Time Difference Calculator

Compare time zones and see the time difference instantly

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First Time Zone
London
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Second Time Zone
New York
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Time Difference
0 hours
Select time zones to see the difference

HOW IT WORKS

This calculator shows the current time in two different time zones and calculates the exact time difference between them. Perfect for scheduling international meetings or calls. The time updates every second automatically.

UNDERSTANDING TIME ZONES

UTC (Coordinated Universal Time): The worldwide time standard. All time zones are defined as offsets from UTC (e.g., UTC+5:30 for India, UTC-5 for New York EST).

GMT (Greenwich Mean Time): Historically equivalent to UTC, but technically different. GMT is a time zone used in UK winter, while UTC is a time standard never affected by DST.

Half-hour and 45-minute zones: Not all time zones are whole hours. India is UTC+5:30, Nepal is UTC+5:45, Australia (Adelaide) is UTC+9:30.

SCHEDULING GLOBAL MEETINGS

US-Europe (EST-CET): 6 hour difference. A 10 AM New York meeting is 4 PM in Paris/Berlin.

US-Asia (PST-JST): 16-17 hour difference. A Monday 6 PM LA meeting is Tuesday 11 AM Tokyo.

Europe-Asia (CET-IST/SGT): 4.5-7 hour difference. 10 AM Berlin = 2:30 PM Mumbai, 5 PM Singapore.