Time Zone Converter

Convert a time between cities and time zones. Free, no sign-up, files stay on your device.

🔒 100% private — processing happens in your browser. Nothing is uploaded.

How to convert time between time zones

  1. Pick a date, a time and the time zone it is in — or press Now for the current time.
  2. Add the cities or time zones you need; the list is remembered for your next visit.
  3. Read the converted times instantly. Press ⇧ on any row to make that place the starting point.

Plan meetings, calls and webinars across the world without mistakes. This converter uses the time-zone database built into your browser (IANA tz data), so daylight saving time changes are applied correctly for the exact date you choose — for example, the gap between London and New York is usually five hours but four for a few weeks each spring and autumn. Times that do not exist because the clocks jump forward are flagged. Everything runs locally in your browser.