Walking Time Calculator Walking Time Calculator Length of the walk (in miles): Total climbing (in metres): Total descent (in metres): Total breaktime (in minutes): Calculate Time Estimation method: flat walking speed 3 mph + 1 min per 10m ascent + 1 min per 20m descent (approx.) How To Use Walking Time CalculatorEnter the total walking distance in miles.Type the total climbing height in metres.Add the total descent in metres.Enter your total break time in minutes.Click Calculate Time to see your estimated walking duration.