What is the time difference between India and New York?
New York runs 10.5 hours behind India in January. That gap shrinks to 9.5 hours in July. The shift is entirely on the US side. India stays locked at UTC+5:30.
The table below gives the offset for every region. Where you see two numbers, the first is the winter gap and the second is the summer gap. India never moves.
All offsets are calculated from IST = UTC+5:30, the fixed reference for the entire country.
Why does the IST offset change for other countries?
India does not observe daylight saving time. The offset stays UTC+5:30 every day of the year. When New York shows a 10.5-hour gap in January and a 9.5-hour gap in July, it is because the US changes its clocks. India stays put.
IST vs North America
| City | Offset from IST | When |
|---|---|---|
| New York (Eastern) | 10.5 hours behind | US winter (EST) |
| New York (Eastern) | 9.5 hours behind | US summer (EDT) |
| Chicago (Central) | 11.5 hours behind | US winter (CST) |
| Chicago (Central) | 10.5 hours behind | US summer (CDT) |
| Los Angeles (Pacific) | 13.5 hours behind | US winter (PST) |
| Los Angeles (Pacific) | 12.5 hours behind | US summer (PDT) |
IST vs Europe
| City | Offset from IST | When |
|---|---|---|
| London (GMT/BST) | 5.5 hours behind | UK winter (GMT) |
| London (GMT/BST) | 4.5 hours behind | UK summer (BST) |
| Paris (CET/CEST) | 4.5 hours behind | Europe winter (CET) |
| Paris (CET/CEST) | 3.5 hours behind | Europe summer (CEST) |
IST vs Asia-Pacific
| City | Offset from IST | Note |
|---|---|---|
| Singapore | 2.5 hours ahead | Fixed, no DST |
| Tokyo | 3.5 hours ahead | Fixed, no DST |
| Sydney | 5.5 hours ahead | Australian winter (AEST) |
| Sydney | 4.5 hours ahead | Australian summer (AEDT) |
IST vs Middle East and Africa
| City | Offset from IST | Note |
|---|---|---|
| Dubai (GST) | 1.5 hours behind | Fixed, no DST |
| Johannesburg (SAST) | 3.5 hours behind | Fixed, no DST |
IST vs South America
| City | Offset from IST | When |
|---|---|---|
| São Paulo (BRT) | 8.5 hours behind | January |
| São Paulo (BRT) | 8.5 hours behind | July |
For a specific date and time, use the IST Converter. If you need the full explanation of why India uses a half-hour offset, read Why Is India's Time Zone Half an Hour Off? For the basics of IST itself, see What Is Indian Standard Time?
Who should do something different: If you are scheduling a recurring meeting with a team in the US or Europe, do not use the winter offset as your default. Set the meeting window using the summer gap, or check the DST calendar for the other country each March and November. The IST converter can handle this automatically.