How many laps is a mile?
How many laps is a mile? In a 25 yard pool a mile is 70.4 lengths, in a 25 meter pool 64.37 lengths and in a 50 meter pool 32.19. On a 400 m track it is 4.02 laps in lane 1. Enter any distance to count lengths or laps.
Example: Where: Swimming pool · Distance 1 · Unit: miles · Pool length: 25 yards (22.86 m) → Laps: 70.4 (round up to 71) lengths of 22.86 m (35.2 round trips). Source: World Aquatics (FINA), Swimming Pool Certificate Guide (February 2020), FR 2.1 Length: 25.000 / 50.000 metres (read 10.10.2026). Updated: .
How it is calculated
Lengths = distance ÷ pool length. A mile is 1,609.344 m (NIST), which is 1,760 yards. In a 25 yard pool that is 1,760 ÷ 25 = 70.4 lengths; in a 25 m pool, 64.37; in a 50 m pool, 32.19. Swimmers often say “lap” for one length, while others mean there and back – the calculator shows both.
Lengths for common distances
| Distance | 25 yd pool | 25 m pool | 50 m pool |
|---|---|---|---|
| 500 yd | 20 | 18.29 | 9.14 |
| 1 mile | 70.4 | 64.37 | 32.19 |
| 1650 yd | 66 | 60.35 | 30.18 |
| 1 km | 43.74 | 40 | 20 |
Competition pools are 25.000 m or 50.000 m long under World Aquatics rule FR 2.1; a 25 yard pool is 22.86 m (1 yard = 0.9144 m, NIST). When a distance does not divide evenly, the calculator also shows the next whole number.
Laps on a running track
A standard running track is 400 m long, measured 0.30 m outward from the kerb in lane 1 (World Athletics TR 14). A mile is therefore 4.02 laps in lane 1, and 1 km is 2.5 laps. Each lane is 1.22 m wide and outer lanes are measured 0.20 m from the line, so a lap gets longer on the bends: lane 2 is 407.04 m and lane 8 is 453.03 m. A mile in lane 8 is only 3.55 laps.
For your pace per 100, use the swim pace calculator; for running, the running pace calculator.
Frequently asked questions
How many laps is a mile in a 25 yard pool?
70.4 lengths (1,760 yards ÷ 25), or 35.2 round trips.
How many laps is a mile in an Olympic pool?
In a 50 m pool a mile is 32.19 lengths, about 16 round trips.
How many laps is a mile on a track?
On a 400 m track, 4.02 laps in lane 1 (1,609.344 ÷ 400). In lane 2 it is 3.95 laps because a lap there is 407.04 m.
Is a lap one length or there and back?
It depends on who you ask. The calculator gives lengths (one pool length) and round trips (two lengths).
How many lengths is 1650 yards?
66 lengths in a 25 yard pool.
Sources and legal basis
- World Aquatics (FINA), Swimming Pool Certificate Guide (February 2020), FR 2.1 Length: 25.000 / 50.000 metres (read 10.10.2026)
- World Athletics, Technical Rules C2.1 (in force from 1 November 2019), TR 14.1 standard running track 400m; 14.2 measured 0.30m outward from the kerb; 14.4 lane width 1.22m ± 0.01m, remaining lanes measured 0.20m from the outer edges of the lines (read 10.10.2026)
- NIST SP 811, Appendix B.8: 1 mile = 1609.344 m; 1 yard = 0.9144 m (read 10.10.2026)
As of: · Editorial policy
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