Time Zone Converter
Convert time between different time zones instantly and view current worldwide clocks for major cities.
World Clocks
How to Use This Calculator
- Enter a time in 24-hour format (HH:MM).
- Select the source time zone from the From dropdown.
- Select the target time zone from the To dropdown.
- Click "Convert Time" to see the converted time and difference.
- Scroll down to view live world clocks for major cities worldwide.
Formula
Time zones are expressed as UTC offsets. For example, Eastern Time (UTC−5) is 5 hours behind UTC. The converter calculates the exact time difference between any two zones.
Examples
9:00 AM EST (UTC−5) = 10:00 PM CST (UTC+8). Difference = +13 hours.
12:00 PM GMT (UTC+0) = 9:00 PM JST (UTC+9). Difference = +9 hours.
2:00 PM PST (UTC−8) = 5:00 PM EST (UTC−5). Difference = +3 hours.
Frequently Asked Questions
What is UTC?
UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks and time. All time zones are defined by their offset from UTC.
Does this account for Daylight Saving Time?
This calculator uses standard time offsets. During Daylight Saving Time, add +1 hour for regions that observe it (e.g., EST becomes EDT). Always check local DST rules for precise conversions.
Why do world clocks update automatically?
The world clocks use your device’s local time and apply the UTC offset for each city to show the current time in real time.
What cities are shown in world clocks?
Major financial and population centers: London, New York, Tokyo, Shanghai, Sydney, Dubai, Mumbai, Moscow, and more.