# Marathon Pace Calculator Calculate the pace per mile and per km needed for your marathon target time. Get mile splits, half marathon split, and average speed for 26.2 miles. ## What this calculates Planning your marathon strategy starts with knowing your required pace. Enter your target finish time to see exactly how fast you need to run each mile and kilometer, plus your even-split half marathon time. ## Inputs - **Calculate From** — options: Target finish time, Known pace - **Hours** — min 0, max 12 — Finish time hours (or leave 0) - **Minutes** — min 0, max 59 — Finish time minutes - **Seconds** — min 0, max 59 — Finish time seconds ## Outputs - **Finish Time** — formatted as text — Total marathon finish time (26.2 mi / 42.195 km) - **Pace per Mile** — formatted as text — Required pace per mile - **Pace per Km** — formatted as text — Required pace per kilometer - **Half Marathon Split** — formatted as text — Even-split time at the halfway mark (13.1 mi) - **Average Speed** — Average running speed in miles per hour ## Details A marathon is officially 26.2188 miles (42.195 km). The pace needed to finish varies dramatically across ability levels. Here are some common benchmarks: - **Sub-3:00 marathon**: 6:52 /mi (4:16 /km) - **Sub-3:30 marathon**: 8:01 /mi (4:59 /km) - **Sub-4:00 marathon**: 9:09 /mi (5:41 /km) - **Sub-4:30 marathon**: 10:18 /mi (6:24 /km) - **Sub-5:00 marathon**: 11:27 /mi (7:07 /km) Most experienced runners aim for an even split or slight negative split (running the second half slightly faster than the first). Going out too fast is the most common mistake in marathon racing. If your first 10K is more than 30 seconds per mile faster than your goal pace, you are likely setting up for a painful final 10K. The half marathon split shown assumes perfectly even pacing. In practice, adding 1-2 minutes to your first half gives you a small cushion for the natural slowdown that occurs after mile 20 (the so-called "wall"). Training paces for marathon preparation typically include easy runs at 60-90 seconds slower than goal pace, marathon-pace long runs, and tempo work at 15-30 seconds faster than goal pace. A well-structured 16-20 week training plan builds gradually to peak mileage about 3 weeks before race day. ## Frequently Asked Questions **Q: What is a good marathon time for a beginner?** A: The average first-time marathon finish is around 4:30-5:00, which works out to about 10:18-11:27 per mile. A good first marathon goal for someone who has been running consistently for at least 6 months is to simply finish. Once you have one marathon under your belt, you will have a much better sense of what pace you can sustain for 26.2 miles. **Q: Should I run even splits or negative splits?** A: Research on marathon performance consistently shows that even pacing or slight negative splits (running the second half 1-2 minutes faster) produce the best results. Positive splits of more than 3-5 minutes typically indicate going out too fast. The key is restraint in the first half. Practice running goal pace during your long runs so it feels natural on race day. **Q: How do I adjust my pace for hills?** A: On uphill sections, slow your pace by 15-30 seconds per mile to maintain the same effort level. On downhill sections, you might naturally speed up by 10-20 seconds per mile. The goal is consistent effort, not consistent pace. If your marathon course has significant elevation changes, look at the course profile and plan your effort accordingly rather than trying to hold a rigid pace throughout. **Q: What pace should I train at?** A: Most of your training (about 80% of weekly mileage) should be at easy pace, roughly 60-90 seconds per mile slower than your goal marathon pace. One weekly tempo or marathon-pace workout at your target pace builds race-specific fitness. Speed work at 30-60 seconds faster than marathon pace develops the speed reserve that makes marathon pace feel more sustainable. --- Source: https://vastcalc.com/calculators/health/marathon-pace Category: Health & Fitness Last updated: 2026-04-08