What does this tool do?
A time-zone difference is the gap between two UTC offsets. This calculator shows which zone is ahead, the size of the difference and the local time in both places.
The Formula
Difference = offset B − offset A; local time B = local time A + differenceFrequently Asked Questions
Why is the difference not always a whole number of hours?
Some zones use 30- or 45-minute offsets. For example, India is UTC+5:30, so the gap with London can be 5.5 hours.
Does this handle daylight saving time?
No. The calculator uses the offsets you select as fixed values. During daylight saving, a zone may be one hour ahead of its standard offset.