Afternoon finish
Countdown started at 1:00 PM for a 5:00 PM finish
Already know when work ends? Set that time directly and run a live countdown. The saved end time is restored after a refresh on this device.
You know the finish time
Ends today
The formula
The timer uses an absolute end time instead of subtracting one second repeatedly. That lets it correct itself when a browser tab is slowed down in the background.
Real examples
Countdown started at 1:00 PM for a 5:00 PM finish
Countdown started at 4:15 PM for 5:30 PM
At 10:00 PM, set the next occurrence of 6:00 AM
Good to know
Answers
Yes. Browsers may slow visual updates in the background, but the timer recalculates from the saved end timestamp when you return.
Not reliably in this version. Keep the tab or installed app open for the best chance of a system notification.
Use the main Clock Out Calculator. It finds the end time from your clock-in, required hours and unpaid break.