40*25 = 1000 metres or 1 kilometre.
33 laps * 0.025km = 0.825km
40 lengths of a 25m pool makes 1km
39 lengths of a 50m pool 20 lengths of a 25m pool 43 lengths of a 50yard pool 22 lengths of a 25yard pool
Swimming the 40 foot lengths, it would be 5280/40 or 132. Swimming the 20 foot lengths would be twice that. if you make "circles" around the pool one lap equals 40+20+40+20=120 ft 5280/120 = 44 laps
One lap is usually seen as there-and-back, so a lap is twice the length of the pool. So a lap in a 50 m pool is 100 m. One km is 1000 meters. 1000 / 100 = 1010 laps in a 50 m pool is 1 km.If you want it in lengths, then 1000 / 50 = 2020 lengths makes 1 km.
A regulation pool is 25 yards, so each lane is 25 yards long one way. That means you would go from one end of the pool to the other 40 times.
For 25 meter pool; 40 lengths. Down and back is 50 meters. For 50 meter (olympic size); 20 lengths. Down and back is 100 meters.
72 lengths x 25 meters = 1800 meters = 1.8 kilometers = about 1.12 miles
One mile is 5,280 feet, or 1760 yards, or 1,609.344 meters
In a 25-yard pool, 40 lengths (or 20 laps) equals 1000 yards.
20 lengths of a 20m pool = 20 x 20 = 400m