Time Zone Calculator
Compare time zones across locations, convert times instantly, and plan international meetings
Select Time & Date
Selected Time:
-
Compare Time Zones
London, UK
GMT (No DST)
12:00 PM
Same time
New York, USA
EST (DST ends Nov 5)
7:00 AM
5 hours behind
Meeting Planner
Find the best time for participants in different time zones
| Time | London | New York | Tokyo |
|---|---|---|---|
| 9:00 AM - 10:00 AM | 9:00 AM | 4:00 AM | 6:00 PM |
| 12:00 PM - 1:00 PM | 12:00 PM | 7:00 AM | 9:00 PM |
| 3:00 PM - 4:00 PM | 3:00 PM | 10:00 AM | 12:00 AM |
About Time Zone Calculator
This tool helps you navigate time differences across the world. With over 500 supported locations, you can:
- Convert times between any two time zones instantly
- Compare multiple locations at once
- Plan international meetings with the meeting planner
- Account for Daylight Saving Time automatically
- View time differences at a glance
How Time Zones Work
The Earth is divided into 24 time zones, each approximately 15 degrees of longitude wide. Time zones are centered on meridians of longitude and generally follow country borders for practicality.
Daylight Saving Time
Many regions observe Daylight Saving Time (DST), advancing clocks during summer months. Our calculator automatically adjusts for DST based on each location's rules.
Pro Tip: For business hours (9 AM - 5 PM) overlap between locations, use the meeting planner to find the best window for all participants.
Popular Time Zone Conversions
| Location Pair | Standard Time Difference | DST Time Difference |
|---|---|---|
| New York ↔ London | 5 hours | 4 hours (Mar-Nov) |
| London ↔ Dubai | 4 hours | 3 hours (Mar-Oct) |
| Tokyo ↔ Sydney | 1 hour | 2 hours (Oct-Apr) |
| Los Angeles ↔ New York | 3 hours | 3 hours |