Switching pool courses
See how a short-course yards swim compares with a 25-meter or 50-meter pool time.
Free Swimming Calculator
Swim Time Converter
Convert swimming times between SCY, SCM, and LCM courses — with yards to meters built in.
Enter your event and time to see equivalent swimming times across different course lengths.
Course
SCY = Short Course Yards · SCM = Short Course Meters · LCM = Long Course Meters
Gender (used by some conversion models)
Standard conversion method (Colorado factor set). Results are estimates — different organizations and models may produce different numbers.
Equivalent Time
59.80
100 Free · LCM
Converted from
52.43 100 Free · SCY
| Course | Equivalent Time |
|---|---|
| SCYShort Course Yards · 25 yardsSource | 52.43 |
| SCMShort Course Meters · 25 meters | 58.20 |
| LCMLong Course Meters · 50 meters | 59.80 |
Made for every course
When a swim time converter comes in handy
Compare equivalent swim times wherever you train, race, or set your next goal.
Comparing race equivalents
Put a race result in context when comparing performances from meets in different pool lengths.
Getting ready for meet day
Estimate equivalent times for your target event and arrive with a clearer race-day benchmark.
Related Swim Calculators
Swim Pace Calculator
Work out your pace per 25, 50 or 100 for any race distance and target time.
Open calculator →Swim Split Calculator
Generate even, target splits for any event and number of lengths.
Open calculator →Critical Swim Speed (CSS)
Find your threshold pace from a 400 + 200 test, with training zones and projected times.
Open calculator →Interval & Send-off
Build training sets: pick repeats, distance and pace to get repeat times and wall-clock send-offs.
Open calculator →Speed & Race Projection
Convert any swim into pace per 100, speed in m/s / km/h / mph, and projected mile times.
Open calculator →Swimming Calories
Estimate calories burned by stroke, intensity, weight and swim time.
Open calculator →Lengths & Distance
Convert swim distances to pool lengths and back for 25 yd, 25 m or 50 m pools.
Open calculator →Course Converters
Jump straight to a specific pairing. Each converter covers every event and explains the factor and turn logic behind it.
SCY vs SCM vs LCM
The course (pool length) you swim in changes how the race plays out. Here is how the three standard competition courses compare.
Full guide: SCY vs SCM vs LCM and which course is faster →
| Course | Length | Common Usage |
|---|---|---|
| SCYShort Course Yards | 25 yards | U.S. high school, NCAA and club competition |
| SCMShort Course Meters | 25 meters | International short-course season |
| LCMLong Course Meters | 50 meters | Olympic Games, World Championships, majors |
How Does a Swim Time Converter Work?
SCY (Short Course Yards), SCM(Short Course Meters) and LCM (Long Course Meters) describe the pool the race is swum in. A 50-meter pool (LCM) is twice as long as a 25-meter pool, and a 25-yard pool is slightly shorter again — one yard is about 0.91 meters.
The reason a swimmer posts different times in each course is largely turns. In a 25-yard pool a 200 freestyle has more wall pushes than the same race in a 50-meter pool, so short-course swimming is typically a little faster. The difference grows with distance: a mile event has far more turns to gain from than a sprint.
A converter estimates an equivalent time by applying a course factor and a per-turn adjustment. This site uses the widely adopted Colorado factor set used across U.S. Masters Swimming and age-group programs.
Because the exact advantage of each extra turn varies from swimmer to swimmer, all course conversions are estimates. Different organizations publish different factor sets, so the numbers here may differ slightly from other calculators — that is expected.
How to Use This Converter
- 1Pick the course your time was swum in — SCY, SCM or LCM.
- 2Choose your event (for example 100 Free) and enter your time as
52.43or1:52.37. - 3Press Convert Time to see the equivalent time in every course, then copy or share the result.
Sketch the set before you swim it
Most workouts start as a rough diagram — lanes, send-offs and target splits scribbled on a whiteboard or the back of a score sheet. When you are away from the pool deck, SimpleSketchpad is a free browser drawing pad that is quick enough to block out a training set or trace a race plan, then bring the numbers back here for the course conversion.
Why Use the Swim Time Converter?
Looking for a swim time converter calculator you can trust? This free swim time converter turns any score from one pool into its fair equivalent on another — SCY, SCM or LCM — and it converts yards to meters and meters to yards right on the same page. Swimmers in the USA, the UK, Europe and Australia use it to compare results, seed races, set qualifying goals and check training paces, all without installing a thing.
Whatever you search for — "swim time converter", "swim time calculator", "swimswim swim time converter", or even "swim swim time converter" — you end up needing the same thing: an instant, accurate way to see what a time in one course means in another. That is exactly what this page does, in fewer than five seconds.
A swim time calculator for every event, from the 50 to the mile
The converter covers the full race slate — 50, 100, 200, 400/500, 800, 1000, 1500, the mile and the 1650 — plus the individual medleys: a swim time converter 100 IM, 200 IM or 400 IM works exactly like the freestyles. Swim a 100 IM in 1:02.30 short course yards, and the same effort comes back as a slightly different time in a short course meters pool and a different one again long course. Because the number of turns changes the race, the conversion is event-aware: sprint conversions shift less than the mile.
