It depends on the swimmer’s age and gender. 😊
For example, a 35.00 in the 50 LCM Freestyle is:
- 10-year-old boy: A
- 10-year-old girl: AA
- 11-year-old boy: BB
- 11-year-old girl: BB
- 12–13 boys: B
- 12–13 girls: BB
- 14–18 boys: Below B
- 14–18 girls: B
AAAA corresponds to 98%, AAA to 94%, AA to 92%, A to 85%, B to 45%, and BB to 65%.
You can look up the full USA Swimming Motivational Time Standards here:
https://swimstandards.com/national/age-group-motivational-times
Or download the Swim Standards app to check your own personal best instantly. Just select your swimmer, and the app shows your current level (B–AAAA), how far you are from the next standard, and all qualifying times in one place. It’s a really easy way to track your progress.

@peppy_squid127