How do I convert between min/km and min/mile?

Multiply min/km by 1.609 to get min/mile. So 5:00 /km = 8:03 /mile. The calculator shows both.

What's a good 5K pace?

Highly variable — recreational runners average 6:00–7:00 /km (30:00–35:00 5K). Sub-25:00 (5:00 /km) is intermediate. Sub-20:00 (4:00 /km) is competitive amateur. Elites run sub-13:00 (2:36 /km).

Running Pace Calculator — embedded

Result

Pace per km

5:00 /km

8:03 /mi · 12.00 km/h · 7.46 mph

Projected 1 km5:00
Projected 1 mi8:03
Projected 5 km25:00
Projected 10 km50:00
Projected Half-marathon (21.1 km)1:45:29
Projected Marathon (42.2 km)3:30:59

Race-distance splits at this pace

Cumulative time at each kilometre and at each mile, assuming you hold the entered pace for the full distance.

5K (5.00 km · 3.11 mi)

Race pace splits: cumulative time at each distance mark.
Mark	at km	at mile
1	5:00	8:03
2	10:00	16:06
3	15:00	24:08
4	20:00	—
5	25:00	—
Total	25:00	25:00

10K (10.00 km · 6.21 mi)

Race pace splits: cumulative time at each distance mark.
Mark	at km	at mile
1	5:00	8:03
2	10:00	16:06
3	15:00	24:08
4	20:00	32:11
5	25:00	40:14
6	30:00	48:17
7	35:00	—
8	40:00	—
9	45:00	—
10	50:00	—
Total	50:00	50:00

Half-marathon (21.10 km · 13.11 mi)

Race pace splits: cumulative time at each distance mark.
Mark	at km	at mile
1	5:00	8:03
2	10:00	16:06
3	15:00	24:08
4	20:00	32:11
5	25:00	40:14
6	30:00	48:17
7	35:00	56:20
8	40:00	1:04:22
9	45:00	1:12:25
10	50:00	1:20:28
11	55:00	1:28:31
12	1:00:00	1:36:34
13	1:05:00	1:44:36
14	1:10:00	—
15	1:15:00	—
16	1:20:00	—
17	1:25:00	—
18	1:30:00	—
19	1:35:00	—
20	1:40:00	—
21	1:45:00	—
Total	1:45:29	1:45:29

Marathon (42.195 km · 26.22 mi)

Race pace splits: cumulative time at each distance mark.
Mark	at km	at mile
1	5:00	8:03
2	10:00	16:06
3	15:00	24:08
4	20:00	32:11
5	25:00	40:14
6	30:00	48:17
7	35:00	56:20
8	40:00	1:04:22
9	45:00	1:12:25
10	50:00	1:20:28
11	55:00	1:28:31
12	1:00:00	1:36:34
13	1:05:00	1:44:36
14	1:10:00	1:52:39
15	1:15:00	2:00:42
16	1:20:00	2:08:45
17	1:25:00	2:16:48
18	1:30:00	2:24:50
19	1:35:00	2:32:53
20	1:40:00	2:40:56
21	1:45:00	2:48:59
22	1:50:00	2:57:02
23	1:55:00	3:05:04
24	2:00:00	3:13:07
25	2:05:00	3:21:10
26	2:10:00	3:29:13
27	2:15:00	—
28	2:20:00	—
29	2:25:00	—
30	2:30:00	—
31	2:35:00	—
32	2:40:00	—
33	2:45:00	—
34	2:50:00	—
35	2:55:00	—
36	3:00:00	—
37	3:05:00	—
38	3:10:00	—
39	3:15:00	—
40	3:20:00	—
41	3:25:00	—
42	3:30:00	—
Total	3:30:59	3:30:59

How to use this calculator

Enter the distance you ran and how long it took.
Pace shows in both per-km and per-mile, plus speed in km/h and mph.
Projected splits assume you hold this pace — in reality marathon pace ≈ 10K pace + 30 s/km.
For an interval target (e.g. 400 m at 4:00 km), divide the per-km pace.

About this tool

Pace is how runners actually talk: "I ran a 4:30 km" means much more than "I ran 13.3 km/h." This calculator converts between distance, time, and pace — and projects what your race times would be at that pace, from 1 km up to a full marathon. Useful for setting realistic goals (if you can hold a 5:00 km for 5 km, can you do it for 10? — usually no, marathon pace is about 30 sec/km slower than 10 km pace) and for designing interval workouts ("I need to do 8×400 m at 4:00 km pace").

Frequently asked

The projection is a "naïve" linear extrapolation. Real-world fade from glycogen depletion, heat, and form breakdown adds 5–15 % to marathon time vs. predicted from a 10K. Use Riegel's formula for a more realistic estimate at long distances.