About this online clock
This page shows the exact time on your device, with seconds, in large numbers you can read from across the room. Tap Full screen to turn any phone, tablet or computer into a desk clock, a classroom clock or a kitchen clock.
Switch between 12-hour and 24-hour time, or hide the seconds for a calmer view. The clock keeps running while the page is open, and the time zone boxes show the time across the United States at a glance.
How accurate is it?
The clock reads the time from your device. Phones and most computers set their time automatically from the internet, so the clock is usually correct to within a second. If the time looks wrong, check the date and time settings on your device.