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Speed, distance, time

Choose what you want to work out, fill in the other two, and it appears. The answer is outlined in red and cannot be typed into.

Distance
km
Time
h m s
Pace
: /km
Speed
km/h

Jump to a distance

At this pace

How long the standard distances take at the pace above.
Distance Kilometres Time

How it works

One equation does all of it: time = distance × pace. Rearranged, that is also pace = time ÷ distance and distance = time ÷ pace, which is exactly what the three options in the menu pick between.

Speed is the same thing upside down — 3600 divided by the pace in seconds per kilometre gives kilometres per hour, which is why editing either one moves the other, and why asking for pace fills in both.

Seconds are rounded for display, so typing a pace, then a time, then back again can shift a value by a second. The underlying numbers keep their full precision; only what you see is rounded.

Nothing is saved — reload and it goes back to 10 km at 5:00 per kilometre.