Water Aerobics Interval Timer
Set your work time, rest time, and round count, then follow each interval with a large countdown that stays readable at a distance.
Runs locally in your browser. Use your own judgment for exercise intensity.
A QUICK WALKTHROUGH
How to use this tool
- Set the work duration, rest duration, and number of rounds.
- Select Start, then pause or resume whenever you need a break.
- Follow the current phase, round, and total session time until the final round ends.
Simple interval control
Choose separate work and rest durations from 5 seconds to 30 minutes and run 1 to 99 rounds. The timer moves from work to rest and then to the next round automatically.
Readable poolside display
The remaining time is shown in large numerals alongside the current phase and round. Pause freezes the session and Resume continues from the same remaining time.
Local browser timer
All settings and timing stay in this browser. The timer is a general exercise interval aid, not a medical or health assessment tool.
GOOD TO KNOW
Common questions
Can I pause between intervals?
Yes. Pause stops the countdown and Resume continues from the paused timestamp.
How is the total session time calculated?
It is the sum of every work and rest phase, including the rest phase after each round except the final round.
Does the timer upload anything?
No. The settings and countdown run entirely in your browser.