Time Zone Converter
Convert between UTC offsets and major time zones.
Enter a UTC offset to see what time it is in other zones, or look up common time zone abbreviations.
Enter a time and UTC offset — see the equivalent in other zones.
Time zones are defined as offsets from UTC (Coordinated Universal Time).
Major time zones:
| Abbreviation | Name | UTC Offset |
|---|---|---|
| HST | Hawaii Standard Time | UTC-10 |
| AKST | Alaska Standard Time | UTC-9 |
| PST | Pacific Standard Time | UTC-8 |
| MST | Mountain Standard Time | UTC-7 |
| CST | Central Standard Time | UTC-6 |
| EST | Eastern Standard Time | UTC-5 |
| AST | Atlantic Standard Time | UTC-4 |
| GMT/UTC | Greenwich Mean Time | UTC+0 |
| CET | Central European Time | UTC+1 |
| EET | Eastern European Time | UTC+2 |
| MSK | Moscow Standard Time | UTC+3 |
| IST | India Standard Time | UTC+5:30 |
| CST (CN) | China Standard Time | UTC+8 |
| JST | Japan Standard Time | UTC+9 |
| AEST | Australian Eastern Time | UTC+10 |
| NZST | New Zealand Standard Time | UTC+12 |
Note: Daylight saving time (DST) shifts most zones by +1 hour.
Fixed offsets are the honest way to show how zones line up, but they can’t capture the part that actually trips up scheduling: daylight saving time. Many regions shift by an hour for part of the year, and crucially they don’t all switch on the same date, so the gap between two cities can change several times across the year. Before booking a cross-border call, confirm whether either side is currently on summer time.
Two quirks are worth remembering. Offsets aren’t all whole hours, as the India row above shows at UTC+5:30, and Nepal goes further to UTC+5:45. And the International Date Line means some neighbors sit nearly a full day apart, so you can cross a short stretch of ocean and land on a different calendar date. An offset explains the clock, but not always the date.
How we build and check this converter
This converter runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
SuperGlobalCalculator is independently built and maintained. See how we build and verify our calculators.