Time Zone Calculator
Instantly convert time between any global cities, calculate time differences, and find the perfect meeting time across the world.
Calculate Time Differences
Select your base location, target location, and desired time to instantly see the converted time and exact hour difference.
Time Zone Converter
See exactly what time it is anywhere in the world.
How it Works
Mastering global time conversion
Select Base Zone
Choose your current location or the reference city for the meeting you are planning.
Choose Target Zone
Select the destination city or the location of your international colleagues or clients.
Adjust Time
Use the “Hours from Now” input to plan for future meetings (e.g., +2.5 hours for a meeting later today).
View the Conversion
Instantly see the exact local time in both locations and the precise hour difference, including DST.
Major Global Time Zones
A general overview of common time zones, their standard UTC offsets, and major cities they cover. Note: Offsets may change by ±1 hour during Daylight Saving Time.
| Time Zone | Standard UTC Offset | Major Cities | Observes DST? |
|---|---|---|---|
| UTC / GMT | UTC+0 | London (Winter), Reykjavik, Accra | No (GMT does not, BST does) |
| EST / EDT | UTC-5 / UTC-4 | New York, Toronto, Miami | Yes |
| PST / PDT | UTC-8 / UTC-7 | Los Angeles, Vancouver, Seattle | Yes |
| CET / CEST | UTC+1 / UTC+2 | Paris, Berlin, Rome, Madrid | Yes |
| IST | UTC+5:30 | Mumbai, New Delhi, Kolkata | No |
| JST | UTC+9 | Tokyo, Osaka, Seoul | No |
| AEST / AEDT | UTC+10 / UTC+11 | Sydney, Melbourne, Brisbane | Yes (except QLD, NT, WA) |
Time Zone Calculator FAQ
Answers to the most frequently asked questions about global time conversion, UTC, and Daylight Saving Time.
Select your base city and target city in the calculator, then choose the time or ‘hours from now’. The tool instantly displays the converted time and the exact hour difference, accounting for Daylight Saving Time (DST) automatically based on the date.
Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks and time. It does not observe Daylight Saving Time, making it a reliable, constant reference point for global time zone calculations, aviation, and computing.
Yes, many regions adjust their clocks forward by one hour in spring and back by one hour in autumn. Our calculator uses real-time IANA time zone data to ensure DST transitions are accurately reflected in your results for any given date.
Set your local city as the ‘Base Time Zone’, add the meeting time using the ‘Hours from now’ input, and set the attendee’s city as the ‘Target Time Zone’. The calculator will show you exactly what time the meeting will be for them, helping you find overlapping working hours.