Pace to finish time calculator

It takes Units, Pace and Distance and derives Finish time and Reading from them. The calculation is live as you type, so the result updates on every change.

3 values: Units, Pace and Distance. Nothing else is required — no account, no file upload.

With Units = min/km and km, Pace = 5 and Distance = 10, the calculator returns Finish time = 50:00 and Reading = 10 km × 5.00 min/km. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

You can pick between « min/km and km » and « min/mi and miles ». Each one changes what the calculator works out, so switch and compare — the default is « min/km and km ».

Preparing a race: the pace a target time needs, the splits to hold it, and the training zones that sit under it — on foot, and equally on a bike or in a pool, where the same session is measured in watts or in a hundred-metre split instead.

Scaling a time linearly to a longer distance. A marathon is not two half-marathons; race predictors use an exponent around 1.06 precisely because fatigue is not proportional.

This one returns Finish time and Reading; the Pace Calculator returns Pace and Average speed (km/h). That is the whole difference — open the one whose figure you need.

Swimming pace calculator is the closest one after this: Compute your swimming pace per 100 m and speed from a distance and time.

Target race pace calculator and Race time predictor — they come up in the same task often enough to be worth a second tab.

Pace arithmetic is exact. Race predictions follow Riegel's formula, which assumes training matched to the longer distance — without it the prediction is optimistic.