Time Zone Converter
Convert a time from one zone to another. Handles common U.S. and international time zones with daylight-saving aware UTC offsets.
What is Time Zone Converter?
The time zone converter handles the most common scheduling math: what time is it for someone in another zone right now, or when is "9 AM their time" in my zone?
Formula
New time = original time + (target UTC offset − source UTC offset). Wrap around 24:00 for next-day or previous-day shifts.
Worked example
14:00 (2 PM) New York (UTC−5) → London (UTC+0). +5 hours = 19:00 (7 PM). Same day.
How to use this calculator
- Enter time in 24-hour format.
- Pick the source and target UTC offsets.
- The target time and any day shift appear instantly.
Frequently asked questions
Does this handle daylight saving time?
The list shows summer (DST) and winter offsets where they differ. Use the offset that's currently active in the zone you're converting to.
Why is India's offset 5:30, not 5 or 6?
India uses a half-hour offset. Other half-hour zones include Iran (3:30), Afghanistan (4:30), Burma/Myanmar (6:30), and parts of Australia (9:30). Some Newfoundland time is 3:30 too.
What about the International Date Line?
Crossing it westward (e.g., Tokyo to Honolulu): you go back a day. Eastward: forward a day. The "day shift" output captures this.
Why don't all parts of a country use one zone?
The U.S., Russia, and Australia span multiple zones. China uses a single zone (Beijing time) despite spanning 5 geographic ones. Politics and convenience drive these choices.