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
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.
To determine how many laps make a mile in a 20-foot by 40-foot pool, we need to calculate the distance of one lap. The distance around the perimeter of the pool is 20 + 20 + 40 + 40 = 120 feet. Since there are 5,280 feet in a mile, we divide 5,280 by 120 to find that approximately 44 laps make a mile in this pool.
20 lengths of a 20m pool = 20 x 20 = 400m
32 lengths of a standard training pool 25m