How do I convert SCY to LCM?

Multiply the SCY time by the appropriate stroke- and distance-specific factor. The tool does this automatically and shows the factor used. For 100 free, the Classical factor is approximately 1.110 (so 50.00 SCY ≈ 55.50 LCM).

Why is my LCM time slower than my SCY time?

Long course (50-meter) pools have fewer turns than short course (25-yard) pools. Each turn provides a fast push-off and underwater dolphin-kick phase; in a 50-meter pool, you get fewer of them per race, so total time is slightly slower.

Are SCY 500 free and LCM 400 free comparable?

Yes — they're the standard distance-equivalent pair. The tool maps SCY 500 → LCM 400 automatically and applies a factor that reflects both the course shift and the slight distance difference (500 yards ≈ 457 meters, so 400 LCM is the closest standard event).

What about SCY 1000 and 1650?

SCY 1000 → LCM 800; SCY 1650 → LCM 1500. The tool applies stroke-equivalent and distance-equivalent factors to convert.

Which model should I use for SCY → LCM?

Classical is the right default for general purposes. Use USA Swimming if you're checking age-group qualifying. Use NCAA Administrative if you're evaluating a recruit. The Compare-models view shows all four side-by-side.

Do these factors apply to relay times?

Approximately. Relays are sums of individual swims, and individuals don't all benefit equally from turns — but the tool applies the same factor as a usable approximation, with a note explaining the caveat.

Will my times be sent anywhere?

No. Everything happens in your browser. Permalinks live in the URL fragment, which browsers do not transmit to servers.

SCY to LCM Swim Time Converter

Convert Short Course Yards (25y pool) swim times to Long Course Meters (50m pool) with stroke- and distance-specific factors. Compare four conversion models, see the math, share a permalink. Free, no signup.

Last updated: May 2026

Time

Accepts 50, 50.32, 1:48.50, or 15:23.45.

Enter a time.

Event

From course

Convert to

Conversion model

Long-standing factors used by Colorado Timing

Gender

Advanced

Show even-splits estimateApply altitude adjustment (approximate)

Enter a valid time to see conversions.

What it does

SCY → LCM preset, ready in one click

The page loads with Source = SCY and Target = LCM already selected. Type your time, pick the event, see the conversion. No mode switching needed.

Stroke- and distance-aware factors

100 fly converts at ≈1.130; 100 breast at ≈1.085. The tool uses the right factor automatically — and shows you which factor was used and why.

Compare four conversion models

Classical, USA Swimming, NCAA Administrative, and Performance regression — see how each model translates the same SCY time, side-by-side.

Time-standards inline

Add gender and age and the page surfaces the relevant USA Swimming or NCAA cuts in the LCM equivalent. Useful for swimmers checking whether a winter SCY PR projects to a summer LCM cut.

Share a permalink

Press Share to copy a permalink that encodes the conversion in the URL fragment. Send it to your coach, parents, or a recruiter. Hash fragments are never sent to the server.

How to use SCY to LCM Swim Time Converter

1
Enter your SCY time
Type the time as 1:48.50, 50.32, or 15:23.45. The parser is forgiving — whitespace and a trailing "s" are tolerated.
2
Pick the event
Stroke + distance dropdowns. Distances scope to events that exist in SCY (50/100/200/500/1000/1650 free, 100/200 of the form strokes, etc.).
3
See the LCM result
The tool shows the converted LCM time, the factor used, and the formula. Below: pace per 100, optional splits, optional altitude adjustment.
4
Open Compare models
See all four models' conversions for the same time. Factor differences (Classical vs USA Swimming vs NCAA) are usually small — but they matter for recruiting and qualifying decisions.
5
Share, print, or PDF
Permalink copies an LZ-string-compressed URL fragment to your clipboard. Print produces a clean summary. PDF lazy-loads the export library only when you click.

Frequently Asked Questions

How do I convert SCY to LCM?: Multiply the SCY time by the appropriate stroke- and distance-specific factor. The tool does this automatically and shows the factor used. For 100 free, the Classical factor is approximately 1.110 (so 50.00 SCY ≈ 55.50 LCM).
Why is my LCM time slower than my SCY time?: Long course (50-meter) pools have fewer turns than short course (25-yard) pools. Each turn provides a fast push-off and underwater dolphin-kick phase; in a 50-meter pool, you get fewer of them per race, so total time is slightly slower.
Are SCY 500 free and LCM 400 free comparable?: Yes — they're the standard distance-equivalent pair. The tool maps SCY 500 → LCM 400 automatically and applies a factor that reflects both the course shift and the slight distance difference (500 yards ≈ 457 meters, so 400 LCM is the closest standard event).
What about SCY 1000 and 1650?: SCY 1000 → LCM 800; SCY 1650 → LCM 1500. The tool applies stroke-equivalent and distance-equivalent factors to convert.
Which model should I use for SCY → LCM?: Classical is the right default for general purposes. Use USA Swimming if you're checking age-group qualifying. Use NCAA Administrative if you're evaluating a recruit. The Compare-models view shows all four side-by-side.
Do these factors apply to relay times?: Approximately. Relays are sums of individual swims, and individuals don't all benefit equally from turns — but the tool applies the same factor as a usable approximation, with a note explaining the caveat.
Will my times be sent anywhere?: No. Everything happens in your browser. Permalinks live in the URL fragment, which browsers do not transmit to servers.

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