Sub-45 10K Pace

To break 45:00 you need 4:30 per kilometer or 7:15 per mile (13.3 km/h, 8.3 mph). Set your own target below, then take the splits and a pace band to the start line.

10K

4500

Roll a digit ↕

Pace: 4:30 /km
Status: Right on 45 pace

Flick the tape · pull your finger down for fine control

Flick: Spin the tape. It lands on round times and snaps to nearby goals.
Drag down: Keep holding and pull away from the tape for ½, ¼ or fine speed.
Roll: Tap a digit on the bib, then drag it up or down.
Keys: ← → move five seconds, Shift moves a minute.

Jump to a goal

Your pace band

Clock time at every marker. Print it, cut it, tape it to your wrist.

The same pace from start to finish.

10K45:00
2K9:00
4K18:00
6K27:00
8K36:00
Finish45:00

If you can run 45:00

Equivalent race times from the Riegel formula. Longer-race predictions assume your endurance training matches.

5K21:35

10K45:00

Half marathon1:39:17

Marathon3:27:01

Workout paces

Interval targets based on your equivalent 5K effort.

Rep	Target
Mile	6:53–7:07
1000m	4:06–4:19
800m	3:13–3:23
400m	1:31–1:36
200m	0:39–0:44

Sub-45 10K splits

Even-pace clock times for a 45:00 10K. Holding 4:29 per kilometer finishes in 44:50; holding 7:14 per mile finishes in 44:57.

Kilometer splits at 4:30/km
1 km	4:30
2 km	9:00
3 km	13:30
4 km	18:00
5 km	22:30
6 km	27:00
7 km	31:30
8 km	36:00
9 km	40:30
Finish	45:00

Mile splits at 7:15/mi
Mile 1	7:15
Mile 2	14:29
Mile 3	21:44
Mile 4	28:58
Mile 5	36:13
Mile 6	43:27
Finish (6.2 mi)	45:00

Race times that go with a sub-45 10K

Riegel-formula equivalents for a 45:00 10K. If your weekly mileage is modest, aim for about 21:17 in the 5K rather than 21:35 before committing to this goal.

5K21:35

half marathon1:39:17

marathon3:27:01

Frequently asked questions

What pace is a 45 minute 10K?

A 45:00 10K averages 4:30 per kilometer or 7:15 per mile. Holding 4:29 per kilometer finishes in 44:50, and 7:14 per mile finishes in 44:57.

What 5K time do I need for a sub-45 10K?

The Riegel formula lines up a 45:00 10K with about 21:35 for the 5K. A more conservative estimate for runners without high weekly mileage is about 21:17.

What is the halfway split for a sub-45 10K?

At even pace the halfway split is 22:30. Many runners aim to pass halfway a few seconds slower and finish with a small negative split.