Online Stopwatch : How to Use
What is an Online Stopwatch? The CalculatorUp Online Stopwatch is a fast, no-frills tool for measuring elapsed time . Start, pause, resume, record laps, and reset—right in your browser. No sign-up, no downloads. Key Features One-click start/pause/reset Lap & split times with running totals Millisecond precision display (00:00:00.000) Dark/Light mode that remembers your choice Fullscreen focus mode for workouts or presentations Auto-resume : Keeps time even if you switch tabs (syncs with system clock) Mobile friendly : Works great on iOS/Android Privacy-first : Everything runs in your browser; no data leaves your device How to Use Press Start (or hit Space ). Click Lap (or press L ) to capture splits. Press Pause to stop; Resume to continue. Use Reset to clear time and laps. Common Uses Fitness intervals and running splits Cooking prep and rest times Study sessions and productivity sprints Classroom experiments or ...