Time Zone Converter
Convert any date and time between 400+ world time zones — with daylight saving handled automatically. Compare up to four zones side by side and see exactly how many hours ahead or behind each one is.
Convert time zones
The date and time you enter is read as a wall-clock time in the source time zone. Your own zone is pre-selected automatically.
Offsets are computed for your exact date, so spring-forward and fall-back transitions are handled correctly.
The full IANA time zone database — every city zone your browser knows, searchable as you type.
Unlimited conversions in your browser. Nothing is uploaded or tracked.
How to use
- 1Enter a date and time
Pick the date and time using the picker, or hit “Use current time” to start from right now.
- 2Set the source zone
Type to search 400+ zones. Your own time zone is pre-selected, and the time you entered is read in this zone.
- 3Add comparison zones
Add up to four target zones. Each one instantly shows the converted time, its UTC offset, and how far ahead or behind the source it is.
- 4Schedule with confidence
Use the side-by-side times to pick meeting slots that work on both sides of the planet — DST included.
Features
Conversions use your browser’s built-in time zone database, so the correct offset applies for your exact date — including the tricky spring-forward and fall-back weekends.
Line up to four zones next to your source time. Perfect for distributed teams, international calls, and travel planning.
Every result shows the UTC offset plus a plain-English difference like “6 hours ahead of source” — no mental math.
Just start typing a city or region — “tokyo”, “london”, “chicago” — and pick from the filtered list of 400+ IANA zones.
Convert historical timestamps or plan months ahead. Offsets always reflect the rules in force on the date you enter.
Everything runs locally with the Intl API built into your browser. No server calls, no tracking, no signup.