Time Difference Calculator

Select two cities below to see their live time difference, UTC offsets, overlapping business hours, and the best times to schedule meetings across time zones.

Compare two cities

First city

Second city

Popular Time Difference Comparisons

New York vs London

United States · United Kingdom

New York vs Tokyo

United States · Japan

London vs Dubai

United Kingdom · United Arab Emirates

London vs Singapore

United Kingdom · Singapore

New York vs Los Angeles

United States · United States

New York vs Paris

United States · France

Sydney vs London

Australia · United Kingdom

Dubai vs New York

United Arab Emirates · United States

Tokyo vs London

Japan · United Kingdom

Berlin vs New York

Germany · United States

Toronto vs London

Canada · United Kingdom

Chicago vs Tokyo

United States · Japan

Sydney vs New York

Australia · United States

Singapore vs New York

Singapore · United States

Paris vs Tokyo

France · Japan

Moscow vs New York

Russia · United States

Amsterdam vs New York

Netherlands · United States

Zurich vs New York

Switzerland · United States

Seoul vs London

South Korea · United Kingdom

Beijing vs New York

China · United States

Mumbai vs London

India · United Kingdom

Johannesburg vs London

South Africa · United Kingdom

Cairo vs New York

Egypt · United States

Bangkok vs London

Thailand · United Kingdom

How the Time Difference Calculator Works

Each city page shows live, ticking clocks for both locations using the IANA timezone database — so Daylight Saving Time is always accounted for automatically.

The business-hours overlap table maps each hour of the standard 9 AM – 6 PM working day in the first city to the corresponding local time in the second city, highlighting hours that fall within business hours in both locations.

UTC offsets are computed in real time so the displayed difference is always accurate, even during DST transitions when offsets can shift by one hour.