single-pitch outdoor climb. What outdoor climbing sometimes adds is everything around the climbing itself: hiking to the base of a crag, carrying gear, and — for multi-pitch routes — extended time on the rock that includes belaying, route-finding and rope management stretched across hours. That approach hiking and any multi-pitch downtime is worth calculating on its own using a hiking or walking calorie calculator, since folding it into a single climbing MET value would understate the hiking portion and overstate the climbing portion. Treat this calculator as covering the time you're actually engaged with the wall or rock face, and add approach or hiking time separately if your day includes it.
Australian nutrition panels list energy in kilojoules, not calories, so it helps to convert your climbing burn into the same unit your food packaging uses. Multiply your calorie figure by 4.184 to get kilojoules. A 68 kg climber doing 45 minutes at general effort burns about 510 kcal, which is roughly 2,134 kJ — useful to know if you want to weigh a climbing session against the energy value printed on a recovery snack or sports drink label.
How many calories does rock climbing burn per hour?
For a 68 kg climber, slow/easy effort (MET 8.0) burns about 544 kcal per hour, general/moderate effort (MET 10.0) burns about 680 kcal per hour, and fast/vigorous effort (MET 12.0) burns about 816 kcal per hour. Use the calculator above with your own body weight for a more precise hourly figure.
Does bouldering burn more calories than top-rope climbing?
Not necessarily by MET value alone — both fall within the same MET range used in this calculator, since the number is driven mainly by how continuously you're moving rather than the climbing style itself. Bouldering sessions often land at the higher end (fast/vigorous, MET 12.0) because problems are short and climbers tend to attempt them back-to-back with brief rests, while a typical top-rope session, with longer waits for belaying and route-setting between climbs, more often sits at general or even slow effort. Choose the effort tier that matches how much of your session is actually spent climbing rather than resting.
Why does climbing feel so much harder than the calorie number suggests?
Climbing places enormous, concentrated demand on your forearms, fingers and grip, which fatigue locally long before your whole-body calorie burn looks especially high on paper. A MET value reflects average whole-body energy cost, not the intense, localised strain your forearm flexors experience gripping small holds — so a session can leave your arms shaking and your grip failing while the total calorie figure looks comparable to a brisk gym workout. The subjective difficulty of climbing comes from muscular fatigue and technical demand, which calorie counting alone doesn't fully capture.
Is indoor climbing as good a workout as outdoor climbing?
Yes, for a given effort level the MET values used in this calculator apply similarly whether you're climbing in a gym or outdoors, since the energy cost mostly depends on how continuously and intensely you're moving up the wall or rock. Indoor climbing gyms make it easier to string together consistent, minimal-rest attempts, which can push your session toward the higher effort tiers. Outdoor climbing, particularly multi-pitch routes, often adds substantial extra energy expenditure from hiking to the base and approach walks, which this calculator doesn't include and is worth estimating separately.
How does climbing compare to running for calorie burn?
At general/moderate effort (MET 10.0), rock climbing burns calories at roughly the same rate as running at a solid pace around 9.5–10 km/h, which typically sits in a similar MET range. Fast/vigorous climbing (MET 12.0) can burn calories faster than that, comparable to a harder running pace, while slow/easy climbing (MET 8.0) burns less than most continuous running but still well above walking. The key difference is that climbing spreads the effort across your arms, core and legs rather than concentrating it in your legs alone.
Does climbing build muscle as well as burn calories?
Yes. Unlike pure cardio activities such as running or cycling, climbing loads your forearms, back, shoulders, core and legs against resistance with almost every move, which makes it an effective strength-building activity alongside its calorie burn. Regular climbers commonly develop noticeably strong grip and pulling strength as a result. This dual benefit — calorie burn plus resistance training — is part of why climbing is often rated as a particularly efficient full-body workout for the time invested.
What's a realistic calorie burn for a beginner climbing session?
Beginners typically spend more time resting between attempts, working out technique, and being lowered or belayed than experienced climbers, so a beginner session often sits closer to slow/easy effort (MET 8.0) even if it feels tiring. For a 68 kg beginner climbing for 45 minutes at this effort level, that works out to about 408 kcal. As technique and stamina improve and rest periods shorten, the same session length naturally shifts toward the general or fast effort tiers and a higher calorie total.
What are the limitations of MET-based estimates for climbing?
MET values are population averages drawn from studies of typical climbers and don't account for individual differences in technique efficiency, route difficulty, body composition, or how a specific session mixes climbing with resting, belaying and route-reading. Two climbers moving for the same 45 minutes can have quite different actual energy costs depending on how efficiently they climb and how much of that time is spent hanging on the wall rather than moving. Treat the results here as a solid estimate for planning and comparison purposes, not a precise measurement of your individual energy expenditure.