Countdown Timer with Laps - Online Workout & Study

A countdown timer with laps is a versatile timing tool that counts down from a set time while allowing you to record split times (laps) along the way. Each lap captures the elapsed time since the previous lap or the start. It's perfect for interval training, HIIT workouts, study sessions with checkpoints, cooking, or any activity where you need to track multiple time segments within a single countdown.

Set your total workout duration (e.g., 30 minutes), press Start, and hit the Lap button (or press L on your keyboard) at the end of each exercise set or interval. The tool records the split time for each segment, total elapsed time, and remaining time. After your workout, review all lap times to analyze your performance, track rest periods, and identify your fastest and slowest sets.

The classic Pomodoro Technique uses 25-minute focus sessions followed by 5-minute breaks. Use the 🍅 25m preset for your focus session, and optionally record laps at natural checkpoints (e.g., finishing a chapter). After the timer ends, take a short break. For longer study sessions, try the 45-minute or 60-minute presets. The lap feature helps you track how long each study subsection takes, giving you insights into your productivity patterns.

Yes! This countdown timer uses a target-timestamp-based approach rather than relying solely on setInterval ticks. It calculates remaining time by comparing the current time against the target end time, ensuring accuracy even when the browser tab is inactive or minimized. The display and page title update continuously so you can monitor progress from other tabs.

Absolutely! Use Space to start or pause the timer, R to reset, and L to record a lap. These shortcuts work when the timer area is focused, making it easy to control the timer without taking your hands off the keyboard — ideal during workouts or study sessions.

When the countdown reaches 00:00:00, the timer triggers a visual alert (the display turns red and pulses), an audio beep plays (if your browser supports it), and a toast notification appears at the top of the screen. If you've granted notification permissions, a browser notification may also appear. All lap records are preserved so you can review your session data even after the timer finishes.

• Split Time — The time elapsed since the previous lap (or since start for the first lap). This is your per-segment duration.
• Total Elapsed — The cumulative time from the start of the countdown to this lap.
• Remaining — How much time is left on the countdown clock at the moment of this lap.

The fastest split is highlighted in green, helping you quickly identify your best performance.