# How long do I have to swim to lose 1 pound (lb)?

## It would take 2-8 hours of swimming to lose 1 pound.

The time depends on how much you weigh and how hard you swim (leisurely or lap swimming). Below is an estimate of how long you’ll have to swim to burn 3500 calories, the number of calories in one pound of fat.

### Swimming leisurely

• If you weigh 150 lbs, you’ll have to swim for approximately 8 hours to lose 1 lb.
• If you weigh 200 lbs, you’ll have to swim for approximately 6 hours to lose 1 lb.
• If you weigh 250 lbs, you’ll have to swim for approximately 5 hours to lose 1 lb.
• If you weigh 300 lbs, you’ll have to swim for approximately 4 hours to lose 1 lb.
• If you weigh 350 lbs, you’ll have to swim for approximately 3.5 hours to lose 1 lb.
• If you weigh 400 lbs, you’ll have to swim for approximately 3 hours to lose 1 lb.

### Swimming laps (at a pace of 50 yards per minute)

• If you weigh 150 lbs, you’ll have to swim for approximately 6 hours to lose 1 lb.
• If you weigh 200 lbs, you’ll have to swim for approximately 4.5 hours to lose 1 lb.
• If you weigh 250 lbs, you’ll have to swim for approximately 3.5 hours to lose 1 lb.
• If you weigh 300 lbs, you’ll have to swim for approximately 3 hours to lose 1 lb.
• If you weigh 350 lbs, you’ll have to swim for approximately 2.5 hours to lose 1 lb.
• If you weigh 400 lbs, you’ll have to swim for approximately 2 hours to lose 1 lb.
Sources:
Ainsworth BE, Haskell WL, Whitt MC, et al. Compendium of physical activities: an update of activity codes and MET intensities. Med. Sci. Sports Exerc., Vol. 32, No. 9, Suppl., pp. S498–S516, 2000.
Calorie calculations from equation: (METs x 3.5 x body weight in kg)/200 = calories/minute