Half marathon pace calculator

Put in your half marathon target to get the steady pace to hold, plus matching times over other races.

Your details

Half marathon pace for 2:00:00

9:09

minutes per mile

Per kilometre5:41
Speed6.6 mph (10.5 km/h)
Even splits25% in 30:00, 50% in 1:00:00, 75% in 1:30:00
Same fitness over other races1 mile 7:51; 5K 26:05; 10K 54:23; marathon 4:10:12
Training paces per mile (VDOT 36.5)easy 10:08 to 12:05; tempo 8:50 to 9:15; intervals 7:58 to 8:18
Age gradeadd your age and sex to see it

The other times use Riegel's formula, which assumes you have trained for the longer distance. Most people run the marathon a little slower than predicted.

The working

Two hours for 21.1 km

7,200 seconds ÷ 21.0975 km is 5:41 per kilometre, or 9:09 per mile. The same effort predicts 54:23 for 10K and 4:10:12 for a marathon, if you train for it.

On the day

Pacing a half

The first 5 km should feel too easy
Take a drink at the stations even when you do not feel thirsty
Many people fuel with carbs from about 45 minutes
Miles 10 to 12 are where the race is won or lost

Sub two

The famous target

Finish	Per mile	Per km
2:30:00	11:27	7:07
2:15:00	10:18	6:24
2:00:00	9:09	5:41
1:45:00	8:01	4:59

Read with care

What this cannot tell you

WeatherWind and heat need a slower plan.
CourseCheck the elevation before you pick a pace.
NigglesAn injury that alters your stride is a reason to drop out.

Questions

Common questions

What pace is a 2 hour half marathon?

9:09 per mile, or 5:41 per kilometre.

How long is a half marathon?

13.1 miles, or 21.1 km.

Should I run the whole half?

Run walk is a perfectly good way to finish, and often quicker than running until you stop.

Sources

Last checked 21 October 2026. Spotted something wrong? Tell us and we will fix it.

Before you push on

New to exercise, or got a heart, lung or joint condition? Have a word with your GP or practice nurse first. Stop and get help if you feel chest pain, faintness or unusual breathlessness, and call 999 if it is severe.