Running
How many miles is a marathon?
The short answer, why the distance is 26.2, the conversion table, and what a good marathon time actually looks like, plus how to pace it.
A marathon is 26.219 miles, exactly 42.195 kilometres. Because one kilometre equals 0.621 miles, you multiply 42.195 by 0.621 to get 26.219 miles. Most people round it to 26.2 miles, and the difference is only about 30 metres, so for training and racing the two are interchangeable.
The conversion factor to remember is 1 kilometre = 0.621 miles, and going the other way, 1 mile = 1.609 kilometres. Every race distance below is just that same factor applied.
Why a marathon is 26.2 miles
The distance is a historical accident, not a round number. Early marathons varied in length, but the 1908 London Olympics set the course from Windsor Castle to the royal box inside White City Stadium: a distance of 26 miles and 385 yards, or 42.195 kilometres. The IAAF adopted that exact figure as the standard in 1921, and it has been the official marathon distance worldwide ever since. That is why 26.2 miles is such an oddly specific number: it traces back to a single royal finish line over a century ago.
Race distances in miles and kilometres
| Race | Kilometres | Miles |
|---|---|---|
| 5K | 5.000 | 3.107 |
| 10K | 10.000 | 6.214 |
| 15K | 15.000 | 9.321 |
| Half marathon | 21.098 | 13.109 |
| Marathon | 42.195 | 26.219 |
Marathon splits in miles
Thinking in checkpoints makes 26.2 miles far less daunting. These are the landmark distances runners pace to, with the goal-time pacing you need to hit them for a sub-4:00 finish.
| Checkpoint | Miles | Sub-4:00 split |
|---|---|---|
| 10K | 6.21 | 0:56:52 |
| Halfway | 13.11 | 2:00:00 |
| 30K | 18.64 | 2:50:36 |
| 20 miles | 20.00 | 3:03:04 |
| Finish | 26.22 | 4:00:00 |
Typical marathon finish times by level
There is no single "normal" marathon time. It depends on training, age, and terrain, and these ranges give you an honest sense of where different levels land over the 26.219 miles.
| Level | Finish time | Pace / mile |
|---|---|---|
| First-timer | 4:30–5:30 | 10:18–12:35 |
| Recreational runner | 3:45–4:30 | 8:35–10:18 |
| Trained runner | 3:00–3:45 | 6:52–8:35 |
| Competitive amateur | 2:30–3:00 | 5:44–6:52 |
| Elite | Under 2:10 | Under 4:58 |
Turn your goal time into a pace
Once you have a target marathon time, the useful number is the pace you must hold for all 26.219 miles. Enter your distance and goal time into the pace calculator to get your exact pace per mile and per kilometre, plus a split table to pace the race. To convert any distance between miles and kilometres, use the distance converter. For a structured build to the start line, explore Gritup for running.
Frequently asked
How many miles is a marathon?
A marathon is 26.219 miles, which is 42.195 kilometres. People usually round it to 26.2 miles. Because one kilometre equals 0.621 miles, you multiply 42.195 by 0.621 to get 26.219 miles.
Why is a marathon 26.2 miles?
The distance was standardised at the 1908 London Olympics. The course ran from Windsor Castle to the royal box at the White City Stadium, which measured 26 miles 385 yards, or 42.195 kilometres. The IAAF fixed that exact figure as the official marathon distance in 1921, and it has stood ever since.
How long does it take to run a marathon?
Most first-time marathoners finish in 4:30 to 5:30. A regular recreational runner lands around 3:45 to 4:30, a trained runner around 3:00 to 3:45, and competitive amateurs under 3:00. The elite world record is just over 2:00.
What pace do I need for a sub-4-hour marathon?
A sub-4:00 marathon needs an average pace of about 5:41 per kilometre or 9:09 per mile, held for all 26.219 miles. Use the pace calculator to turn any goal time into an exact per-mile and per-kilometre target with a full split table.
How many steps is a marathon?
A marathon is roughly 50,000 to 66,000 steps depending on your height and running stride. Taller runners with a longer stride take fewer steps. A running stride of about 1 metre puts you near 42,000 steps for the 42.195 kilometres.
From 26.2 miles to the finish line
Know the distance. Now train for it.
Gritup builds a week-by-week marathon plan around your current fitness and goal time: long runs, tempo work, and a taper that peaks you on race day.