How to calculate your running pace (min/km and min/mile)

Pace is the number runners actually train by. The Running Pace Calculator turns any distance + time into min/km and min/mile, then projects 5K through marathon finishes at that pace.

How it works

1. Distance — kilometers or miles.
2. Time — hours, minutes, seconds.
3. Read pace — per km, per mile, speed, and race projections.

The formula

Pace = time ÷ distance. A 47:30 10K is 4:45 min/km (47.5 ÷ 10) or 7:39 min/mile. Speed is the inverse: 60 ÷ 4.75 = 12.6 km/h.

Using the projections

Projections hold pace constant, which flatters longer races — most runners slow 5–8% when doubling race distance. Use them to sanity-check goal splits: a 4-hour marathon needs 5:41 min/km, so tempo runs should sit comfortably below that.

Sources & methodology

The formula is arithmetic stated inline above — no external dataset is involved. Everything runs client-side in your browser; nothing is uploaded.

The Running Pace Calculator tool is free, runs locally, and never sends your data to a server. More health calculators at maratool.com.