How do I calculate time difference between two cities?

Select two cities in the calculator above to see their exact time difference in hours and minutes, including DST adjustments.

Does this account for daylight saving time?

Yes — this calculator automatically accounts for DST. It shows the current real-time offset between any two locations.

What are the best times for international meetings?

The calculator shows overlapping business hours (9 AM–5 PM local). Generally, early morning in the US overlaps with afternoon in Europe, and late afternoon in the US overlaps with morning in Asia.

Time Difference Calculator

Compare time zones of any two cities. See exact difference, current times, and overlapping business hours.

City A

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City B

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0h difference

Overlapping Business Hours

Select two cities to see when both are at work.

Popular City Pairs

Click to compare instantly:

New York ↔ London New York ↔ Tokyo LA ↔ Mumbai London ↔ Shanghai Berlin ↔ Tokyo New York ↔ Paris Chicago ↔ Seoul Kiev ↔ Los Angeles

Frequently Asked Questions

How do you calculate time difference?

We use the IANA time zone database with real-time UTC offsets, including daylight switching. The result shows the exact difference right now.

Does this work for half-hour time zones?

Yes — zones like India (UTC+5:30), Nepal (UTC+5:45), and Iran (UTC+3:30) are fully supported.

What are the worst time zones for cross-continental meetings?

PST/JST and HST/Europe pairs have the least overlap. A 9 AM in Tokyo is 5 PM previous-day in New York — nearly impossible for real-time meetings.

Is there a way to find the best meeting time?

Yes — check our Meeting Planner for a visual overlap grid across multiple cities.