Time zone converter
A time zone converter translates a clock time in one part of the world to the equivalent time in another, accounting for the UTC offset difference between the two zones.
Converted time
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How time zone conversion works
Every time zone has a fixed offset from UTC. To convert:
UTC time = Local time − UTC offset
Target local time = UTC time + Target offset
Example
Convert 3:00 PM New York (UTC−5) to Tokyo (UTC+9):
UTC = 15:00 − (−5) = 20:00 UTC
Tokyo = 20:00 + 9 = 05:00 next day
Frequently asked
Why might the date change?
If the offset difference carries the clock past midnight, the converted time is on the next or previous day.
Does this account for daylight saving time?
This calculator uses standard (winter) UTC offsets. DST adds +1 hour to most US and European zones in summer. For real-time DST-aware conversion, use your device's world clock.
What is UTC?
Coordinated Universal Time (UTC) is the global time reference. All other zones are expressed as UTC offset — for example, New York is UTC−5 in winter (EST) and UTC−4 in summer (EDT).
What is the difference between EST and EDT?
EST (Eastern Standard Time) is UTC−5, used in winter. EDT (Eastern Daylight Time) is UTC−4, used in summer. This calculator shows standard offsets.
How do I share my conversion?
Click "Share with my numbers" to copy a URL with your zones and time saved.