Workout Interval Timer
Set work time, rest time and rounds for a simple interval session in your browser.
Workout Timer
Build healthy routines with private tools that work directly in your browser.
Workout Interval Timer
Set work, rest, and rounds for HIIT, Tabata, or any interval workout.
Wellness tools provide general support only. They do not diagnose, treat, or replace professional medical care. Progress is stored locally in this browser.
How this tool works
The timer provides visual timing prompts for self-directed exercise intervals. It does not choose an exercise, assess readiness or monitor physical safety.
Important limitations
- Use intervals appropriate for your current ability and surroundings.
- Warm up, maintain safe technique and stop if you feel pain, dizziness, faintness or unusual shortness of breath.
- People with health concerns should obtain professional guidance before strenuous exercise.
Frequently asked questions
Can beginners use an interval timer?
Yes, but beginners should choose comfortable work periods, longer rest and simple movements they can perform safely.
Does the timer continue if I close the browser?
No. Keep the page open during the session. Browser power-saving or background-tab limits may also affect timing.
Medical disclaimer: FitCalc provides general informational, fitness and wellness estimates or tools only. It is not medical advice, diagnosis, treatment, monitoring or emergency assistance. Consult a qualified healthcare professional before making health decisions and stop an activity if you feel unwell.
Explore the complete FitCalc toolkit, read the documentation, or try the TDEE calculator.