Are inputs saved?
Inputs are calculated in your browser and are not sent to a server. When you use sharing, the reproducible URL includes the current conditions.
Fitness
Interval Workout Timer
Run configurable work, rest, and set intervals.
Updated: May 15, 2026
Input
Run configurable work, rest, and set intervals.
Result
01:00
Work
1/5
Set
07:00
Total time
Share this tool
How to use
- Enter Work time, Rest time, Sets.
- Check the estimate in the result area.
- Share a reproducible URL if needed.
How to read the result
- Read Timer, Set progress as the current settings and progress.
- For audio tools, check device volume and browser playback permission.
Useful tips
- Useful when you want to run HIIT or run workouts; adjust inputs to compare scenarios.
- Useful when you want to time a custom interval session; adjust inputs to compare scenarios.
- Use results as training guides and adjust for condition, heat, surface, and fatigue.
- If the result feels too demanding, reduce distance, intensity, or duration and recalculate.
Calculation
The tool calculates training estimates from distance, time, and heart-rate inputs.
Notes
- Adjust for your condition and environment.
- This is not medical or coaching advice.
- Stop exercising if you feel pain or discomfort.
Related tools
See more mini tools- Running Pace Calculator Fitness Calculate pace per kilometer from distance and time.
- Walking Time Calculator Fitness Estimate walking time from distance and walking speed.
- Heart Rate Zone Calculator Fitness Estimate training zones from maximum heart rate.
- Race Time Predictor Fitness Estimate race times for another distance from a recent result.
- BMI Calculator Fitness Calculate BMI from height and weight, plus a rough standard weight range.
- BMI Weight Range Calculator Fitness Estimate target weight and BMI range from height and a target BMI.
FAQ
Is timing perfectly exact?
It runs with browser timers and audio APIs. It is suitable for everyday practice or work, but device load, power-saving settings, and background tabs can affect timing.
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