VAM Calculator
Calculate VAM, or vertical ascent meters per hour, from elevation gain and elapsed time. The result helps compare climbing performance across hiking, trail running, and cycling.
What does VAM mean?
VAM means vertical ascent meters per hour. It is commonly used in cycling, but the same idea is useful for hiking and trail running. It answers one simple question: if you kept this climbing rate for one hour, how many vertical meters would you gain?
How is VAM calculated?
The calculator can also use feet as input, then converts the result back to meters per hour and feet per hour. If you enter horizontal distance, it adds grade and speed context.
Why use VAM instead of pace?
On steep climbs, pace per kilometer can be misleading. A kilometer with 400 m of climbing is not comparable to a flat kilometer. VAM gives a cleaner view of climbing performance, especially when comparing ascent-focused routes.
What should you watch out for?
VAM is affected by gradient, altitude, temperature, surface, and pack weight. A high VAM on a smooth climb does not mean you will match it on loose rock or stairs. For meaningful comparisons, use similar terrain and similar measurement methods.
Frequently asked questions
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No. It is popular in cycling, but hikers and trail runners can use it whenever climbing rate matters.
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For performance, higher usually means faster climbing, but the route context matters. Technical terrain can lower VAM even when effort is high.
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Yes, if you know elevation gain and time. Moving time gives a fitness-focused number; elapsed time gives a trip-planning number.
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Not directly. VAM uses elevation and time. Distance only helps explain gradient and route context.
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VAM is normally used for ascent. Downhill performance needs different metrics.