Planning note
Mathematical travel time is not the same as scheduled arrival time. For real trips, add stops, boarding time, route uncertainty, traffic, weather and charging or refueling time where relevant.
Example
A 120 km trip at an average speed of 60 km/h takes 2 hours. A 15-minute stop makes the door-to-door time 2 hours and 15 minutes.
Common mistakes
Use realistic average speed, not the speed limit or your fastest segment. For cycling, walking and driving, stops often matter more than the formula suggests.
Unit discipline
Distance and speed must use matching distance units. Kilometers divided by kilometers per hour returns hours; miles divided by miles per hour also returns hours.
Last reviewed: 2026-05-17