Swimming Pace Calculator Formula
Understand the math behind the swimming pace calculator. Each variable explained with a worked example.
Formulas Used
Pace per 100m (min)
pace_min = floor(pace_per_100 / 60)Pace per 100m (sec)
pace_sec = round(pace_per_100 - floor(pace_per_100 / 60) * 60)Speed
speed_mps = round(distance_m / total_seconds * 100) / 100Pace per 100 yards
pace_per_100yd = round(pace_per_100 * 0.9144)Variables
| Variable | Description | Default |
|---|---|---|
distance_m | Distance(meters) | 1500 |
minutes | Minutes(min) | 25 |
seconds | Seconds(sec) | 0 |
total_seconds | Derived value= minutes * 60 + seconds | calculated |
pace_per_100 | Derived value= total_seconds / (distance_m / 100) | calculated |
How It Works
How Swimming Pace Is Calculated
Formula
Pace per 100m = Total Time (sec) / (Distance / 100)
Benchmarks (per 100m freestyle)
Yards vs Meters
US pools are typically 25 yards; international pools are 25m or 50m. Multiply yard pace by 0.9144 to approximate meter pace, though pool length and turns also affect times.
Worked Example
Calculate pace for 1500m in 25 minutes flat.
- 01Total seconds = 25 x 60 + 0 = 1500 seconds.
- 02Number of 100m segments = 1500 / 100 = 15.
- 03Pace per 100m = 1500 / 15 = 100 seconds = 1:40.
- 04Speed = 1500 / 1500 = 1.00 m/s.
Frequently Asked Questions
How do I improve my swimming pace?
Focus on technique first: streamlined body position, efficient catch, and bilateral breathing. Interval training (e.g., 10x100m with 15 seconds rest) builds speed. Drill work improves efficiency more than just swimming laps.
Is pool swimming pace accurate for open water?
Open water is typically 10-20% slower due to lack of walls for push-offs, navigation, waves, and currents. Add a buffer when using pool pace to predict open water times.
How does pool length affect pace?
Short course (25m/25yd) pools give faster times because of more turns and push-offs from the wall. Long course (50m) times are typically 2-5% slower than short course.
Ready to run the numbers?
Open Swimming Pace Calculator