Climb Time & VAM Calculator

Your weight in kilograms including kit. On a climb almost every watt fights gravity, so time scales nearly in proportion to total weight.

Bike weight including bottles and gear, in kilograms. It is added to your weight for the gravity term.

The average power in watts you can hold for the whole climb. For long climbs this is close to your FTP; on short ones you can go higher.

Length of the climb measured along the road, in kilometers, as it would appear on a route profile.

Average gradient of the climb in percent. Combined with the length it fixes the height gained.

Example: 7.5% over 8 km gains 600 m of elevation.

Elevation at the foot of the climb in meters, used to set air density for the small aerodynamic term. It matters less here than on flat roads because climbing speeds are low.