Countdown
remaining time = starting time - elapsed time
Time management tool
Countdown Timer
Set a labeled countdown, use presets, and keep recent timer sessions visible.
Tool
Set a countdown
Choose a preset or enter a custom duration, add a label, and run the countdown with saved settings.
00:15:00
Ready to start.
Custom duration
Starting Time15 min
Elapsed0 min
Completed Timers0
Recent timers
About this tool
How it works
The EngLab Countdown Timer is designed for focused work blocks, study sessions, lab timing, workouts, cooking, review intervals, and everyday reminders. It supports custom labels, quick presets, repeat mode, sound alerts, progress tracking, and recent timer history saved in the current browser.
Workflow
Process used
Progress
elapsed time / starting time x 100
Repeat mode
restart after completion when enabled
Worked example
Example workflow
Example: choose the 15 minute preset, label it Design review, start the timer, and let the page title show the remaining time while you work.
Guide
How to use this tool
- Choose a preset or enter hours, minutes, and seconds.
- Add a label if the timer is for a specific task.
- Use Start, Pause, Reset, and Add 1 min while the timer runs.
- Enable repeat mode for recurring countdowns and review recent completed timers.
Reference
What the output means
starting time
The countdown duration entered before pressing Start.
remaining time
The time left before the alert fires.
repeat mode
An option that automatically restarts the same duration after completion.
recent timers
Completed countdowns saved in this browser for quick reference.
Assumptions and limits
Before relying on the tool
- Browser audio may require a user interaction before playback.
- Very long sessions depend on the browser tab staying active.
- Settings and history are stored in this browser only.
- Use dedicated equipment for critical safety timing.
FAQ
Countdown Timer questions
Does this run in the browser?
Yes. The tool runs with JavaScript in the current browser tab.
Do I need an account?
No account or sign-in is required.
Can I use this on mobile?
Yes. The layout is responsive for phone, tablet, and desktop screens.
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