Swim Pace per 100 Calculator
Find your swim pace per 100 metres from a swim.
Results update as you type.
How it works
Pace per 100 metres is the universal language of swimming, and this calculator converts any swim into that benchmark. Enter the total distance you covered in metres and the total time it took in minutes, and it returns your pace per hundred metres, letting you compare a short set against a long continuous swim on exactly equal terms. The metric matters because swimming distances are almost always multiples of a pool length, and coaches write sets and send-off times in seconds or minutes per hundred metres. Expressing every swim the same way lets you track conditioning across sessions, set realistic interval targets, and pace a long swim evenly instead of fading. Triathletes in particular rely on it to judge whether their race-day swim pace is sustainable before committing to it in open water. The calculation spreads your total time across your total distance and rescales it to a hundred-metre reference, which is why it works for any swim length you enter. A falling pace per hundred metres at the same effort is clear evidence your swimming is improving, making this one of the cleanest ways to measure progress in the water. Whether you swim in a pool or open water, knowing your pace per hundred turns a distance and a stopwatch reading into a meaningful, comparable figure you can build training around.
pace per 100 m = total minutes ÷ total metres × 100
Pace per hundred metres normalises a swim of any length to a standard reference so efforts compare fairly. Dividing your total time by the total distance gives the minutes spent on each metre, and multiplying by one hundred scales that up to the time a full hundred-metre segment would take at the same rate. Because pools and swim sets are built in hundreds of metres, this unit translates directly into practical training splits and send-off times.
Source:Standard sports science (swim pace)
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter total distance and total time.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Pace per 100 m updates instantly as you type — no button to press.
Frequently asked questions
How do I read the pace in minutes and seconds?
The result is a decimal number of minutes per hundred metres, so convert the fractional part to seconds by multiplying by sixty. A pace of 1.5 means one minute thirty seconds per hundred metres, and 1.75 means one minute forty-five seconds. Do not read 1.5 as one minute fifty seconds. Swimmers usually talk in minutes and seconds per hundred, so this conversion lets you compare directly with your normal training splits.
Why is 100 metres the standard reference?
Swimming sets and races are built from pool lengths, and a hundred metres is a natural unit that most training and competition distances are multiples of. Expressing pace per hundred lets you compare a fifty-metre sprint against a fifteen-hundred-metre distance swim on equal terms, and it matches how coaches prescribe send-off times. That shared reference is why swimmers everywhere describe their speed in seconds or minutes per hundred rather than in raw metres per second.
Does this work for a 25-metre pool?
Yes. Enter the actual total distance you swam in metres, whatever the pool length, and the total time. If you swam sixty lengths of a twenty-five-metre pool, that is 1,500 metres. The pace-per-hundred formula depends only on total distance and total time, not on how many lengths made up the swim, so it applies equally to short-course, long-course, and open-water swims once you know the true distance.
What is a good pace per 100 metres?
It depends on your level and the swim length. Many recreational swimmers hold around two minutes per hundred metres, competent club swimmers closer to ninety seconds, and elite swimmers well under a minute over shorter distances. Rather than chase a universal target, track your own pace per hundred over time. A lower figure at the same perceived effort is clear proof your swimming fitness and technique are improving.
Should I include rest in the total time?
That depends on what you want to measure. For a continuous swim with no stops, the total time is simply your swim time and the pace reflects your true swimming speed. If your session included rest between intervals, decide whether to count that rest: including it gives an overall average for the whole session, while excluding it isolates your swimming pace. For comparing fitness, use continuous swim time without rest.