How do I find out what pace I need for a goal finish time?

Switch to "Find pace", enter your race distance (or use a preset like Half Marathon) and your goal finish time — the calculator shows the pace per km or mile you'd need to hold to hit that time.

How do I find out how far I can run in a set time at my usual pace?

Switch to "Find distance", enter your usual pace and the time you have available — the calculator shows how far that pace would carry you in that time.

What time format should I use?

Use h:mm:ss for times over an hour (e.g. 1:45:30 for a half marathon), or mm:ss for anything under an hour (e.g. 25:00 for a 5K). Pace fields use min:sec per unit, like 5:00 for a 5-minute kilometer.

Is my pace data sent anywhere?

No. All calculations run locally in your browser with JavaScript — nothing is transmitted or stored.

RUNNING PACE CALCULATOR

Solve for pace, time, or distance — with race-distance presets. Nothing leaves your browser.

Distance (km)

Time (h:mm:ss)

Pace (min/km)

Pace5:00 /km

Time25:00

Speed12.0 km/h

How to use the running pace calculator

1
Choose what to solve for: pace, time, or distance.
2
Enter the other two values — distance in km or miles, time as h:mm:ss, pace as min/km or min/mile.
3
Use a preset button for 5K, 10K, half marathon, or marathon distance.
4
Read the calculated pace, time, and speed.

Questions

How do I find out what pace I need for a goal finish time?: Switch to "Find pace", enter your race distance (or use a preset like Half Marathon) and your goal finish time — the calculator shows the pace per km or mile you'd need to hold to hit that time.
How do I find out how far I can run in a set time at my usual pace?: Switch to "Find distance", enter your usual pace and the time you have available — the calculator shows how far that pace would carry you in that time.
What time format should I use?: Use h:mm:ss for times over an hour (e.g. 1:45:30 for a half marathon), or mm:ss for anything under an hour (e.g. 25:00 for a 5K). Pace fields use min:sec per unit, like 5:00 for a 5-minute kilometer.
Is my pace data sent anywhere?: No. All calculations run locally in your browser with JavaScript — nothing is transmitted or stored.