Time Zone Converter
Convert a date and time between world time zones, with the exact time difference.
What is a time zone converter?
A time zone converter tells you what a given moment in one part of the world is in another. It is essential for scheduling international calls, catching live events, planning travel and coordinating with colleagues, friends or family across borders. This tool uses your browser's time zone database, so it handles real-world rules automatically.
How the conversion works
Every zone is defined by its offset from Coordinated Universal Time (UTC). To convert, the tool treats your chosen date and time as the wall-clock time in the source zone, works out the matching UTC instant, then displays that instant in the destination zone. It also reports the exact difference in hours between the two.
How to use this converter
Pick the date and time, choose the source and destination zones from the lists, and press Convert. You will see the equivalent local date and time in the target zone, written out in full, along with how many hours ahead or behind it is.
Daylight saving and accuracy
Many regions shift their clocks for daylight saving time during part of the year, which changes their offset. Because this converter reads live time zone rules, it accounts for those shifts on the date you enter — so a conversion in summer can differ from the same one in winter.
Frequently Asked Questions
What is the Time Zone Converter?
Convert a date and time between world time zones, with the exact time difference. It runs instantly in your browser and is completely free to use.
What do I need to enter to use the Time Zone Converter?
The Time Zone Converter is an interactive tool: type directly into it and the result updates as you go. Everything runs on your own device, so nothing you enter is sent to a server.
How accurate is the Time Zone Converter?
The Time Zone Converter uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the Time Zone Converter free, and do I need an account?
Yes. The Time Zone Converter — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.