IST to EST Converter
Here IST is India Standard Time (Asia/Kolkata, New Delhi) and
EST is Eastern Standard Time (North America) (America/New_York, New York). This page also
serves the reverse direction, EST to IST — same gap, opposite sign. Every offset, gap
and date below is computed from the IANA time zone database for the exact date, not typed in, and
is stated as of September 2026.
Convert IST to EST
Pre-set to New Delhi → New York. Swap the two menus to convert EST to IST; the result shows both offsets for the date you pick.
Which IST and which EST?
Zone abbreviations are ambiguous, so this page starts by pinning both down.
IST here is India Standard Time: the IANA zone Asia/Kolkata,
anchored on New Delhi. Note that IST is also Irish Standard Time and Israel Standard Time; this page means only the New Delhi sense. EST here is Eastern Standard Time (North America): America/New_York, anchored on
New York. Note that EST is also Australian Eastern Standard Time (usually written AEST); this page means only the New York sense.
New Delhi keeps UTC+5:30 all year — its January and July offsets are both UTC+5:30 — so IST has no summer-time sibling and never needs disambiguating by season.
EST in the everyday sense means New York time, whichever of EST or EDT (Eastern Daylight Time) is in force. New York is not on EST all year: its offset is UTC−5 while standard time applies (its January offset) and UTC−4 while daylight saving is active (its July offset). As of September 2026 it is on EDT (UTC−4). Wherever this page writes EST, read it as "New York time on the date in question".
New Delhi's offset is not a whole number of hours, which is why every gap on this page carries minutes as well as hours: the difference between UTC+5:30 and UTC−4 cannot be a round number.
The difference as of September 2026
As of September 2026, New York is 9:30 hours behind New Delhi. New Delhi is on UTC+5:30 (no seasonal change) and New York is on UTC−4 (EDT, daylight saving in effect). Subtract one offset from the other and you have the gap. As wall clocks: 9:00 AM in New Delhi is 11:30 PM the previous day in New York, 5:00 PM in New Delhi is 7:30 AM in New York, and 9:00 AM in New York is 6:30 PM in New Delhi.
The calendar date is part of the conversion on this pair. A 9:00 AM to 5:00 PM day in New Delhi reads 11:30 PM the previous day to 7:30 AM in New York, and a 9:00 AM to 5:00 PM day in New York reads 6:30 PM to 2:30 AM the next day in New Delhi, so a time on one side can belong to a different date on the other. The converter above flags each reading that lands on the previous or next day; the date you enter is the date on the From side's clock.
Next scheduled clock changes: no clock change is scheduled for New Delhi within the next 450 days; clocks in New York go back 1 hour on Sunday, November 1, 2026 (local date), moving the offset from UTC−4 to UTC−5. Only New York's changes matter to this pair, and each one moves the gap.
How the gap changes through the year
Only one side of this pair changes its clocks. New Delhi keeps UTC+5:30 all year — its January and July offsets are identical — while New York moves between UTC−5 (its January offset, EST) and UTC−4 (its July offset, EDT). Every time New York shifts, the whole difference shifts with it, because the other offset is standing still. So the gap takes two values a year: New York is 10:30 hours behind New Delhi while New York is on EST, and 9:30 hours behind New Delhi while it is on EDT.
Over the year scanned from Sep 7, 2026, the engine finds two such moves, each at the exact minute New York's clocks change:
- Sunday, November 1, 2026 (New York date): the gap goes from 9:30 hours behind to 10:30 hours behind.
- Sunday, March 14, 2027 (New York date): the gap goes from 10:30 hours behind to 9:30 hours behind.
The practical consequence is the one that catches recurring meetings. A call fixed at 9:00 AM on New Delhi's clock is 10:30 PM the previous day in New York while New York is on EST, and 11:30 PM the previous day while it is on EDT. Nobody in New Delhi sees the meeting move, but on New York's calendar it jumps by 1 hour on each of the dates above. The reverse is just as true: a 9:00 AM slot fixed on New York's clock lands at 7:30 PM or 6:30 PM in New Delhi depending on the season. Whichever side owns the invitation, the other side sees it move twice a year — which is exactly what the converter above accounts for when you give it a date.
Working hours that overlap
Assume a 9:00 AM to 5:00 PM day on both sides. Because the gap changes during the year, the overlap changes with it, so it is shown for each gap the pair takes:
- New York 10:30 hours behind New Delhi (IST / EST; 133 of the 365 days scanned): no overlap at all: when it is 9:00 AM in New York it is already 7:30 PM in New Delhi.
