Time Zone Calculator
Convert time between different time zones worldwide. Perfect for scheduling meetings, planning travel, and coordinating with global teams.
Source Time
Convert To
Quick Presets
Converted Times
Time Zone Information
Meeting Time Suggestions
How to Use This Time Zone Calculator
To convert time between time zones:
- Enter the source date and time you want to convert
- Select the source time zone
- Add target time zones using "Add Time Zone" button
- View converted times instantly for all selected time zones
- Use "Current Time" button to quickly set the current date and time
- Try quick presets for common time zone combinations
Understanding Time Zones
Time zones are regions of the Earth that have the same standard time. Key concepts:
- UTC (Coordinated Universal Time): The primary time standard by which the world regulates clocks and time
- GMT (Greenwich Mean Time): Often used interchangeably with UTC, based on the mean solar time at Greenwich, London
- Daylight Saving Time (DST): Practice of advancing clocks during warmer months to make better use of daylight
- Time Zone Offset: The difference in hours and minutes from UTC (e.g., EST is UTC-5)
Example Conversion
Converting 3:00 PM EST to other time zones:
- EST (UTC-5): 3:00 PM
- PST (UTC-8): 12:00 PM (3 hours behind)
- GMT (UTC+0): 8:00 PM (5 hours ahead)
- JST (UTC+9): 5:00 AM next day (14 hours ahead)
Note: These examples assume standard time (no daylight saving).
Frequently Asked Questions
How does daylight saving time affect conversions?
Daylight saving time shifts the local time by one hour. This calculator automatically accounts for DST based on the current date and time zone rules.
What's the difference between GMT and UTC?
GMT and UTC are often used interchangeably for practical purposes. UTC is the modern standard, while GMT is based on the mean solar time at Greenwich. The difference is usually less than a second.
How do I schedule meetings across time zones?
Use the meeting time suggestions feature to find suitable times for all participants. Consider business hours (typically 9 AM - 5 PM) in each time zone when scheduling.