Swimmers and Coaches often need to compare race results between long course (50m) and short course (25m) pools. Use the Torpedo Swimtalk LCM to SCM Time Converter below to instantly calculate your adjusted times, then scroll down to view our easy-reference conversion tables. Whether you’re tracking PBs, planning training, or preparing for competitions, this tool makes comparing performances simple and reliable
Time Converter
Flat % conversion between LCM and SCM — SCM always faster, more % for longer events.
Note: This tool supports LCM and SCM only.
LCM to SCM Conversion Tables Torpedo Swimtalk
Quick reference multipliers to convert race times between Long Course (50m) and Short Course (25m).
What this page is
These tables provide **flat percentage** conversion factors by distance so you can compare swims across pool lengths without a calculator. Apply the multipliers to your race time to convert between **LCM** and **SCM**.
LCM → SCM:
time × factor • SCM → LCM: time × factor
Note: Factors are distance-based and the same for all strokes. SCM is faster than LCM, with a larger difference at longer events.
LCM → SCM
Multiply your LCM time by the factor below to get the SCM estimate.
| Distance | % faster (SCM) | Factor (×) |
|---|---|---|
| 50 m | 1.5% | 0.985 |
| 100 m | 2.0% | 0.980 |
| 200 m | 2.5% | 0.975 |
| 400 m | 3.0% | 0.970 |
| 800 m | 3.5% | 0.965 |
| 1500 m | 4.0% | 0.960 |
Example: 100 m Back in LCM 1:21.40 → SCM ≈ 1:21.40 × 0.980 ≈ 1:19.97.
SCM → LCM
Multiply your SCM time by the factor below to get the LCM estimate.
| Distance | % slower (LCM) | Factor (×) |
|---|---|---|
| 50 m | +1.5% | 1.015 |
| 100 m | +2.0% | 1.020 |
| 200 m | +2.5% | 1.025 |
| 400 m | +3.0% | 1.031 |
| 800 m | +3.5% | 1.036 |
| 1500 m | +4.0% | 1.042 |
Example: 400 m Free in SCM 4:50.00 → LCM ≈ 4:50.00 × 1.031 ≈ 4:59.3.
FAQ
Do these apply to all strokes? Yes — these flat factors are distance-based for simple comparisons.
Why is SCM faster? More turns in a 25m pool mean more speed off walls and underwater, especially as the distance increases.
Want the instant calculator? Try the Torpedo Swimtalk Time Converter for quick LCM ⇄ SCM results.