Swimming Pace Calculator
Calculate swimming pace per hundred metres and project longer distances.
About Swimming Pace Calculator
Swimming pace is quoted per hundred metres because pool lengths make it the natural unit. Projecting to longer distances at the same pace is optimistic, since technique degrades with fatigue more sharply than in running. Open water adds roughly five to ten seconds per hundred metres against pool pace because of navigation and lack of push-offs.
Formula
Swimming Pace
Pace per 100 m = total seconds × 100 ÷ distance in metres
- pace per 100 m
- The standard swimming pace unit
- projection
- Assumes the same pace holds at the longer distance
Worked example
With the default values below, Swimming Pace Calculator returns Pace per 100 m of 1:46 per 100 m. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Distance swumminimum 1 m
- 1,500 m
- Time takenminimum 0 min
- 26 min
- Additional secondsaccepts 0–59 s
- 30 s
- Distance to projectminimum 0 m
- 3,800 m
Results
- Pace per 100 m
- 1:46 per 100 m
- Pace per 100 m
- 106.00 s
- Speed
- 0.9434 m/s
- Projected Time
- 1:07:08
- Lengths of a 25 m Pool
- 60.0
Step by step
- 1Values used
- 2Swimming Pace
- 3Pace per 100 m= 1:46 per 100 m
- 4Pace per 100 m= 106.00 s
- 5Speed= 0.9434 m/s
- 6Projected Time= 1:07:08
- 7Lengths of a 25 m Pool= 60.0
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- These figures are estimates based on population-average formulas and are intended for training and recreational planning only. They are not medical advice. Consult a qualified health professional before starting or changing an exercise programme, particularly if you have an existing medical condition.
- This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
These figures are estimates based on population-average formulas and are intended for training and recreational planning only. They are not medical advice. Consult a qualified health professional before starting or changing an exercise programme, particularly if you have an existing medical condition.
Frequently Asked Questions
How is Swimming Pace calculated?
Pace per 100 m = total seconds × 100 ÷ distance in metres Swimming pace is quoted per hundred metres because pool lengths make it the natural unit. Projecting to longer distances at the same pace is optimistic, since technique degrades with fatigue more sharply than in running.
Why does Swimming Pace matter?
Open water adds roughly five to ten seconds per hundred metres against pool pace because of navigation and lack of push-offs.
What values do I need to enter?
This calculator takes 4 inputs: Distance swum, Time taken, Additional seconds, Distance to project. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.