90-Second Timer
Press start. It counts down to zero and rings an alarm — nothing to download, nothing to sign up for.
About this 90-second timer
A one-click 90-second countdown, most often used for rest between gym sets, a breathing break, or reheating a single portion. It runs in your browser and rings when it reaches zero.
Ninety seconds: the reset window
Ninety seconds is a common rest period between strength sets and a popular breathing-break length. Clinicians sometimes describe a rough '90-second' window for a surge of strong emotion to peak and start to fade if you don't feed it — a useful idea to try, though not a fixed rule.
90 seconds in other units
| Seconds | 90 |
|---|---|
| Minutes | 1.5 |
| Hours | 0.025 |
| Milliseconds | 90,000 |
| Share of a day | 0.1% |
Tips for using a 90-second timer
- For hypertrophy-style training, 60-90 seconds of rest between sets is the common recommendation.
- Use 90 seconds of slow breathing — about nine to twelve breaths — before a stressful call.
- It's long enough to microwave most single portions of leftovers; check and stir halfway.
Frequently asked questions
How do I set a 90-second timer?
Press Start above and the page counts down from 90 seconds on its own — nothing to type. Need a little longer? Press +1 min while it runs, or pick a nearby duration from the list.
How many seconds are in 90 seconds?
90 seconds is 90 seconds — 1.5 minutes or 0.025 hours. That's 0.1% of a day.
What is a 90-second timer good for?
People commonly use a 90-second timer for rest between gym sets, a breathing break, or reheating a single portion.
Will it keep time if I switch tabs?
Yes. The countdown is measured against your device clock rather than counting screen refreshes, so it stays accurate in a background tab and the alarm fires on time. Some browsers need one click on the page before they allow sound.