PaceCalc
Calculate pace

Exact 21,097.5 metres

Half-marathon pace calculator

The half-marathon preset uses exactly 21,097.5 metres. Add your time or pace to produce a transparent even-split plan.

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Distance, time, and pace

Calculated on this page

What should PaceCalc calculate?

Distance

Metric distances accept up to six decimals; miles accept up to three.

Elapsed time

Use whole hours, minutes, and seconds. Minutes and seconds must stay below 60.

Split table unit

Rows are cumulative at each whole kilometre or mile, plus the exact finish.

PaceCalc performs steady-pace arithmetic only. It does not predict race performance, prescribe training, or adjust for terrain, weather, fatigue, or health.