Calculator inputs
The page stays in a single-column flow, while the input grid uses three columns on large screens, two on tablets, and one on mobile.
Example data table
This sample helps users understand how the calculator converts one swim into pace, speed, and target-race outputs.
| Distance | Total Time | Pool Length | Custom Pace | Pace / 100 m | Speed | Projected 400 m |
|---|---|---|---|---|---|---|
| 1500 m | 30:00 | 25 m | 2:00 / 100 m | 2:00 / 100 m | 0.83 m/s | 8:00 |
| 1650 yd | 28:30 | 25 yd | 1:44 / 100 yd | 1:54 / 100 m | 0.88 m/s | 7:38 for 400 m |
Formula used
Pace per meter = Total time in seconds ÷ Total distance in meters
Custom pace time = Pace per meter × Custom pace distance
Pace per 100 m = Pace per meter × 100
Pace per 100 yd = Pace per meter × 91.44
Speed (m/s) = Total distance in meters ÷ Total time in seconds
Number of lengths = Swim distance in meters ÷ Pool length in meters
Average length time = Total time ÷ Number of lengths
Distance per stroke = Pool length in meters ÷ Stroke count per length
SWOLF = Average length time in seconds + Stroke count per length
Projected time = Current pace × Target distance × (100 ÷ Projection factor)
How to use this calculator
- Enter the total swim distance and choose meters or yards.
- Enter total time using hours, minutes, and seconds.
- Set a custom pace distance, such as 50, 100, or 200.
- Choose the pool length to calculate average length pace correctly.
- Add stroke count and stroke rate if you want efficiency estimates.
- Enter a target race distance and optional projection factor.
- Press the calculate button to show results above the form.
- Use the CSV or PDF buttons to export your result summary.
Frequently asked questions
1) What does swimming pace mean?
Swimming pace is the time required to cover a chosen distance, such as 100 meters or 100 yards. It helps compare effort, consistency, and race readiness better than raw finish time alone.
2) Why does the calculator show both pace and speed?
Pace shows time per distance, which swimmers usually track in training. Speed shows distance covered per second, hour, or mile. Seeing both makes interval work and race analysis easier.
3) Why is pool length important?
Pool length changes the number of turns. More turns can affect rhythm, velocity, and average split time. Using the correct pool length improves average length pace and stroke-efficiency estimates.
4) Can I use yards and meters in the same page?
Yes. The calculator converts meters and yards automatically. You can swim in one unit, set the pool in another, and still receive comparable pace, speed, and projection results.
5) What is SWOLF?
SWOLF combines time and strokes for one pool length. Lower values often suggest better efficiency, but comparisons work best when stroke type, pool length, and effort level stay similar.
6) What does projection factor do?
Projection factor adjusts your projected finish times. A value above 100 assumes slightly faster performance. A value below 100 assumes slower pacing, useful for fatigue, open water, or conservative planning.
7) Can I use this for open-water swimming?
Yes, but results are cleanest for pool swims. Open-water conditions add currents, sighting, drafting, and variable turns. Use the projection factor to build a more realistic estimate.
8) Does a higher stroke rate always mean better pace?
No. Faster stroke rate can help, but only when it works with good distance per stroke and solid technique. Efficient propulsion matters more than simply turning the arms quicker.