课堂计时器
免费课堂倒计时与秒表：教室后排也看得清的超大数字、一键预设、醒目的结束提示音和全屏模式。
Timed tasks just got easier
Timers change classroom behavior: transitions get faster, station rotations stay honest, and “five more minutes of writing” becomes a fact rather than a negotiation. This timer is designed for exactly that:
- Giant digits readable from the back row, with a progress bar that fills as time runs out.
- Presets for the lengths teachers actually use — 1, 2, 3, 5, 10, 15, 20, 25, 30, 45, 60, 90 and 120 minutes.
- Chime + flash when time is up, and a stopwatch mode for counting up.
- Fullscreen mode for projectors and smartboards; works offline once loaded.
Looking for a fixed length? Try the ready-made 5-minute timer, 10-minute timer or 15-minute timer — or the seasonal Christmas countdown and Halloween countdown.
FAQ
How do I set a timer for my class?
Pick a preset (1, 2, 3, 5, 10…120 minutes) or type minutes:seconds and press Enter, then Start. The digits are sized to be read from the back row.
Does the timer make a sound?
Yes — a triple chime plays when time is up (with a visible “Time's up!” flash), and you can mute it with one click.
Is there a stopwatch?
Yes — switch to Stopwatch mode for counting up: quizzes, clean-up races, fluency checks.
Does it work in fullscreen on a projector?
Yes — the Fullscreen button hides everything else for pure presentation mode.
Need exactly 7 minutes?
Type 7 in the minutes box and press Enter, or visit the dedicated 7-minute timer page. We have a ready-made page for every length from 1 to 60 minutes plus 90 and 120.
Will it keep running if I switch tabs?
Yes — the countdown is anchored to a target timestamp, not to ticks, so it stays accurate even if the tab throttles in the background.