SCY ⇄ SCM ⇄ LCM — بحسب السباق وبالوقت الحقيقي.
عادةً يزيد الوقت (جدران أقل).
زيادة أقل مقارنةً بـ LCM.
غالبًا أسرع بسبب جدران أكثر.
اضبط أشرطة التمرير لمواءمة ميزة منعطفاتك.
هذه تقديرات وليست تحويلات رسمية.
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.
لأن المنعطفات والدفع والمراحل تحت الماء تختلف كثيرًا بين الأشخاص، استخدم أشرطة التمرير لمواءمة ملفك للحصول على تقديرات أفضل.
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.
