Key Takeaways
- Rock climbing MET values range from 5.8 (indoor top-rope) to 11.0 (difficult outdoor routes), making it comparable to vigorous running.[3]
- A critical factor in climbing calorie estimation is the ratio of active climbing to rest/belaying time — climbers typically spend only 30–50% of a session actually on the wall.[4]
- Bouldering (MET 8.8) involves high-intensity bursts with complete rest between problems, creating an interval-like metabolic pattern.[5]
- Overhanging routes significantly increase energy demand due to greater grip, arm, and core engagement compared to slab or vertical walls.[6]
MET Values by Climbing Type
| Climbing Type | MET | Cal/30min (70kg) |
|---|---|---|
| Belaying / Rappelling | 3 | 110 |
| Indoor Top-Rope | 5.8 | 213 |
| Indoor Lead | 7.5 | 276 |
| Outdoor (Moderate) | 8 | 294 |
| Indoor Bouldering | 8.8 | 323 |
| Treadwall | 10.5 | 386 |
| Speed Climbing | 10.5 | 386 |
| Outdoor (Difficult) | 11 | 404 |
MET values from the 2024 Compendium of Physical Activities.[3] Cal/30min shown for 70 kg assuming continuous active climbing.
Why Active vs Rest Time Matters
Unlike continuous activities (running, cycling), rock climbing sessions involve significant downtime. Route climbers alternate between climbing and belaying their partner. Boulderers rest between problems to recover grip strength and plan attempts. Research suggests that actual climbing time represents only 30–50% of total gym time.[4]
This calculator separately estimates calories during active climbing (using the selected climbing MET) and rest/belaying time (MET 2.5), giving a more realistic total than assuming continuous climbing.
For a broad comparison to other activities, explore our Exercise Calorie Calculator.
How Wall Angle Affects Intensity
Slab (<90°)
Less than vertical. Relies more on footwork and balance, with lower upper-body demand. Reduces MET slightly compared to vertical.
Vertical (90°)
Standard wall angle. Balanced demand between upper and lower body. The baseline for all MET values in this calculator.
Overhang (>90°)
Significant arm, grip, and core engagement. Research shows overhanging routes can increase energy expenditure by 10–15% compared to vertical walls.[6]
Frequently Asked Questions
Sources & References
- Sedentary Behaviour and Energy Expenditure. Various. PMC (2019)
- Health Benefits of Physical Activity. Various. PMC (2016)
- 2024 Adult Compendium of Physical Activities. Ainsworth BE et al.. Compendium of Physical Activities (2024)
- Physiological Demands of Rock Climbing. Various. British Journal of Sports Medicine (2004)
- Energy Expenditure in Bouldering. Various. PubMed (2019)
- Wall Angle and Climbing Intensity. Various. Journal of Sports Sciences (2018)
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