Sub-3:30 marathon pace guide. Required pace is 4:59/km (8:02/mi). Get training zones and pacing strategy to break 3 hours 30 minutes.
Breaking 3:30 requires just under 5:00/km (8:02/mi) pace. This is a popular goal and Boston Qualifier for several age groups.
Build the endurance and speed to break 3:30.
You need to average 4:59/km (8:02/mile). Aim for 4:57/km to have a small buffer.
Most runners need 50-70 km (30-45 miles) per week minimum. Quality matters as much as quantity.
A sub-1:40 half marathon indicates sub-3:30 potential. A 1:35-1:38 half gives you a comfortable buffer.
| 5K time | VDOT | Easy | Marathon | Threshold | Interval | Rep |
|---|---|---|---|---|---|---|
| 15:00 | 69.6 | 3:45–4:30 | 3:23–3:42 | 3:15 | 2:56 | 2:32 |
| 17:30 | 58.2 | 4:20–5:12 | 3:54–4:17 | 3:46 | 3:23 | 2:56 |
| 20:00 | 49.8 | 4:54–5:53 | 4:26–4:51 | 4:16 | 3:51 | 3:19 |
| 22:30 | 43.4 | 5:29–6:34 | 4:57–5:25 | 4:46 | 4:18 | 3:43 |
| 25:00 | 38.3 | 6:03–7:14 | 5:28–5:59 | 5:16 | 4:45 | 4:06 |
| 27:30 | 34.2 | 6:37–7:53 | 5:59–6:33 | 5:46 | 5:13 | 4:30 |
| 30:00 | 30.8 | 7:11–8:32 | 6:30–7:06 | 6:16 | 5:40 | 4:54 |
| 32:30 | 28.0 | 7:44–9:10 | 7:01–7:39 | 6:46 | 6:07 | 5:17 |
| 35:00 | 25.6 | 8:17–9:48 | 7:31–8:12 | 7:15 | 6:34 | 5:41 |
The numbers on this page are computed with the same code as the TrainPace calculators, from these published methods. They are training guidance, not medical advice.
Every public page on this site has a Markdown mirror at the same path with a .md suffix (for example /calculator.md), and honors an Accept: text/markdown request header on the HTML URL. The calculations here are also available as callable tools through a free public MCP server — no account or API key.