ストップウォッチ
シンプルなストップウォッチで経過時間を計測。
00:00:00.00
Hours · minutes · seconds · centiseconds
プリセットページ
- Simple online stopwatch
Start, pause, lap, and export splits — lightweight stopwatch in your browser.
- Online stopwatch with laps
No install: measure elapsed time with millisecond display and lap memory.
- Lap timer online
Record lap splits for running, meetings, or experiments with one click.
- Split timer online
Capture split times and copy results for logs, coaching, or research.
- Study stopwatch online
Track how long you study per session with laps for each topic block.
- Sports stopwatch online
High-precision timing with centiseconds for training and informal events.
- Meeting timer stopwatch
Time-box discussions and capture segment lengths with lap export.
- Cooking stopwatch online
Measure multi-step recipe stages with laps for each phase.
- Lab stopwatch online
Simple elapsed-time tool for classroom demos and quick measurements.
- Classroom stopwatch online
Large readable digits for projector use — laps for activities and tests.
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