Timers

Online Clock and Watch Display

By 3 min read Evidence based

See the exact time in large digital numbers or on an analog watch face. Choose 12 or 24 hour time, pick a time zone and go full screen to use a spare screen as a clock.

Online clock and watch display

Show a big digital clock or an analog watch face. Go full screen to use a spare phone or tablet as a desk clock.

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On this page
  1. What this clock does
  2. Using it as a bedside clock
  3. Planning across time zones

What this clock does

  • Digital view with seconds and the full date.
  • Analog watch view with hour, minute and a red second hand.
  • 12 hour and 24 hour formats.
  • 16 popular time zones, useful for family abroad, travel and remote work.
  • Full screen mode for a desk, kitchen or study clock.

Using it as a bedside clock

Sleep experts advise keeping bright screens out of the bedroom. If you use a screen as a clock, lower the brightness, turn the device so that the screen faces away, and avoid checking the time during the night because it raises worry about sleep. Choose your wake time with the wake up time calculator and set an alarm instead.

Planning across time zones

If you work with people in the United States, United Kingdom, Singapore or Australia, the zone list shows their local time at once. Pair it with the jet lag calculator before long trips so your sleep adjusts on time.

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Frequently asked questions

Is the time exact?

It reads the clock of your device, which is normally synced with internet time servers, and updates four times a second.

Can I use it as a watch on a spare phone?

Yes. Open this page, choose the analog view and press Full screen. Keep the device plugged in.

Does it work in other time zones?

Yes. Choose a city from the list to see its local time.

Why is full screen not working?

Some browsers on iPhone do not allow full screen for web pages. Use Add to Home Screen or rotate the phone to landscape.

Medical references: for evidence based health information see CDC Sleep and Sleep Disorders, NIH NHLBI on Sleep Deprivation, American Academy of Sleep Medicine Sleep Education and MedlinePlus. This page is general information, not medical advice.