Time Zone Converter
Use this free online Time Zone Converter to convert any date and time across world cities — including Sydney, Melbourne, Perth, Brisbane, London, New York, Tokyo and any other zone in the IANA database. It is useful for booking international meetings, scheduling calls with overseas family, planning a flight arrival, broadcasting a livestream to multiple regions, and coordinating remote teams across continents. Pick a date, a time and a source zone, then select one or many destination zones to see the equivalent local time side-by-side. Daylight-saving transitions are handled automatically using the browser's built-in timezone data. Runs entirely in your browser, no sign-up.
Hold Cmd/Ctrl to select multiple.
How to Use This Time Zone Converter
Converting time zones takes about ten seconds — pick the moment and the destinations.
- Pick the date you want to convert.
- Pick the time on that date.
- Choose the source time zone (the zone the time is currently in).
- Hold Cmd or Ctrl and click multiple destination zones in the comparison list.
- Click Convert to see a side-by-side table of equivalent local times in each selected zone.
Example Calculation
10:00 am Sydney time on Thursday 7 May 2026 (AEST) converts to 1:00 am London time (BST), 8:00 pm New York time on the previous day (EDT), and 9:00 am Tokyo time (JST). Daylight-saving differences are handled automatically — useful when scheduling a conference call between Australian, European and US teams without anyone having to do the maths in their head.
How This Time Zone Converter Works
Earth's rotation means different parts of the planet experience local noon at different moments. Time zones standardise this into bands roughly an hour wide, anchored to Coordinated Universal Time (UTC). Most zones offset by a whole number of hours from UTC, but India (+5:30), Newfoundland (−3:30), Nepal (+5:45) and parts of Australia (+8:45 in the south-west) use sub-hour offsets. Daylight Saving Time complicates conversions because zones shift their offset by one hour twice a year, on dates that vary by jurisdiction. The calculator uses the IANA timezone database — the same data source most operating systems and programming languages rely on — accessed through the browser's Intl.DateTimeFormat API. That means the result is correct for any historical or future date, including dates inside DST transition weekends. The conversion works by interpreting the entered wall-clock time in the source zone, computing the corresponding UTC instant, and then re-formatting that instant into each destination zone. Multi-zone tables are useful for picking a meeting time that lands inside everyone's working hours.
Last updated: May 2026.
Frequently Asked Questions
What is UTC and why is it used?
Coordinated Universal Time is the global reference time, equivalent to GMT. Servers, schedulers, and air-traffic systems use UTC to avoid the ambiguity of local time zones.
Why are some time zones offset by 30 or 45 minutes?
Several countries chose offsets that better match their solar noon. India uses UTC+5:30, parts of Australia use +9:30 and +8:45, and Nepal uses +5:45.
Does this calculator handle daylight saving correctly?
Yes — it uses the browser's built-in IANA timezone database, which knows the historical and scheduled DST shifts for every zone.
How do I convert a meeting time to multiple zones at once?
Pick the source zone and time, then in the multi-select list highlight every destination zone. The result table shows them all side-by-side.
What about places with no DST?
Most of Asia, Africa, and Australia's Queensland don't observe DST. Their offset stays the same year-round and the calculator reflects this automatically.