Convert IST to EST
EST = IST −10 h 30 min
EST is 10 hours 30 minutes behind IST. IST is always UTC+5:30 and EST is always UTC−5, so this gap is the same on every date.
IST · India Standard Time · UTC+5:30
6:38PM
Tuesday, November 3, 2026
EST · Eastern Standard Time · UTC−5
8:08AM
Tuesday, November 3, 2026
New York is on EST (UTC−5) right now.
- Next clock change: March 14, 2027. New York moves to EDT (UTC−4), so New York is then 9 hours 30 minutes behind India.
- Next clock change: November 7, 2027. New York moves to EST (UTC−5), so New York is then 10 hours 30 minutes behind India.
IST to EST for every hour
Each EST column holds for part of the year (dates in the header for 2027). The first uses the fixed offsets (IST UTC+5:30, EST UTC−5); the others give local clock time when daylight saving time changes the gap. Until 10:30 AM IST, EST is still on the previous calendar day.
| IST | EST −10 h 30 minfixed offsets | EST −9 h 30 minMar 14 – Nov 7 | 24-hour |
|---|---|---|---|
| 12:00 AM | 1:30 PM −1 day | 2:30 PM −1 day | 00:00 → 13:30 |
| 1:00 AM | 2:30 PM −1 day | 3:30 PM −1 day | 01:00 → 14:30 |
| 2:00 AM | 3:30 PM −1 day | 4:30 PM −1 day | 02:00 → 15:30 |
| 3:00 AM | 4:30 PM −1 day | 5:30 PM −1 day | 03:00 → 16:30 |
| 4:00 AM | 5:30 PM −1 day | 6:30 PM −1 day | 04:00 → 17:30 |
| 5:00 AM | 6:30 PM −1 day | 7:30 PM −1 day | 05:00 → 18:30 |
| 6:00 AM | 7:30 PM −1 day | 8:30 PM −1 day | 06:00 → 19:30 |
| 7:00 AM | 8:30 PM −1 day | 9:30 PM −1 day | 07:00 → 20:30 |
| 8:00 AM | 9:30 PM −1 day | 10:30 PM −1 day | 08:00 → 21:30 |
| 9:00 AM | 10:30 PM −1 day | 11:30 PM −1 day | 09:00 → 22:30 |
| 10:00 AM | 11:30 PM −1 day | 12:30 AM | 10:00 → 23:30 |
| 11:00 AM | 12:30 AM | 1:30 AM | 11:00 → 00:30 |
| 12:00 PM | 1:30 AM | 2:30 AM | 12:00 → 01:30 |
| 1:00 PM | 2:30 AM | 3:30 AM | 13:00 → 02:30 |
| 2:00 PM | 3:30 AM | 4:30 AM | 14:00 → 03:30 |
| 3:00 PM | 4:30 AM | 5:30 AM | 15:00 → 04:30 |
| 4:00 PM | 5:30 AM | 6:30 AM | 16:00 → 05:30 |
| 5:00 PM | 6:30 AM | 7:30 AM | 17:00 → 06:30 |
| 6:00 PM | 7:30 AM | 8:30 AM | 18:00 → 07:30 |
| 7:00 PM | 8:30 AM | 9:30 AM | 19:00 → 08:30 |
| 8:00 PM | 9:30 AM | 10:30 AM | 20:00 → 09:30 |
| 9:00 PM | 10:30 AM | 11:30 AM | 21:00 → 10:30 |
| 10:00 PM | 11:30 AM | 12:30 PM | 22:00 → 11:30 |
| 11:00 PM | 12:30 PM | 1:30 PM | 23:00 → 12:30 |
Bold rows fall inside office hours (9:00 to 17:00) on both sides. The dot marks the current IST hour.
