Calculate half marathon pace from a target finish time, including mile and kilometer paces and even cumulative splits.
Translate the goal into repeatable splits
Enter a finish-time goal, choose the distance unit used by your course markers, and save the corresponding splits. Compare a second target time while keeping the unit unchanged. That makes the time difference easy to read at each marker. The split schedule is a timing plan, not a prediction of fitness or an adjustment for elevation, weather, congestion, or stops.
Inputs and method
Enter finish time and choose split units. Pace and cumulative splits use the standard 21.0975 km half-marathon distance; calculations retain raw seconds and round split displays to the nearest second.
Interpreting the estimate
Use the result as a planning value and keep input precision consistent with the measurements or source data you have. Small displayed differences can come from final-place rounding; intermediate values are not rounded.
Assumptions and limits
Even pacing is an arithmetic plan, not a prediction or coaching prescription. Course measurement, terrain, weather, stops, and individual capacity affect actual splits.
Rejecting empty, invalid numeric, prohibited negative, zero-denominator, impossible, or unsupported inputs prevents the page from presenting a misleading numeric result. For related running tools, see the running pace calculator, the pace converter calculator, and the stride length calculator.
Method basis
Pace and cumulative splits are publisher derivations from the stated 21.0975 km distance and entered finish time. The route does not provide race-day guidance.