MARATHON GOAL PACE

3:15 Marathon Pace

The exact even pace, per-kilometer splits and checkpoint times you need to run a 3:15 marathon — plus fueling and equivalent race times. Free.

Required even pace
4:37
per mile 7:26 · speed 13.0 km/h · finish 3:15
5K split
23:06
Halfway
1:37:30
30K split
2:18:39
Want a different target? Use the full pace calculator & race predictor.
CHECKPOINT SPLITS
DistanceTime at even pace
5K23:06
10K46:13
15K1:09:19
Half1:37:30
25K1:55:32
30K2:18:39
35K2:41:45
40K3:04:51
Finish3:15:00

⚡ Fueling for a 3:15 marathon

At roughly 3.2 hours of running, aim for about 60–90 g of carbohydrate per hour (≈ 195–292 g total) and 300–800 mg sodium per hour. Test your exact fueling in training — never race on something new.

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EQUIVALENT RACE TIMES
5K
20:20
10K
42:23
Half
1:33:32
Marathon
3:15
Equivalent performances at the same fitness (Riegel model). Useful for pacing tune-up races.
Full kilometer-by-kilometer split table ▾
KMCumulativePace/km
1 km4:374:37
2 km9:154:37
3 km13:524:37
4 km18:294:37
5 km23:064:37
6 km27:444:37
7 km32:214:37
8 km36:584:37
9 km41:364:37
10 km46:134:37
11 km50:504:37
12 km55:274:37
13 km1:00:054:37
14 km1:04:424:37
15 km1:09:194:37
16 km1:13:574:37
17 km1:18:344:37
18 km1:23:114:37
19 km1:27:484:37
20 km1:32:264:37
21 km1:37:034:37
22 km1:41:404:37
23 km1:46:184:37
24 km1:50:554:37
25 km1:55:324:37
26 km2:00:094:37
27 km2:04:474:37
28 km2:09:244:37
29 km2:14:014:37
30 km2:18:394:37
31 km2:23:164:37
32 km2:27:534:37
33 km2:32:304:37
34 km2:37:084:37
35 km2:41:454:37
36 km2:46:224:37
37 km2:51:004:37
38 km2:55:374:37
39 km3:00:144:37
40 km3:04:514:37
41 km3:09:294:37
42 km3:14:064:37
42.195 km3:15:004:37

How to actually run a 3:15 marathon

The pace above assumes an even effort. In a study of over 4 million race records, 28% of men and 17% of women slowed dramatically in the second half — "hitting the wall" — almost always because they banked time early. Aim to reach halfway (1:37:30) on schedule or a few seconds behind, then hold. A flat, even or slight negative split is how most runners hit 3:15.

What pace is a 3:15 marathon?

A 3:15 marathon requires an even pace of 4:37 per kilometer (7:26 per mile), about 13.0 km/h. Over 42.195 km that adds up to exactly 3:15.

What are the 5K, 10K and halfway splits for a 3:15 marathon?

At even pace you pass 5K in 23:06, 10K in 46:13, and the halfway point (21.1 km) in 1:37:30. Reaching halfway meaningfully faster than 1:37:30 is the classic positive-split mistake that causes late-race slowdown.

How many carbohydrates do I need for a 3:15 marathon?

For a run of about 3.2 hours, sports-nutrition consensus is roughly 60–90 g of carbohydrate per hour — around 195–292 g total — plus 300–800 mg of sodium per hour depending on sweat rate. Practice your exact fueling in training; never try anything new on race day.

←3:00 marathon pace →3:30 marathon pace ≡All marathon goal times ⏱Pace calculator & predictor

Times are mathematical even-pace targets, not a guarantee. Real results vary with course, weather, fitness and fueling. Nutrition guidance is general — consult a professional for individual needs.