Half Marathon Pace Calculator
13.1 miles

Enter your expected pace per mile or km to see your finish time, every mile split, and a full pace comparison table.

13.1 mi / 21.1 km · Mile-by-mile splits · ±15s & ±30s comparison
Expected Pace
:

At 11:51/mi pace

5K36:49
10K1:13:38
Half Marathon finish time2:35:21
Marathon (projected)5:10:42

Splits at 11:51/mi

Distance 11:21/mi 11:36/mi 11:51/mi ★ 12:06/mi 12:21/mi
1 mi 11:21 11:36 11:51 12:06 12:21
2 mi 22:42 23:12 23:42 24:12 24:42
3 mi 34:03 34:48 35:33 36:18 37:03
5K 35:15 36:02 36:48 37:35 38:22
4 mi 45:24 46:24 47:24 48:24 49:24
5 mi 56:45 58:00 59:15 1:00:30 1:01:45
6 mi 1:08:06 1:09:36 1:11:06 1:12:36 1:14:06
10K 1:10:31 1:12:04 1:13:37 1:15:11 1:16:44
7 mi 1:19:27 1:21:12 1:22:57 1:24:42 1:26:27
8 mi 1:30:48 1:32:48 1:34:48 1:36:48 1:38:48
9 mi 1:42:09 1:44:24 1:46:39 1:48:54 1:51:09
10 mi 1:53:30 1:56:00 1:58:30 2:01:00 2:03:30
11 mi 2:04:51 2:07:36 2:10:21 2:13:06 2:15:51
12 mi 2:16:12 2:19:12 2:22:12 2:25:12 2:28:12
13 mi 2:27:33 2:30:48 2:34:03 2:37:18 2:40:33
Half Marathon 13.1 2:28:47 2:32:04 2:35:20 2:38:37 2:41:54
← Swipe to see all paces →

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Race-Specific Pace Calculators

Dedicated split tables and pace charts for every major race distance.

5K
5K Pace Calculator
Splits and pace chart for 3.1 miles
10K
10K Pace Calculator
Splits and pace chart for 6.2 miles
13.1
Half Marathon Calculator
Splits and pace chart for 13.1 miles
26.2
Marathon Pace Calculator
Splits and pace chart for 26.2 miles

How to Use This Calculator

Enter your expected pace per mile or kilometer in the form above and hit Calculate. The splits table shows your cumulative time at every mile marker from mile 1 to 13.1, with your target pace in the center column highlighted. The columns on either side show times at 15 and 30 seconds per mile faster and slower — useful for seeing exactly how a small pace change affects your finish time.

Key race checkpoints — 5K, 10K, and the half marathon finish — appear in bold rows so you can find your split targets at a glance. Use the miles/km toggle to switch units without re-entering your pace.

To work backwards from a goal finish time: divide your goal in minutes by 13.1 (miles) or 21.1 (kilometers). For example, a 2-hour half marathon is 120 ÷ 13.1 = 9:09 per mile.

The sub-2:00 goal. A 9:09/mile or 5:41/km pace gives you a 1:59:58 half marathon — just under two hours. It's the most popular recreational half marathon goal, and happens to be the same pace required for a 4:00:00 marathon.

Half Marathon Pace & Finish Time Chart

Pace / mi Half Marathon Finish 10K Split Goal
4:00/mi 52:26 24:51 Sub-1:15
4:15/mi 55:43 26:24 Sub-1:15
4:30/mi 59:00 27:58 Sub-1:15
4:45/mi 1:02:16 29:31 Sub-1:15
5:00/mi 1:05:33 31:04 Sub-1:15
5:15/mi 1:08:49 32:37 Sub-1:15
5:30/mi 1:12:06 34:11 Sub-1:15
5:45/mi 1:15:23 35:44 Sub-1:30
6:00/mi 1:18:39 37:17 Sub-1:30
6:15/mi 1:21:56 38:50 Sub-1:30
6:30/mi 1:25:13 40:23 Sub-1:30
6:45/mi 1:28:29 41:57 Sub-1:30
7:00/mi 1:31:46 43:30 Sub-1:45
7:15/mi 1:35:03 45:03 Sub-1:45
7:30/mi 1:38:19 46:36 Sub-1:45
7:45/mi 1:41:36 48:09 Sub-1:45
8:00/mi 1:44:53 49:43 Sub-1:45
8:15/mi 1:48:09 51:16 Sub-2:00
8:30/mi 1:51:26 52:49 Sub-2:00
8:45/mi 1:54:42 54:22 Sub-2:00
9:00/mi 1:57:59 55:55 Sub-2:00
9:15/mi 2:01:16 57:29 Sub-2:15
9:30/mi 2:04:32 59:02 Sub-2:15
9:45/mi 2:07:49 1:00:35 Sub-2:15
10:00/mi 2:11:06 1:02:08 Sub-2:15
10:15/mi 2:14:22 1:03:41 Sub-2:15
10:30/mi 2:17:39 1:05:15 Sub-2:30
10:45/mi 2:20:56 1:06:48 Sub-2:30
11:00/mi 2:24:12 1:08:21 Sub-2:30
11:15/mi 2:27:29 1:09:54 Sub-2:30
11:30/mi 2:30:45 1:11:27 Sub-3:00
11:45/mi 2:34:02 1:13:01 Sub-3:00
12:00/mi 2:37:19 1:14:34 Sub-3:00
12:15/mi 2:40:35 1:16:07 Sub-3:00
12:30/mi 2:43:52 1:17:40 Sub-3:00
12:45/mi 2:47:09 1:19:13 Sub-3:00
13:00/mi 2:50:25 1:20:47 Sub-3:00
13:15/mi 2:53:42 1:22:20 Sub-3:00
13:30/mi 2:56:59 1:23:53 Sub-3:00
13:45/mi 3:00:15 1:25:26
14:00/mi 3:03:32 1:27:00
14:15/mi 3:06:49 1:28:33
14:30/mi 3:10:05 1:30:06
14:45/mi 3:13:22 1:31:39
15:00/mi 3:16:38 1:33:12

Half Marathon Pace FAQ

Common questions about half marathon pacing, splits, and race-day strategy.