SCY vs SCM vs LCM
SCY, SCM, and LCM describe three pool courses. The difference is more than units: pool length changes the number of starts, turns, and underwater opportunities in a race.
Quick answer
| Course | Pool length | Common use |
|---|---|---|
| SCY | 25 yards | U.S. school, college, and club seasons |
| SCM | 25 meters | International short-course competition |
| LCM | 50 meters | Olympic and long-course competition |
Why times do not scale by distance alone
A 100-yard race is physically shorter than a 100-meter race, but pool length adds another variable. Short-course swimmers push off more walls, spend more time underwater, and can carry speed from each turn. That advantage varies by athlete and stroke.
Equivalent distance events
Sprint races usually retain the same number—50, 100, and 200—when moving between yards and meters. Distance events use common pairings:
- 500-yard freestyle ↔ 400-meter freestyle
- 1000-yard freestyle ↔ 800-meter freestyle
- 1650-yard freestyle ↔ 1500-meter freestyle
Which course should I choose?
Use the course printed with the original result. If the meet sheet says a 25-yard pool, choose SCY. A 25-meter pool is SCM, and a 50-meter Olympic-size pool is LCM.
Ready to compare courses? Open the free swim time converter, then use the pace and split tools to plan the next swim.