Swimming Calculators: Pace, Laps, Calories & CSS
Pace per 100 m, lap converter, calories burned and critical swim speed · free, no signup
See Swimming Calculators: Pace, Laps, Calories & CSS in action
Swimming Calculators: Pace, Laps, Calories & CSS
Four swim calculators: your pace per 100 m or yards and projected times for common distances; laps to distance (and back) for any pool length; calories burned by stroke and intensity; and critical swim speed (CSS) from a 200 m and 400 m test with training paces for five zones.
Useful for pool training, triathlon preparation and open-water goals.
Key features
Pace and race projections
50 m to 3.8 km.
Laps to distance
Any pool length.
Swim calories
By stroke.
CSS and zones
From a 200/400 test.
How to use it
- Use the section you need.
- Enter times and distances.
- Read pace, laps, calories or zones.
Worked example
Example
1500 m in 30:00 is 2:00 per 100 m. 40 lengths of a 25 m pool is 1,000 m.
Who uses this tool
Lap swimmers
Plan sets.
Triathletes
Pace the swim leg.
Coaches
Zone targets.
Tips for the best results
- Test CSS after a warm-up with full rest between efforts.
Common mistakes to avoid
- Counting out-and-back laps as lengths.
Why use AZRS QuickFix?
It is 100% free, needs no signup and has no watermark or usage limits. The tool runs in your browser, so what you type stays on your device, and it works on phones, tablets and desktops. New tools are added every week — bookmark this page or browse the full QuickFix toolbox.
Frequently asked questions
What is CSS?
The speed you can hold for roughly 30 minutes: (400 m time − 200 m time) ÷ 200.
Is it free and private?
Yes. It is free with no signup. Everything runs in your browser and anything saved stays on your own device.