- New York 9:30 hours behind New Delhi (IST / EDT; 232 of the 365 days scanned): no overlap at all: when it is 9:00 AM in New York it is already 6:30 PM in New Delhi.
The 9-to-5 window is a convention, not a fact about anyone's real hours. The Meeting Planner lets you set each side's actual working hours and shows the overlap for the exact date you are planning.
Converting EST to IST
This page serves both directions, because the reverse conversion is the same gap with the sign flipped. As of September 2026, New Delhi is 9:30 hours ahead of New York, so:
- 9:00 AM IST (New Delhi) = 11:30 PM the previous day EST (New York)
- 9:00 AM EST (New York) = 6:30 PM IST (New Delhi)
- 5:00 PM EST (New York) = 2:30 AM the next day IST (New Delhi)
To run EST to IST in the converter above, swap the From and To menus; the result shows both offsets for the date you enter and flags a day change whenever the reading lands on the previous or next calendar day. The readings above hold only while the gap is 9:30 hours behind; on the dates listed in the section above they move, in both directions at once.
More on these zones
- Current time in New Delhi — live clock, offset and next clock change.
- Current time in New York — live clock, offset and next clock change.
- Time Zone Converter — any city to any city, DST-correct for the date.
- Meeting Planner — overlap for your real working hours.
- All zone-to-zone converters — the other corridors on this site.
IST to EST — frequently asked questions
What is the time difference between IST and EST right now?
As of September 2026, New York (EST) is 9:30 hours behind New Delhi (IST): New Delhi is on UTC+5:30 and New York is on UTC−4. So 9:00 AM in New Delhi is 11:30 PM the previous day in New York, and 9:00 AM in New York is 6:30 PM in New Delhi.
Does the IST to EST difference change during the year?
Yes, twice in the year scanned from Sep 7, 2026, because only New York changes its clocks. On New York's calendar the gap moves on Nov 1, 2026 (from 9:30 hours behind to 10:30 hours behind) and Mar 14, 2027 (from 10:30 hours behind to 9:30 hours behind). As of September 2026 it is 9:30 hours behind.
Which IST and which EST does this page mean?
IST means India Standard Time, the IANA zone Asia/Kolkata, anchored on New Delhi. Note that IST is also Irish Standard Time and Israel Standard Time; this page means only the New Delhi sense. EST means Eastern Standard Time (North America), the IANA zone America/New_York, anchored on New York. Note that EST is also Australian Eastern Standard Time (usually written AEST); this page means only the New York sense. In everyday use EST means New York time whichever of EST or EDT is in force; as of September 2026 that is EDT (UTC−4).
When do working hours in New Delhi and New York overlap?
It depends on the season, because the gap moves. Assuming 9:00 AM to 5:00 PM on both sides: while New York is 10:30 hours behind New Delhi (IST / EST), no overlap at all: when it is 9:00 AM in New York it is already 7:30 PM in New Delhi; while New York is 9:30 hours behind New Delhi (IST / EDT), no overlap at all: when it is 9:00 AM in New York it is already 6:30 PM in New Delhi. The 9-to-5 window is a convention, not anyone's actual hours — set your real hours in the Meeting Planner.
How do I convert EST to IST?
Apply the same gap with the sign flipped. As of September 2026, New Delhi is 9:30 hours ahead of New York, so 9:00 AM in New York is 6:30 PM in New Delhi and 5:00 PM in New York is 2:30 AM the next day in New Delhi. The converter on this page handles both directions: swap the From and To menus. Because the gap moves during the year, convert for the specific date rather than reusing a remembered number.
What are IST and EST as UTC offsets?
As of September 2026, IST (Asia/Kolkata) is UTC+5:30 and EST (America/New_York) is UTC−4. New Delhi keeps UTC+5:30 in January and July alike. New York is on UTC−5 in January and UTC−4 in July. The difference between the two offsets is the gap: 9:30 hours behind.
Conversions are computed locally in your browser from its IANA time zone data; nothing you enter is transmitted. The schedule and offsets on this page were derived from the same database at build time, as of September 2026. Jurisdictions occasionally change DST law with short notice, and the IANA database follows reality — for legally critical timing, confirm against an official source. See the methodology page.