Short Course Meters
100 m Freestyle
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Enter your swim time to see this estimate.
Different pools. A common starting point.
Swim Time Converter
Convert SCY, SCM and LCM times, with a formula and source for every estimate.
Converted times
Your converted times
SCM
Long Course Meters
100 m Freestyle
—:—.—
Enter your swim time to see this estimate.
Converted times are estimates. Actual race performance can differ. Check your meet’s rules before using a converted time for an entry.
Based on SportsEngine course conversion rules for USA Swimming teams
Coefficients checked · Sep 8, 2026
From one pool to another
Choose the original event
Select the pool where you swam, your stroke and the event distance.
Enter your recorded time
Use seconds or a time with colons. We keep hundredths of a second.
Compare the estimates
Read the two target events, then check their formulas and sources.
A few useful distinctions
What do SCY, SCM and LCM mean?
SCY is a 25-yard pool, SCM is a 25-meter pool, and LCM is a 50-meter pool. These describe the length of the pool, while the event distance is the total distance you swim. A 100 yd event in SCY is four pool lengths.
Why does 500 yards convert to 400 meters?
They are corresponding freestyle events in this model, rather than equal physical distances. The same event mapping pairs 1000 yd with 800 m, and 1650 yd with 1500 m. The target event is always shown alongside the estimate.
Why are some conversions unavailable?
We have not verified the SCY–SCM factors for long freestyle events or 100 IM. Those directions stay unavailable while other supported targets still calculate. This calculator’s LCM event set also does not include 100 IM. See the exact support boundaries.
Can I use a converted time to enter a meet?
Check the meet’s current rules first. This calculator does not certify entry or qualifying times. Its estimates cannot account for your individual turns, technique or race conditions, and it does not use a current NCAA qualifying model.