Sub-3:45 Marathon Pace

Sub-3:45 marathon pace guide. Required pace is 5:20/km (8:35/mi). Get training zones and strategy to break 3 hours 45 minutes.

Breaking 3:45 requires 5:20/km (8:35/mi) pace. This is an achievable goal for dedicated recreational runners.

Required pace: 5:20/km or 8:35/mile
Achievable intermediate goal
Stepping stone to sub-3:30

How to run a sub-3:45 marathon

Training approach to break 3:45 in the marathon.

Build base: Run 40-60 km/week consistently for 3-4 months.
Long runs: Progress to 28-32 km long runs.
Quality sessions: Include tempo and marathon pace work weekly.
Race execution: Start at goal pace, fuel consistently, finish strong.

Frequently asked questions

What pace for sub-3:45 marathon?

Average 5:20/km (8:35/mile) or faster. Target 5:18/km for a small buffer.

What half marathon time predicts sub-3:45?

A sub-1:47 half marathon suggests sub-3:45 potential. Around 1:42-1:45 gives comfortable fitness.

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

More pacing guides

Method and sources

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.

Daniels, J. Daniels' Running Formula. Human Kinetics — VDOT, training zones, and equivalent race times.
Daniels, J. & Gilbert, J. (1979). Oxygen Power: Performance Tables for Distance Runners — the oxygen-cost and %VO2max equations behind VDOT.

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