Convert EST to IST
To convert EST to IST: 9:00 AM EST is 7:30 PM IST. EST is UTC-05:00 and IST is UTC+05:30, so IST is 10 hours 30 minutes ahead of EST, but not all year, as explained below.
In India Standard Time
- On a 24-hour clock
- 09:00 EST is 19:30 IST
- The offsets
- EST is UTC-05:00, IST is UTC+05:30
- Difference
- IST is 10 hours 30 minutes ahead of EST
- Date
- Same calendar day.
- This gap does NOT hold all year Convert through the offset in force on the date you care about.
- The two ends switch on different dates, or one does not switch at all.
- EST is only in force part of the year United States: daylight time starts the second Sunday in March, at 02:00 local time and ends the first Sunday in November, at 02:00 local time (Energy Policy Act of 2005, in force since 2007). In 2026 that is 2026-03-08 to 2026-11-01. New York is on EDT between those dates.
- otherwise EDT, UTC-04:00
- Military time zone letters Z (Zulu) is UTC. A to M run east of Greenwich an hour apart, N to Y west, and J is left out. A letter names an offset, so a zone that switches to daylight time changes letter: EST is R, EDT is Q.
- EST is R (Romeo), IST is E* (Echo, starred: off the whole hour)
- In every zone
- HST 04:00 AKST 05:00 PST 06:00 AKDT 06:00 MST 07:00 PDT 07:00 CST 08:00 MDT 08:00 EST 09:00 CDT 09:00 EDT 10:00 UTC 14:00 GMT 14:00 BST 15:00 CET 15:00 CEST 16:00 EET 16:00 EEST 17:00 MSK 17:00 IST 19:30 SGT 22:00 HKT 22:00 JST 23:00 AEST 00:00 AEDT 01:00 NZST 02:00 NZDT 03:00
How the Time Zone Converter works
Eastern Standard Time (EST) is UTC-05:00 and India Standard Time (IST) is UTC+05:30, so converting EST to IST means adding 10 hours 30 minutes to the EST time. IST is 10 hours 30 minutes ahead of EST.
Worked through: 9:00 AM EST is 7:30 PM IST.
The gap between these two is not the same all year, which is the thing to get right. IST never shifts and EST does, so the difference moves. Convert through the offset in force on the date you care about rather than through the abbreviation somebody typed; the offsets above are definitions and the abbreviation is a claim about the calendar.
Nine and a half to ten and a half hours forward, and the direction that almost always lands on the next day in India: anything after 13:30 Eastern is tomorrow in Mumbai. For a New York team scheduling with an Indian one, the useful fact is that a 09:00 Eastern start is 19:30 in India in winter and 18:30 in summer. That is late, but inside the working evening, and it is the overlap the offshore model is built on.
One thing worth stating plainly, because it is the most common mistake in this whole subject: an abbreviation is not a place. EST is Eastern Standard Time, which New York uses only part of the year; the rest of the time it is on EDT at UTC-04:00. IST does not shift. If what you have is a city and a date rather than a pair of abbreviations, that is a different question and needs the tz database, not arithmetic. This is also why the shifting designations exist: ET means Eastern time whichever of the two is in force. Searching for ET and searching for EST to IST are the same question in two vocabularies, which is why this converter answers both.
Common times for this pair:
- 8:00 AM EST is 6:30 PM IST - 9:00 AM EST is 7:30 PM IST - 1:30 PM EST is 12:00 AM IST the next day - 5:00 PM EST is 3:30 AM IST the next day
Time Zone Converter FAQ
What is the time difference between EST and IST?
IST is 10 hours 30 minutes ahead of EST. EST is UTC-05:00 and IST is UTC+05:30, and both offsets are definitions rather than measurements, so the subtraction is exact.
What time is 9:00 AM EST in IST?
9:00 AM EST is 7:30 PM IST. Add 10 hours 30 minutes and carry the date if it crosses midnight.
Does the difference between EST and IST change with daylight saving?
Yes, and this is the main thing to watch on this pair. IST is fixed and EST shifts by an hour for part of the year, so the difference takes more than one value across the year. In 2026 the United States switch runs from 2026-03-08 to 2026-11-01.
Is there anything specific to this pair worth knowing?
Nine and a half to ten and a half hours forward, and the direction that almost always lands on the next day in India: anything after 13:30 Eastern is tomorrow in Mumbai. For a New York team scheduling with an Indian one, the useful fact is that a 09:00 Eastern start is 19:30 in India in winter and 18:30 in summer. That is late, but inside the working evening, and it is the overlap the offshore model is built on.
Someone wrote EST but it is summer. What do they mean?
Almost certainly the zone rather than the abbreviation: New York time, which in summer is EDT at UTC-04:00 rather than EST at UTC-05:00. People type the standard-time abbreviation all year round. If an invitation is an hour out from what you calculated, this is why.