Time Zone Converter
Convert a date and time from one time zone to another. Enter the moment, choose your from and to zones, and see the converted time, the hour difference, and a world clock — all computed instantly in your browser.
Enter a date and time, then pick two zones to convert between them.
Understanding the Time Zone Converter
The Time Zone Converter turns a single date and time in one zone into the matching moment in another, so you never have to do the mental math again. Enter when something happens, pick the from and to zones, and it instantly shows the converted date-time, how many hours apart the two zones are, and a quick world clock for five major cities. It is ideal for scheduling calls across countries, catching a livestream, or planning travel. Everything runs in your browser using its built-in time-zone database, so it stays accurate through daylight saving changes without sending your data anywhere or needing an internet lookup.
How it works
You give the tool three things: a date, a clock time, and the zone that time belongs to (the from zone). It treats those numbers as wall-clock time in the from zone and works out the single universal instant they point to, correctly accounting for that zone's daylight saving offset on that exact date. It then re-reads that same instant through the to zone's rules and prints the local date and time there. The hour difference is simply the gap between each zone's offset at that moment, so it stays right even across a DST boundary. A world-clock row formats the same instant for several cities at once for an easy cross-check.
Worked example
Say a webinar starts at 9:00 AM on March 15 in New York and you are in Mumbai. Enter 2026-03-15 and 09:00, set the from zone to America/New_York and the to zone to Asia/Kolkata. The converter shows it begins at 6:30 PM that evening in Kolkata and reports that Kolkata is 9.5 hours ahead of New York, with London, Dubai, and Tokyo times listed alongside for quick reference.
Tips & common mistakes
- Always set the from zone to the zone the printed time belongs to, not your own zone, or the result will be shifted.
- Near a daylight saving switch, double-check the date — being one day off can change the offset by a full hour.
- Half-hour and 45-minute zones like India, Nepal, and parts of Australia are handled correctly; the difference may show as 5.5 or 9.5 hours.
- Use the 'Use current time' button to fill in this exact moment, then change only the zones to see live differences.
- IANA names follow a Region/City pattern (for example Europe/London); the city is usually the largest in that offset, not necessarily where you live.
- Scan the world-clock row to instantly judge whether a proposed meeting time is unreasonably early or late for other regions.
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Frequently Asked Questions
Does it handle daylight saving time?
Yes. The converter relies on your browser’s built-in IANA time-zone database, which knows each zone’s daylight saving rules. Because it converts a specific date and time, it applies the correct offset for that exact moment — including DST transitions — rather than a fixed offset.
Which time zones are supported?
All IANA time zones your browser knows about — typically around 400, from America/New_York to Asia/Kolkata to Australia/Sydney. If your browser cannot list them, the tool falls back to a curated set of roughly 30 of the most common zones.
Can I see the time in multiple cities at once?
Yes. Every conversion shows a small world-clock row with the same moment in five major cities — Los Angeles, New York, London, Dubai, and Tokyo — so you can sanity-check a meeting time across regions at a glance.