Convert IST to EST
To convert IST to EST: 2:00 PM IST is 3:30 AM EST. IST is UTC+05:30 and EST is UTC-05:00, so EST is 10 hours 30 minutes behind IST, but not all year, as explained below.
In Eastern Standard Time
- On a 24-hour clock
- 14:00 IST is 03:30 EST
- The offsets
- IST is UTC+05:30, EST is UTC-05:00
- Difference
- EST is 10 hours 30 minutes behind IST
- 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.
- IST is E* (Echo, starred: off the whole hour), EST is R (Romeo)
- In every zone
- HST 22:30 AKST 23:30 PST 00:30 AKDT 00:30 MST 01:30 PDT 01:30 CST 02:30 MDT 02:30 EST 03:30 CDT 03:30 EDT 04:30 UTC 08:30 GMT 08:30 BST 09:30 CET 09:30 CEST 10:30 EET 10:30 EEST 11:30 MSK 11:30 IST 14:00 SGT 16:30 HKT 16:30 JST 17:30 AEST 18:30 AEDT 19:30 NZST 20:30 NZDT 21:30
How the Time Zone Converter works
India Standard Time (IST) is UTC+05:30 and Eastern Standard Time (EST) is UTC-05:00, so converting IST to EST means subtracting 10 hours 30 minutes from the IST time. EST is 10 hours 30 minutes behind IST.
Worked through: 2:00 PM IST is 3:30 AM EST.
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 or ten and a half hours back, depending on the time of year, which makes this the hardest working pair in offshore software. India has no daylight saving and the US does, so the gap is 10:30 in winter and 9:30 in summer. It moves twice a year while India's clocks never do, so the change arrives entirely from the American end and surprises the Indian end. The practical overlap is a narrow window: 18:30 in Bengaluru is 08:00 in New York in winter and 09:00 in summer, which is why so many India-US handover calls sit in the Indian evening.
One thing worth stating plainly, because it is the most common mistake in this whole subject: an abbreviation is not a place. IST is fixed, so it is the same all year. EST is likewise only in force for part of the year in New York; otherwise it is EDT at UTC-04:00. 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 IST to EST are the same question in two vocabularies, which is why this converter answers both.
Common times for this pair:
- 9:30 AM IST is 11:00 PM EST the previous day - 2:00 PM IST is 3:30 AM EST - 6:30 PM IST is 8:00 AM EST - 8:00 PM IST is 9:30 AM EST
Time Zone Converter FAQ
What is the time difference between IST and EST?
EST is 10 hours 30 minutes behind IST. IST is UTC+05:30 and EST is UTC-05:00, and both offsets are definitions rather than measurements, so the subtraction is exact.
What time is 2:00 PM IST in EST?
2:00 PM IST is 3:30 AM EST. Subtract 10 hours 30 minutes and carry the date if it crosses midnight.
Does the difference between IST and EST 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 or ten and a half hours back, depending on the time of year, which makes this the hardest working pair in offshore software. India has no daylight saving and the US does, so the gap is 10:30 in winter and 9:30 in summer. It moves twice a year while India's clocks never do, so the change arrives entirely from the American end and surprises the Indian end. The practical overlap is a narrow window: 18:30 in Bengaluru is 08:00 in New York in winter and 09:00 in summer, which is why so many India-US handover calls sit in the Indian evening.
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.