How to calculate swimming pace
Swimming pace is usually shown as time per 100m or 100yd. Divide the finish time by the total distance, then multiply by 100 to compare different swims on the same basis.
DuoSwim tools
Race pace calculator.
Your goal time. Every split planned. Choose your race and see how to pace it.
YOUR RACEFree to use
Minutes : seconds . hundredths, or seconds (62.35).
YOUR RACE PLAN
100m Freestyle · 50m pool
Target race time
1:00.00
Average pace
1:00.00 / 100m
- First half
- 29.00
- Second half
- 31.00
- Difference
- +02.00Second half slower
Recommended splits
| Distance | Split | Cumulative |
|---|---|---|
| 0–50m | 29.00 | 29.00 |
| 50–100m | 31.00 | 1:00.00 |
| Finish 100m | 1:00.00 | |
A fast opening, then controlled speed through the finish.
Suggested targets, not a prediction. Adapt to your strengths and recent races.
Train with DuoSwim
Turn this calculator into a swim plan.
Use your calculated pace inside DuoSwim for personalised plans, guided workouts and progress tracking on your phone and watch.
How to pace a swimming race
Short races often open quickly and fade slightly. Longer races are usually faster when the start is controlled, the middle is steady and the finish builds progressively.
Pool swimming versus open-water pacing
Pool distances are measured, but open-water pace varies with sighting, drafting, waves and navigation. This tool plans pool races. For open-water preparation, explore our triathlon swim training.
From race pace to training
A goal race pace is not a training zone. Use recent test sets and coaching feedback to set training intensity. Explore personalised swim training plans for a structured route to your next race.
Common swimming pace examples
| Distance | Finish time | Average pace | Typical use |
|---|---|---|---|
| 100m | 1:30 | 1:30 / 100m | Short pool benchmark |
| 400m | 6:00 | 1:30 / 100m | Middle-distance freestyle |
| 1500m | 24:00 | 1:36 / 100m | Distance freestyle |
| 500yd | 6:00 | 1:12 / 100yd | Short-course yards freestyle |
Related DuoSwim tool
Want calories from that pace?
Use the swimming calorie calculator to estimate calorie burn from stroke, body weight, active time, distance or laps.
Open swimming calorie calculatorFrequently asked questions
Swimming pace calculator FAQs
How do I calculate my swimming pace per 100m?
Divide your total finish time by the distance swum, then multiply by 100. For example, 1500m in 24 minutes is 96 seconds per 100m, or 1:36 per 100m.
What is a good swimming pace per 100m?
A good pace depends on your experience, stroke, pool length and race distance. Use a recent race in the same event and course as your starting point, then choose a realistic goal with your coach.
Should I swim at an even pace?
It depends on the event. The start often makes the opening split faster. Distance freestyle generally benefits from a steady middle and a stronger finish, while sprint, breaststroke and butterfly races often slow as fatigue develops.
How should I pace a 100m swim?
A 100m swim usually starts quickly, settles slightly through the middle and finishes with maximum effort. The final length may feel harder even when the target split is close to average.
How should I pace a 1500m swim?
For 1500m, aim for a controlled opening, a sustainable middle section and a progressive build over the final few hundred meters.
How should I pace a 1.9km triathlon swim?
For a 1.9km triathlon swim, avoid an aggressive start unless you need position. Settle into rhythm early, sight efficiently and build effort only once your breathing is controlled.
Are pool and open-water swimming paces the same?
Not always. Open-water pace can be affected by sighting, drafting, currents, turns, navigation and wetsuit conditions, while pool pace is easier to measure precisely.
How are the recommended race splits calculated?
DuoSwim uses an independent model with different patterns for sprints, 200m races, distance freestyle and individual medley. It accounts for starts, turns and typical fatigue. These are planning estimates, not a personalised prediction. Every displayed split adds up exactly to your goal time, to the hundredth of a second.
What is the stroke order in individual medley?
Individual medley follows butterfly, backstroke, breaststroke, then freestyle, each for one quarter of the race distance. The calculator shows a total for each stroke and labels every split. The 100m and 100yd IM are available only in short-course pools.
Does the calculator support yards and short-course swimming?
Yes. Choose a 25yd pool for yard events, including 500, 1000 and 1650yd freestyle, or a 25m or 50m pool for metre events. Times are for the selected course; changing pools does not convert your goal time. Choose 25, 50 or 100-unit splits where appropriate for the event. Changing the interval groups the same race plan, so your pacing and first- and second-half totals stay the same.