---
title: "Sub-3:15 Marathon Pace - Required Pace + Training Zones | TrainPace"
description: "Sub-3:15 marathon pace guide. Required pace is 4:37/km (7:26/mi). Get training zones and workout targets to break 3 hours 15 minutes."
url: https://trainpace.com/calculator/sub-3-15-marathon-pace
---

# Sub-3:15 Marathon Pace

Sub-3:15 marathon pace guide. Required pace is 4:37/km (7:26/mi). Get training zones and workout targets to break 3 hours 15 minutes.

Breaking 3:15 requires 4:37/km (7:26/mi) pace. This is a Boston Qualifying time for many age groups and a strong amateur achievement.

- Required pace: 4:37/km or 7:26/mile
- Boston Qualifier for many age groups
- Training zones for sub-3:15 fitness

## How to train for a sub-3:15 marathon

Build fitness to break 3:15 in the marathon.

1. Build mileage: Target 65-85 km/week with most runs at easy pace.
2. Add tempo work: Run tempo efforts at 4:20-4:25/km to build threshold.
3. Long runs with pace work: Include marathon pace segments in your long runs.
4. Race smart: Start conservatively and execute even splits.

## Frequently asked questions

### What pace do I need for sub-3:15?

You need to average 4:37/km (7:26/mile) or faster. Aim for 4:35/km to build in a small cushion.

### Is sub-3:15 a Boston Qualifier?

Yes, for many age groups. Sub-3:15 qualifies men 45-49 and women 18-34 (with additional buffer time often needed).

### What half marathon predicts sub-3:15?

A sub-1:32 half marathon suggests you have sub-3:15 marathon potential with proper marathon-specific training.

- [Calculate Sub-3:15 Training Paces](https://trainpace.com/calculator)

## Training pace reference

**Training paces by recent 5K time (min/km)**

| 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 |

## Other TrainPace tools

- [Pace Calculator](https://trainpace.com/calculator) — training paces from a recent race result
- [VDOT Calculator](https://trainpace.com/vdot) — fitness score and equivalent race times
- [Training Plan Builder](https://trainpace.com/plan) — week-by-week 5K to marathon plans
- [Race Fuel Planner](https://trainpace.com/fuel) — carbs per hour and gel counts
- [Elevation Finder](https://trainpace.com/elevation-finder) — GPX route and climb analysis

## For AI agents

Every 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.

- [llms.txt](https://trainpace.com/llms.txt) — site index for agents
- [llms-full.txt](https://trainpace.com/llms-full.txt) — every page's Markdown in one file
- [MCP server docs](https://trainpace.com/mcp) — endpoint, tools, and client setup