Stopwatch & Alarms
Fullscreen Stopwatch
A stopwatch that fills the whole screen.
How to use the fullscreen stopwatch
- Press Start or the Space key.
- Press Lap (L) to record split times.
- Press Reset (R) to clear, or copy laps as CSV.
Open fullscreen to time races, presentations or lab work from across the room.
Tips
Use laps to compare repeated efforts, such as practice runs or student presentations, without stopping the clock. Copy the laps as CSV to paste them into a spreadsheet.
Frequently asked questions
How precise is the stopwatch?
It shows milliseconds and is computed from timestamps, so display delays do not cause drift.