Convert time between any two time zones instantly. Supports all major time zones worldwide.
The world is divided into 24 primary time zones, each roughly 15 degrees of longitude wide. UTC (Coordinated Universal Time) serves as the reference point. Time zones range from UTC-12 (Baker Island) to UTC+14 (Line Islands, Kiribati).
India uses a single time zone (IST = UTC+5:30) across the entire country, despite spanning about 30 degrees of longitude. Some countries, like Nepal (UTC+5:45) and Chatham Islands (UTC+12:45), use 45-minute offsets.
| Time Zone | City | Difference from IST |
|---|---|---|
| EST | New York | -10:30 |
| PST | Los Angeles | -13:30 |
| GMT | London | -5:30 |
| CET | Berlin | -4:30 |
| GST | Dubai | -1:30 |
| JST | Tokyo | +3:30 |
| AEST | Sydney | +4:30 |
India Standard Time (IST) is UTC+5:30 — one of the few half-hour offsets in the world. Use this table to quickly calculate the time difference between IST and major time zones.
| Time Zone | Offset | Difference from IST |
|---|---|---|
| IST (India) | UTC+5:30 | — |
| EST (New York) | UTC-5:00 | IST is 10h 30m ahead |
| PST (Los Angeles) | UTC-8:00 | IST is 13h 30m ahead |
| GMT (London) | UTC+0:00 | IST is 5h 30m ahead |
| CET (Berlin) | UTC+1:00 | IST is 4h 30m ahead |
| JST (Tokyo) | UTC+9:00 | IST is 3h 30m behind |
| AEST (Sydney) | UTC+10:00 | IST is 4h 30m behind |
| GST (Dubai) | UTC+4:00 | IST is 1h 30m ahead |
For teams spanning India and the US East Coast, the best overlap window is 6:00 PM – 9:00 PM IST (8:30 AM – 11:30 AM EST). For India–West Coast teams, try 8:00 PM – 11:00 PM IST (7:30 AM – 10:30 AM PST). These windows give both sides reasonable working hours.
India (IST) is UTC+5:30. The difference depends on the US timezone: IST is 10 hours 30 minutes ahead of EST (New York), 13 hours 30 minutes ahead of PST (Los Angeles), and 11 hours 30 minutes ahead of CST (Chicago).
Yes. This tool uses the JavaScript Intl.DateTimeFormat API, which automatically handles daylight saving time transitions for all time zones. The converted time will always be correct regardless of the season.
UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. It is the successor to GMT (Greenwich Mean Time) and serves as the reference point for all time zones. UTC does not observe daylight saving time.
India's 30-minute offset is due to its geographic position. The country spans roughly 77-78 degrees east longitude, which falls between two standard time meridians (75E and 90E). India chose a single time zone for the entire country, resulting in the half-hour offset.
Select IST (India) as the source time zone and EST (New York) as the target. Enter the time you want to convert. IST is 10.5 hours ahead of EST during standard time and 9.5 hours ahead during US daylight saving time (March-November).
India (IST) is 10 hours 30 minutes ahead of US East Coast (EST) during standard time, and 9 hours 30 minutes ahead during daylight saving time. IST is 13 hours 30 minutes ahead of US West Coast (PST).
No, IST is 10 hours 30 minutes ahead of EST (not 12). This is because IST is UTC+5:30 and EST is UTC-5:00. The total difference is 5.5 + 5 = 10.5 hours.
IST is 5 hours 30 minutes ahead of GMT. To convert IST to GMT, subtract 5 hours 30 minutes. For example, 6:00 PM IST = 12:30 PM GMT.
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