PR Nerd
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Running Calculators

Free tools built on real exercise physiology. No account required.

Your recent race

Hours

Minutes

Seconds

🏃

Enter your race time above to see your paces

Reference

Running Pace Chart

Finish times by pace — 5:00 to 12:00 per mile

Pace/Mile
5K
10K
Half Marathon
Marathon
5:00/mi
15:32
31:04
1:05:33
2:11:06
5:15/mi
16:19
32:37
1:08:49
2:17:39
5:30/mi
17:05
34:11
1:12:06
2:24:12
5:45/mi
17:52
35:44
1:15:23
2:30:45
6:00/mi
18:38
37:17
1:18:39
2:37:19
6:15/mi
19:25
38:50
1:21:56
2:43:52
6:30/mi
20:12
40:23
1:25:13
2:50:25
6:45/mi
20:58
41:57
1:28:29
2:56:59
7:00/mi
21:45
43:30
1:31:46
3:03:32
7:15/mi
22:31
45:03
1:35:03
3:10:05
7:30/mi
23:18
46:36
1:38:19
3:16:38
7:45/mi
24:05
48:09
1:41:36
3:23:12
8:00/mi
24:51
49:43
1:44:53
3:29:45
8:15/mi
25:38
51:16
1:48:09
3:36:18
8:30/mi
26:25
52:49
1:51:26
3:42:52
8:45/mi
27:11
54:22
1:54:42
3:49:25
9:00/mi
27:58
55:55
1:57:59
3:55:58
9:15/mi
28:44
57:29
2:01:16
4:02:31
9:30/mi
29:31
59:02
2:04:32
4:09:05
9:45/mi
30:18
1:00:35
2:07:49
4:15:38
10:00/mi
31:04
1:02:08
2:11:06
4:22:11
10:15/mi
31:51
1:03:41
2:14:22
4:28:45
10:30/mi
32:37
1:05:15
2:17:39
4:35:18
10:45/mi
33:24
1:06:48
2:20:56
4:41:51
11:00/mi
34:11
1:08:21
2:24:12
4:48:24
11:15/mi
34:57
1:09:54
2:27:29
4:54:58
11:30/mi
35:44
1:11:27
2:30:45
5:01:31
11:45/mi
36:30
1:13:01
2:34:02
5:08:04
12:00/mi
37:17
1:14:34
2:37:19
5:14:38

Times calculated for standard race distances. Half marathon = 13.1 miles, Marathon = 26.2 miles.

Zone 2 Calculator

Find your actual zone 2 heart rate

Estimated max HR: 185 bpm

Your zone 2 range
111 to 130 bpm

Based on estimated max heart rate (220 minus age)

All training zones
Zone 1Recovery
93 to 111
Zone 2Aerobic BaseYour target
111 to 130
Zone 3Tempo
130 to 148
Zone 4Threshold
148 to 167
Zone 5Max Effort
167 to 185

Heart rate zones are estimates. The talk test is often more reliable than any formula. If you can hold a full conversation you are in zone 2 regardless of what your watch says.