Swim pace calculator
This swim pace calculator turns distance and time into your pace: the time per 100 meters or 100 yards, speed, time per length and a projection onto standard distances from 50 m to 1,500 m.
Source: Wikipedia – Swimming (sport): pool lengths 25 m and 50 m, freestyle distances 50–1,500 m, US distances in yards. Updated: .
How it is calculated
Swimming 1,500 m in 30:00 means a pace of 2:00 per 100 m – that is 3.0 km/h. The swim pace calculator takes your distance and time and gives you all the usual figures.
How it is calculated
- Pace: time ÷ distance × 100. For yards it converts with 1 yard = 0.9144 m so you see both values.
- Speed: distance ÷ time, in km/h and mph.
- Split per length: pace × pool length. In a 25 m pool, a quarter of the pace per 100 m is the time of one length.
- Projection: the same pace over the freestyle distances 50, 100, 200, 400, 800 and 1,500 m, the triathlon swim distances 750 m (sprint) and 1.5 km (Olympic distance), and the US distances 500, 1,000 and 1,650 yards.
In competition, swimmers race in 25 m (short course) or 50 m pools (long course); records are kept separately because the number of turns affects the time. The projection remains an estimate, as pace usually drops with distance.
Related tools: the running pace calculator, race time, the interval timer and the stopwatch.
Frequently asked questions
How do I calculate my swim pace?
Divide the time by the distance and multiply by 100. 1,500 m in 30:00 is 1,800 s ÷ 1,500 × 100 = 120 s, so 2:00 per 100 m.
What is a good pace per 100 m?
It depends on training and goals. More useful than a benchmark is your own progress: measure over the same distance and compare over weeks.
How do I convert pace per 100 m to pace per 100 yards?
100 yards are 91.44 m, so pace per 100 yards is about 8.6% shorter than per 100 m. The calculator shows both.
How long is a length of the pool?
Common are 25 m (short course) and 50 m (long course), and 25 yards in the US. Set the pool length to see the time per length.
How accurate is the projection to other distances?
It assumes a constant pace. Over longer distances pace usually fades; allow an extra margin depending on your training.
Sources and legal basis
- Wikipedia – Swimming (sport): pool lengths 25 m and 50 m, freestyle distances 50–1,500 m, US distances in yards
- Wikipedia – Triathlon: swim distances 750 m (sprint) and 1.5 km (Olympic distance)
As of: · Editorial policy
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