Swim Time Conversion Chart: Convert SCY, SCM and LCM Times (With Examples)

Course and Event Pairing Chart

Short-course yards means a 25-yard pool, short-course meters means a 25-meter pool, and long-course meters means a 50-meter pool. Most sprint and middle-distance events keep the same number in their names—100 meters pairs with 100 yards, for example—even though the physical distances differ. Distance freestyle uses special standard-event pairings.

These are competition-event relationships, not claims of exact length equality. For example, 400 meters is not 500 yards: 500 yards equals 457.2 meters. The paired events nevertheless occupy corresponding places in metric and yard programs, and the published factor applies to that event pair.

SCM to SCY NCAA Conversion Chart

NCAA Appendix C uses the same short-course factors for men and women. The exceptions are based on the distance freestyle event pairing, not gender.

To convert in the published direction, change the achieved time to seconds and multiply by the listed factor. For a reverse SCY-to-SCM estimate, divide by the same factor. The reciprocal direction is a convenience used by the site, not a separate NCAA-published factor table.

Selected LCM to SCY Factors

LCM requires a more detailed chart because factors vary by event and gender. Selected examples from the table show why a universal multiplier would be wrong:

This is deliberately not a substitute for the complete appendix. If your event is not shown here, use the exact NCAA official table. Do not borrow a nearby distance or a factor from another stroke. The calculator fails closed when an NCAA combination is missing rather than inventing a number.

Verified Example: 400 LCM Freestyle to 500 SCY

Consider a man who swims 4:00.00 in the 400-meter freestyle in a 50-meter pool. NCAA Appendix C pairs that event with the 500-yard freestyle and lists 1.105. Four minutes equals 240.00 seconds:

The verified result is 4:25.20. A women's 400 LCM freestyle uses a different published factor, 1.112, so the table selection must match the athlete. You can run an SCY, SCM or LCM conversion with the event-aware tool instead of manually searching a chart row.

How to Read and Apply the Chart Correctly

1. Confirm the original pool course; a 25-meter swim and a 50-meter swim do not share the same factor.
2. Match the event and paired target distance, especially for 400, 800 and 1,500 freestyle.
3. For LCM, choose the applicable men's or women's table.
4. Convert the time to seconds before multiplying.
5. Carry precision through the calculation and truncate—never round—the final hundredths.

Keep the original result in your records. A converted time should be labeled with both source and target, such as “4:00.00 LCM 400 free → 4:25.20 SCY 500 free.” That notation prevents the estimate from being mistaken for an achieved yard time.

When a Chart Is Not Enough

A chart standardizes comparison; it does not predict how a particular swimmer will race in another course. Starts, turns, underwater distance, pacing and familiarity with long-course swimming can all shift an actual result. Two athletes with identical SCY times may not have identical LCM outcomes.

Meet rules also matter. A governing body may specify which converted times are accepted, or a meet may require an achieved time in the target course. Treat this chart as an NCAA-based reference and estimation tool. Use the current official document for administrative decisions, especially if a rule, factor or eligibility question is material.