Free Tool
Workout Rest Timer
Pick a rest period, hit start, get back to the bar. Audible beep, browser notification, and a vibration on mobile when the timer ends. Auto-repeat handles circuits and supersets.
Quick durations
By training style
Get a smart rest timer that adjusts to your lift in Zealova
Rest periods auto-set per exercise based on rep range and load. The timer runs in the background and survives a screen lock, with a coach prompt when it ends.
Free 7-day trial. $7.99/mo or $59.99/yr after. Cancel anytime.
Methodology + Sources
- Schoenfeld BJ et al. (2016). Longer interset rest periods enhance muscle strength and hypertrophy in resistance-trained men. JSCR 30(7).
- de Salles BF et al. (2009). Rest interval between sets in strength training. Sports Med 39(9):765-77.
- NSCA Essentials of Strength Training and Conditioning, 4th ed. (2016). Rest interval prescription per training goal.
Last updated: 2026-05-14
Built by Sai, founder of Zealova. Not a neutral third party. Calculator results are estimates. For medical decisions, consult a qualified professional.
Frequently asked questions
How long should I rest between sets?+
For heavy strength work (1-5 reps), 3-5 minutes. For hypertrophy (8-12 reps), 60-90 seconds for isolation, up to 2 minutes for compounds. For endurance (15+ reps), 30-60 seconds. The new ACSM and NSCA guidelines support longer rests even for hypertrophy if absolute load matters.
Will the beep play if my screen is off?+
Browsers throttle background tabs. On a phone with the screen off, audio may be cut. Keep the tab visible during your set, or use the browser notification which fires even when backgrounded. In Zealova the timer runs natively and survives the screen lock.
What is auto-repeat for?+
Circuit training and supersets. Turn it on and the timer restarts itself each cycle, so you do not have to tap start between rounds.
Does this work offline?+
Yes, once the page loads. Everything runs in the browser. No data is sent anywhere.
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