What pace do I need to run a 4-hour marathon?

To finish a marathon in 4:00:00, you need to run at 5:41 per km (9:09 per mile).

What pace is needed to run a sub-25 minute 5K?

To finish a 5K in under 25 minutes, you need to run faster than 5:00 per km (8:03 per mile).

How long does it take to run a half marathon at 6 min/km?

At 6:00 per km, a half marathon (21.0975 km) takes approximately 2:06:35.

What is a good 10K finish time?

A sub-60 minute 10K (6:00/km or 9:39/mile) is a common recreational goal. Competitive club runners target sub-45 minutes (4:30/km).

Race Time Calculator

Finish time

Pace (min/km)

Pace (min/mile) —

Speed —

Finish time —

About the Race Time Calculator

This calculator works in both directions: enter a finish time to find the required pace, or enter a target pace to predict your finish time. Select your race distance — 5K (5 km), 10K (10 km), Half Marathon (21.0975 km), or Marathon (42.195 km) — then fill in either field and the other updates instantly.

Pace (min/km or min/mile) is the time it takes to cover one kilometre or mile. It is the inverse of speed: a pace of 5:00 min/km equals a speed of 12 km/h. Most road races worldwide use min/km; the US and UK use min/mile. Elite marathon runners finish in under 2:02 (roughly 2:54/km); the average recreational marathon finisher crosses the line in around 4:30 (6:24/km).

Sources & references →

Common Target Times

Sub-25 min 5K	= 5:00 /km · 8:03 /mile
Sub-60 min 10K	= 6:00 /km · 9:39 /mile
Sub-2hr half	= 5:41 /km · 9:09 /mile
Sub-4hr marathon	= 5:41 /km · 9:09 /mile
Boston qualifier (men 18–34)	= 3:00:00 · 4:16 /km
World record marathon	= 2:00:35 · 2:51 /km