The IST times people look up most
| IST | EST −10 h 30 min | EST −9 h 30 min |
|---|---|---|
| 9:30 PM | 11:00 AM | 12:00 PM |
| 9:30 AM | 11:00 PM −1 day | 12:00 AM |
| 1:00 AM | 2:30 PM −1 day | 3:30 PM −1 day |
| 10:30 AM | 12:00 AM | 1:00 AM |
| 10:30 PM | 12:00 PM | 1:00 PM |
| 10:00 PM | 11:30 AM | 12:30 PM |
| 8:00 PM | 9:30 AM | 10:30 AM |
Does the difference change during the year?
As written, no: IST is always UTC+5:30 and EST is always UTC−5, so the gap is 10 hours 30 minutes on every date. But New York uses EST only in winter, and people often keep writing “EST” when they mean the local time. Between the local clocks of India and New York, the gap is 10 hours 30 minutes or 9 hours 30 minutes:
| From | What changes | India | New York | EST vs IST |
|---|---|---|---|---|
| January 1 | Start of the year | IST (UTC+5:30) | EST (UTC−5) | −10 h 30 min |
| March 8 | New York moves to EDT (UTC−4) | IST (UTC+5:30) | EDT (UTC−4) | −9 h 30 min |
| November 1 | New York moves to EST (UTC−5) | IST (UTC+5:30) | EST (UTC−5) | −10 h 30 min |
| From | What changes | India | New York | EST vs IST |
|---|---|---|---|---|
| January 1 | Start of the year | IST (UTC+5:30) | EST (UTC−5) | −10 h 30 min |
| March 14 | New York moves to EDT (UTC−4) | IST (UTC+5:30) | EDT (UTC−4) | −9 h 30 min |
| November 7 | New York moves to EST (UTC−5) | IST (UTC+5:30) | EST (UTC−5) | −10 h 30 min |
Converting IST to EST by hand
With the fixed offsets, take away 10 hours 30 minutes: 3:30 PM IST is 5:00 AM EST. In your head it is easier to swap AM and PM, then add 1 hour 30 minutes: 3:30 PM, 3:30 AM, 5:00 AM.
With the −9 h 30 min gap (Mar 14 – Nov 7), take away 9 hours 30 minutes: 3:30 PM IST is 6:00 AM EST. In your head it is easier to swap AM and PM, then add 2 hours 30 minutes: 3:30 PM, 3:30 AM, 6:00 AM.
Going back from EST to IST, do the opposite: the EST to IST page has its own table.
Where the IST and EST working days overlap
IST to EST (−10 h 30 min): Two 9:00–17:00 days do not overlap at all. To meet between 7:00 AM and 9:00 PM on both sides, start at 7:00 AM IST (8:30 PM EST), or 6:00 PM to 9:00 PM IST (7:30 AM to 10:30 AM EST).
−9 h 30 min (between Mar 14 and Nov 7, 2027): Two 9:00–17:00 days do not overlap at all. To meet between 7:00 AM and 9:00 PM on both sides, start at 5:00 PM to 9:00 PM IST (7:30 AM to 11:30 AM EST).
A meeting fixed in one city’s calendar moves by an hour for the other when the gap changes. Calendar apps handle this when the event is saved in a named zone (for example Asia/Kolkata) rather than as a fixed offset.
What IST and EST mean
India Standard Time
IST here is India Standard Time, UTC+5:30, used in all of India all year: no daylight saving time and a single zone for the whole country.
IST can also mean Israel Standard Time (UTC+2, Israel) or Irish Standard Time (UTC+1, Ireland, in summer). This page uses India Standard Time, the meaning people searching for this conversion have in mind. For another one, type the city into the time zone converter.
Eastern Standard Time
EST is UTC−5. The US East Coast and eastern Canada (New York, Washington, Miami, Toronto, Montreal) use it only in winter; from the second Sunday of March to the first Sunday of November they are on EDT, UTC−4. Jamaica, Panama and Cancún keep it all year, and since 2026 so does Manitoba (Winnipeg).