🌍 Time Zone Calculator
Scheduling across continents means adding or subtracting whole hours from a clock time — easy to flub when the result crosses midnight. Enter the time and both zones; the calculator handles the wrap-around and flags day changes.
Offsets are fixed standard offsets; daylight saving is not applied, so double-check during DST changeover weeks.
How to use this calculator
Enter a time and pick the zone it is in and the zone you want, and the calculator converts the time, flagging any day change.
- Enter the Time using the time picker.
- Pick the From zone, where the time currently applies.
- Pick the To zone you want the time converted into.
- Read the converted time and note any next-day or previous-day message.
Frequently asked questions
How does the Time Zone Calculator work?
It shifts the entered time by the difference between the two zones' UTC offsets, wrapping around midnight when needed and telling you if the result lands on a different day.
Can you give a worked example?
09:00 in New York (UTC-5) becomes 14:00 in London (UTC+0), a 5 hour shift. 22:00 in Los Angeles (UTC-8) becomes 16:00 the next day in Sydney (UTC+10).
Which zones are included?
Eight major zones: Los Angeles, New York, London, Berlin, Dubai, Karachi, Singapore and Sydney, each with its standard UTC offset.
Does it handle daylight saving time?
No. Offsets are fixed standard offsets, so during DST changeover weeks verify the current local offset for the cities involved.