Ready to Swim a few laps?
Here are some lengths you should know!

100 meters = 110 yards
400 meters = 440 yards (1/4 mile)
800 meters = 880 yards (1/2 mile)
1,600 meters = 1,760 yards (1 mile)

In our 25-meter pool:
1/2 mile is 32 lengths (800 meters)
1 mile is 64 lengths (1,600 meters)

In a 25-yard pool:
1/2 mile is about 35 lengths (875 yards)
1 mile is about 70 lengths (1,750 yards)