Swim pace is measured as the time to complete 100 yards or 100 meters and is the universal metric for comparing swimming performance across distances and pool types. Whether you are training in a short-course yard pool in the US or preparing for an open water race measured in meters, this calculator converts times, computes your pace per 100, and projects finish times for every major swim distance.
Your Swim Time
Race Time Projections
(at constant pace)| Distance (yd) | Projected Time | Pace / 100 |
|---|
SCY ↔ LCM Conversion
Conversion factor: SCY × 1.11 = LCM equivalent. Accounts for turns and pool length difference.
How to Use the Swim Pace Calculator
The swim pace calculator helps you understand your swimming performance in terms of pace per 100 yards or meters, convert times between pool types, and project finish times for any competitive swim distance. It is an essential planning tool for swimmers training in different pool environments.
Step 1: Select Your Pool Type
Use the toggle at the top to select Yards (SCY) for short-course yard pools common in the United States, or Meters (LCM/SCM) for metric pools used in international competition. All inputs, results, and projected distances will update to match your selected unit.
Step 2: Enter Your Distance
Click a preset button for common distances (100, 200, 500, 1000, 1500, 1650) or type any distance directly. The 1650 yard option represents the classic "mile" swim in US competition, while 1500 meters is the Olympic open water and pool distance.
Step 3: Enter Your Time
Enter your swim time in hours, minutes, and seconds. Most pool swims will only require the minutes and seconds fields. For example, a 500-yard swim in 8 minutes 20 seconds: enter 0 hours, 8 minutes, 20 seconds.
Step 4: Read Your Results
After clicking Calculate, you will see four key stats: your pace per 100 yards or meters, total time, speed in yards or meters per minute, and the converted pace in the other unit. Below, a race projections table shows your expected time at seven common swim distances, and the conversion panel shows your SCY and LCM equivalent paces side by side.
Understanding SCY to LCM Conversion
The conversion factor of 1.11 between Short Course Yards and Long Course Meters is a widely used standard in competitive swimming. When you swim in a short-course yard pool, you gain a speed advantage from more frequent turns and push-offs. The 1.11 factor adjusts for this, giving you a realistic estimate of what your time would be in a 50-meter pool. This is particularly useful when comparing times from different meets or preparing for an international competition.
Using Pace for Training
Knowing your swim pace per 100 lets you set precise interval targets. For example, if your 500-yard pace is 1:40/100, you would aim to hold approximately 1:42-1:45/100 during longer sets to build aerobic base, and target 1:35/100 or faster for race-pace sets. Use the swim pace calculator before each training cycle to set accurate split targets.
Frequently Asked Questions
Is this swim pace calculator free to use?
Yes, the swim pace calculator is completely free with no signup required. All calculations run locally in your browser, so no data is ever sent to any server.
Is my data private?
Absolutely. Everything runs in your browser using JavaScript. Your swim times and distances are never transmitted or stored anywhere.
What is the SCY to LCM conversion factor?
The standard conversion factor from Short Course Yards (SCY) to Long Course Meters (LCM) is 1.11. This accounts for the extra turns in a 25-yard pool and the slightly shorter distance compared to a 50-meter pool. To convert a SCY time to an equivalent LCM time, multiply your time by 1.11.
How is pace per 100 calculated?
Pace per 100 is your average time to swim 100 yards or 100 meters. It is calculated by dividing your total time (in seconds) by the distance (in yards or meters) and then multiplying by 100. For example, swimming 500 yards in 8:20 gives a pace of exactly 1:40 per 100 yards.
What distances are included in the race time projections?
The calculator projects times for 50, 100, 200, 500, 1000, and 1500 meters or yards, as well as the 1650 yard mile. These cover the most common competitive and open water swim distances.
How accurate are the projected race times?
Projected times assume a constant pace, which is a reasonable approximation for sprint distances but less accurate for long distances where fatigue plays a larger role. For competitive planning, use the projections as a starting benchmark and adjust based on your actual race experience.
Can I switch between yards and meters?
Yes, use the unit toggle at the top of the calculator to switch between yards and meters. When you switch, all inputs, results, and projected race distances update automatically to reflect your chosen unit.
What is the difference between SCY, SCM, and LCM pools?
SCY (Short Course Yards) pools are 25 yards long, common in the United States. SCM (Short Course Meters) pools are 25 meters long, standard for most international club competitions. LCM (Long Course Meters) pools are 50 meters long, the standard for Olympic events. Times differ between course types due to turn frequency and push-off advantage.