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Climbing VAM Calculator

Enter the elevation gain and climb time to get your VAM in vertical metres per hour.

How it is calculated

VAM is vertical metres climbed per hour: VAM = ascent ÷ (time_min ÷ 60). ascent is the elevation gain in metres and time_min is the climbing time in minutes, not hours; the tool converts the minutes to hours itself. The answer is rounded to a whole number and shown in m/h. Ascent can be 0 (the result is then 0 m/h) but not negative, and the time must be greater than zero, otherwise no result is returned. VAM ignores distance and gradient, so it only compares climbs fairly if you measure the gain and the time over the same continuous uphill section, without stops.

Worked example

A rider climbs 850 m of elevation in 52 minutes. First convert the time to hours: 52 ÷ 60 = 0.8667 h. Then divide the ascent by it: 850 ÷ 0.8667 = 980.77. The tool rounds to a whole number and shows 981 m/h. For comparison, 1000 m in 45 minutes works out to 1,333 m/h, so the first effort is the slower of the two even though the climb is shorter.

Try this example →

Common mistakes

  • Typing the climb time in hours or as hh:mm; the field expects total minutes, so 1 h 5 min must be entered as 65.
  • Using distance instead of elevation gain; VAM counts vertical metres only.
  • Including a descent, a flat section or a coffee stop in the time while using the ascent of the climb alone, which lowers the VAM.
  • Using the total ascent of a whole ride for a single climb, or the reverse.
  • Comparing a VAM from a short, hard effort with one from a long climb; the same rider will produce a higher figure over a short effort.

About this calculator

This calculator computes VAM (velocità ascensionale media), Italian for "average ascent speed" — the number of vertical metres climbed per hour, found by dividing elevation gain by climb time (in hours). A cyclist who climbs 1,000 m in 45 minutes, for instance, posts a VAM of 1,333 m/h.

Cyclists and coaches use VAM to compare climbing performance independent of gradient or road surface, since it isolates pure vertical speed rather than horizontal pace. Elite professional climbers on sustained mountain stages typically hold VAM figures around 1,700–1,850 m/h, and the metric is widely used alongside power-to-weight ratio to gauge and flag suspicious climbing performances.

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