IST to EST Converter
EST is 10 hours 30 minutes behind IST. During US daylight saving (EDT), the gap narrows to 9 hours 30 minutes.
Daylight saving note: During US EDT (March–November), the gap narrows to 9h 30m behind IST. India never observes DST.
IST to EST/EDT Conversion Table
Full 24-hour reference table. Use the live clocks above for the exact current offset.
| 🇮🇳 IST | 🇺🇸 IST → ESTUTC+5:30 to UTC-5 | 🇺🇸 IST → EDTUTC+5:30 to UTC-4 | Note |
|---|---|---|---|
| 00:00 | 1:30 PM | 2:30 PM | prev day |
| 01:00 | 2:30 PM | 3:30 PM | prev day |
| 02:00 | 3:30 PM | 4:30 PM | prev day |
| 03:00 | 4:30 PM | 5:30 PM | prev day |
| 04:00 | 5:30 PM | 6:30 PM | prev day |
| 05:00 | 6:30 PM | 7:30 PM | prev day |
| 06:00 | 7:30 PM | 8:30 PM | prev day |
| 07:00 | 8:30 PM | 9:30 PM | prev day |
| 08:00 | 9:30 PM | 10:30 PM | prev day |
| 09:00 | 10:30 PM | 11:30 PM | prev day |
| 10:00 | 11:30 PM | 12:30 AM | prev day |
| 11:00 | 12:30 AM | 1:30 AM | |
| 12:00 | 1:30 AM | 2:30 AM | |
| 13:00 | 2:30 AM | 3:30 AM | |
| 14:00 | 3:30 AM | 4:30 AM | |
| 15:00 | 4:30 AM | 5:30 AM | |
| 16:00 | 5:30 AM | 6:30 AM | |
| 17:00 | 6:30 AM | 7:30 AM | |
| 18:00 | 7:30 AM | 8:30 AM | |
| 19:00 | 8:30 AM | 9:30 AM | |
| 20:00 | 9:30 AM | 10:30 AM | |
| 21:00 | 10:30 AM | 11:30 AM | |
| 22:00 | 11:30 AM | 12:30 PM | |
| 23:00 | 12:30 PM | 1:30 PM |
"prev day" = converted time falls on the previous calendar day.
Best Hours to Schedule India Standard Time–Eastern Standard Time Calls
For Indian professionals scheduling calls with US East Coast colleagues, the practical window is 6:30–8:00 PM IST (8:00–9:30 AM EST). A 7:00 PM IST standup lands at 8:30 AM New York — both sides start their respective day or evening.
About India Standard Time (IST)
India Standard Time (IST, UTC+5:30) covers the entire country without regional variations. At UTC+5:30, IST sits 10 hours 30 minutes ahead of the US East Coast in winter (EST) and 9 hours 30 minutes ahead in summer (EDT).
About Eastern Standard Time (EST/EDT)
Eastern Standard Time (EST, UTC-5) covers the US East Coast. From March to November, the region switches to EDT (UTC-4) instead. For Indian teams, this seasonal US clock shift means their daily US call slot moves by one hour — 6:30 PM IST becomes 9:00 AM EDT instead of 8:00 AM EST.
How to Avoid India Standard Time–Eastern Standard Time Conversion Mistakes
Eastern Standard Time is still on the previous calendar day before these IST times: 10:30 AM for IST → EST, 9:30 AM for IST → EDT. For example, 12:00 AM IST is 1:30 PM in Eastern Standard Time on the previous day (IST → EST).
Abbreviations can be ambiguous here: India Standard Time stays on IST year-round, while Eastern Standard Time switches between EST and EDT. City names and IANA time zones (Asia/Kolkata and America/New_York) are safer for exact scheduling if you're automating anything, since they resolve the right abbreviation automatically instead of needing a manual seasonal check.
Worked Example: An India Evening Hand-Off to a US Morning
Picture an India team finishing its day and handing work to colleagues in New York. An 8:00 PM start in India is 9:30 AM in New York on EST and 10:30 AM on EDT. A 9:30 PM start is 11:00 AM on EST and 12:00 PM on EDT.
The two seasons differ by one hour. India doesn't change its clocks, so every spring the New York morning arrives one hour earlier on India's clock, and every autumn it moves back. If your hand-off has a fixed New York start, it will slide by an hour on the India side twice a year.
Going in the other direction, a 7:00 AM India start is 8:30 PM the previous day in New York on EST and 9:30 PM the previous day on EDT, which is the evening before. Put both dates in the invite for anything before 10:30 AM in India, because the New York date is the day before.
Frequently Asked Questions
What time is 8 PM IST in EST?
8:00 PM IST is 9:30 AM EST during standard time (UTC-5). During US EDT (summer), 8:00 PM IST is 10:30 AM EDT.
What is 9:00 AM EST in IST?
9:00 AM EST is 7:30 PM IST. During US EDT, 9:00 AM EDT is 6:30 PM IST. This is why India-based teams often schedule their US calls in the early evening IST.
When should Indian teams call US Eastern clients?
The best window from India is 6:30–8:00 PM IST, which maps to 8:00–9:30 AM EST. For US Pacific clients, the window is later — 9:30 PM–midnight IST for a 8:00–10:30 AM PST slot.
Does IST change for daylight saving?
No. IST stays at UTC+5:30 year-round. The EST-IST gap changes only when the US shifts clocks in March (to EDT) and November (back to EST).