Rest Timer
Results are estimates only and may not reflect your individual needs. This tool is for educational purposes only and is not medical advice.
A simple rest timer for strength training. Choose a preset or set a custom rest period.
Rest timer ready
Choose a duration and press Start Rest.
Why use this calculator
Rest periods between sets directly influence strength output, hypertrophy, and workout density. Too short and performance drops; too long and training density falls. A dedicated timer removes the guesswork so you rest exactly as long as your programme requires.
How to use this calculator
Choose a preset rest duration (30 s, 1 min, 90 s, 2 min, 3 min, or 5 min) or enter a custom value. Press Start Rest to begin. The timer alerts you when rest is complete.
What the result means
Rest periods between sets affect recovery, strength, and hypertrophy. Shorter rests (60–90 s) are more metabolically demanding; longer rests (2–5 min) support maximum strength output.
Important limitations
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FAQ
How long should I rest between sets?
For hypertrophy: 60–120 seconds. For maximal strength: 2–5 minutes. For endurance circuits: 30–60 seconds.
Can I use this on my phone?
Yes — the timer works on mobile browsers.
These estimates are for educational purposes only and are not medical advice. They are not intended for children, teens, pregnancy, eating disorder recovery, or medical conditions.