Elevation gain calculator

Total ascent is what your legs do; the sum on a cycling computer reads the same only when the noise threshold matches the device's smoothing. A threshold of 5 metres is a fair default for GPS tracks; barometric logs can take 1 or 2. GPX distances come from the track's own coordinates, so a track with no times still works, and route files without ele heights are refused rather than totalled as zeros. The profile chart is a downsampled sketch of the smoothed series, good for shape, not for reading exact heights off.