SCY ⇄ SCM ⇄ LCM — 種目対応・リアルタイム。
一般にタイムが増えます（壁が少ない）。
LCMより増加が小さめ。
壁が多い分、速くなることが多い。
スライダーでターンの有利さを調整してください。
これは推定値で、公式換算ではありません。
SCM ⇄ LCM for UK pool formats & Swim England events.
SCY ⇄ LCM for NCAA, USA Swimming & recruiting.
Long course metres to short course yards.
Short course metres to short course yards.
Short course yards to Olympic long course.
Even, negative & descending lap splits.
The fundamental yards-to-metres conversion.
ターン・蹴り出し・水中局面は個人差が大きいので、スライダーであなたの特性に合わせると推定精度が上がります。
Understanding the relationship between time, distance, and speed is essential for training, race planning, and performance analysis. Here's the core formula every swimmer should know.
Time per unit distance. Expressed as time per 100m.
Example: 2:00 for 200m → 1:00/100m
Distance per unit time. Expressed in metres per second (m/s).
Example: 100m in 60s → 1.667 m/s
1. Pace → Speed: 1:30 = 90s per 100m → Speed = 100 ÷ 90 = 1.111 m/s
2. Total time = 30 min = 1,800 s
3. Distance = 1.111 × 1,800 = 2,000 metres
| Level | Speed (m/s) | Pace /100m | 30-min distance |
|---|---|---|---|
| Beginner | 0.7 – 0.9 | 1:51 – 2:23 | ~1,260 – 1,620 m |
| Intermediate | 1.0 – 1.3 | 1:17 – 1:40 | ~1,800 – 2,340 m |
| Competitive | 1.4 – 1.7 | 0:59 – 1:11 | ~2,520 – 3,060 m |
| Elite / Olympic | 1.8 – 2.2 | 0:45 – 0:56 | ~3,240 – 3,960 m |
Speeds are approximate for freestyle. Sprints are faster; distance events maintain lower speeds sustainably.
In the US, most pools are 25 yards (22.86 m) while international standards use 25 metres. Each SCM lap is ~2.14 m longer — your times will be slightly slower with the same effort.
Bars are proportional. Each SCM lap is 2.14 m (~7 ft) longer than an SCY lap.
| SCY Event | SCM Equivalent | Notes |
|---|---|---|
| 50 yd | 50 m | Same nominal |
| 100 yd | 100 m | Same nominal |
| 200 yd | 200 m | Same nominal |
| 500 yd | 400 m | Standard equivalent |
| 1000 yd | 800 m | Standard equivalent |
| 1650 yd | 1500 m | "The mile" |
Use the converter above with SCY → SCM selected to convert your times with wall-advantage adjustments.
A 50-yard pool (45.72 m) is rare but exists at some US university facilities and Masters meets. Comparing 50-yard times against international 50-metre or 25-metre standards requires accounting for both the distance and wall-turn differences.
A 50-yard pool is 4.28 m shorter per lap than a 50-metre Olympic pool.
50-yd and 50-m pools have the same wall count, but 50-yd laps are shorter — resulting in faster times. A 25-m pool doubles the walls, giving an even bigger advantage from push-offs. Use the converter above to adjust for these differences.
