Custom Timer
Set any countdown from one second to 99 hours. Type the hours, minutes, and seconds, or tap a preset, then press start.
Link straight to a duration: add ?t=seconds to the address, for example /custom-timer/?t=420 for seven minutes.
Space start/pause · R reset · F fullscreen · M mute
When to use a custom length
Fixed pages like the 5-minute or 10-minute timer are faster to open and easier to remember. Use this page when the duration is unusual: a 7-minute workout, 90-second rest intervals, a 12-minute egg, a 1h45 exam section, or a 3-minute-30 song-length practice run.
- Changing a field while the timer is stopped resets it to the new length.
- Enter inside a field starts the countdown.
- Durations of an hour or more show hours:minutes:seconds.
- + adds a minute at any time, even while running.
Questions
What is the maximum duration?
99 hours, 59 minutes, 59 seconds. Browser timers of several days are unreliable because the tab or computer will sleep, so we cap it there.
Does the timer remember my last setting?
No. Each visit starts at five minutes to keep things predictable. Bookmark a link with ?t=seconds for a duration you use often.
Can I run two custom timers at once?
Open the page in two tabs. Each runs independently and each shows its remaining time in the tab title.