Want to know how your 100 IM or 200 free compares to a friend who trains in a different pool? Enter both times, or check the CSS and race projection tools for pace benchmarks.
Yards to meters — the swim time converter and its distance twin
Pool lengths get confusing quickly: swim time converter 25 yards to meters is 22.86 meters (that is a US short course pool), 50 yards to meters is 45.72 meters, and the 1650-yard mile is 1508.76 meters. On the flip side, aswim time converter meters to yards shows 25 meters = 27.34 yards and 1500 meters = 1640.42 yards. Many swimmers search for a "swim time converter 25 meters to yards" — that exact conversion, plus a dedicated lengths and distance converter, is built in here.
In the USA, high school, NCAA and Masters swimming almost all race in yards, while the rest of the swimming world — the UK, Europe and Olympic programs — races in meters. A single tool that handles both is why "swim time converter 25 yards to meters usa" and its meter-first cousin return here.
Short course to long course, in either direction
The short course to long course swim time converter is the heart of the site. A SCY to LCM swim time converter takes a 25-yard pool time and projects it to a 50-meter pool; SCM to LCM swaps 25-meter short course for long course; and every reverse pairing — LCM to SCY, LCM to SCM, SCM to SCY — is one click away. The method combines a documented course factor with a per-turn adjustment, the same approach used by US Masters Swimming.
Used this way, the tool doubles as a swim time difference calculator: set your time once and read the difference between your SCY, SCM and LCM equivalent side by side — no columns of printed conversion tables and no paper.
From the U.S. to the UK: one tool for every course
Course names differ, but the math is shared. U.S. swimmers get the yards speed they know from NCAA and age-group racing; a UK "swim time converter" audience trains in 25-meter pools in winter and 50-meter pools in summer, so SCM-to-LCM is second nature; and swimmers aiming at Swimming World and Olympic benchmarks think in long course. This converter speaks all three languages, so "swim time converter" search intent looks the same whether the traffic comes from the USA, the UK or anywhere else the swimming world races.
The best swim time converter tool — free, private, in your browser
Better than fumbling through columned tables from Swimswam or Swimming World, and lighter than the feature-heavy club apps, this works entirely in your browser: no accounts, no sign-ups, no data sent anywhere, and zero cost for unlimited conversions. Every result is clearly labelled as an estimate — the honest caveat of any course conversion — and historical factor sets used by federations are applied transparently.
Choose this as your every-meet swim time converter tool, bookmark it for the season, and pair it with the pace, split, interval and calorie calculators to plan a whole season from one place.
Frequently Asked Questions
What is a swim time converter?
A swim time converter estimates how your time in one pool type would compare to an equivalent time in another pool type. Because a 50-meter pool, a 25-meter pool, and a 25-yard pool all pace differently, the same effort produces different finish times in each course.
What is SCY in swimming?
SCY stands for Short Course Yards — competition swum in a 25-yard pool, the standard for U.S. high school and NCAA swimming.
What is SCM in swimming?
SCM stands for Short Course Meters — competition swum in a 25-meter pool, common in Europe, Australia, and international short-course season.
What is LCM in swimming?
LCM stands for Long Course Meters — competition swum in a 50-meter Olympic-size pool, the course used at the Olympic Games and World Championships.
How do I convert SCY to LCM?
Select SCY as the course you are converting from, choose your event and time, then select LCM as the target. This converter applies a documented yard-to-meter factor plus a per-turn adjustment for the larger number of turns in a 25-yard pool.
Why are SCY and LCM times different?
Short-course pools are swum in 25-yard lengths, meaning more turns — and each turn lets the swimmer push off the wall and glide. Long-course (50m) swimming has half the turns, so the same swimmer is generally a few seconds slower, especially in longer events.
Are swimming time conversions exact?
No. Every conversion is an estimate. Different swimmers gain different amounts from turns and walls, so no single factor is exact for everyone. Different organizations also publish different conversion models — treat results as close approximations.
Which swimming conversion method should I use?
For general use, the standard factor-based method (the Colorado factor set used by U.S. Masters Swimming and many age-group programs) is the most common. This site uses that method by default. If you need an official NCAA or performance-based conversion, check the relevant governing body.
How does the swim time converter handle the 100 IM?
The unit covers every IM event — 100 IM, 200 IM and 400 IM — exactly like the freestyles. Pick 100 IM, enter your time, and the converter applies the event-aware factor plus per-turn adjustment to give your equivalent SCY, SCM and LCM times.
Is this also a yards to meters and meters to yards converter?
Yes. The distance twin of the time converter handles the exact lookups swimmers search for: 25 yards = 22.86 meters, 50 yards = 45.72 meters, 1650 yards = 1508.76 meters, and in the other direction 25 meters = 27.34 yards and 1500 meters = 1640.42 yards. Open the Lengths & Distance converter for instant yards to meters or meters to yards.
Can I compare the difference between my SCY, SCM and LCM times?
That is exactly what this swim time difference calculator does. Enter one time once and read your equivalent SCY, SCM and LCM results side by side, so you can see how much the course changes your finish time for any event.
Is the swim time converter free and is my data safe?
The swim time converter is completely free with unlimited conversions, runs entirely in your browser, and never sends your entered times to a server. Every result is an estimate and is labelled as such, matching the approach used by US Masters Swimming.