toolready. IST to EST Converter

IST to EST Converter

India Standard Time to US Eastern.

EST — Eastern Time (EST/EDT)

What this does

Enter an India Standard Time reading and get the US Eastern equivalent. The source zone is Asia/Kolkata, a flat UTC+5:30 with no daylight saving anywhere in it, and the target is America/New_York, which switches twice a year. That mismatch is why the gap between the two is not a fixed number, and why the tool wants a date as well as a time. Everything is computed in the page itself, so it works offline and none of your scheduling goes to a server.

Is IST 9.5 or 10.5 hours ahead of Eastern?

Both, depending on the month. In the US winter, Eastern is EST at UTC−5 and India is 10 hours 30 minutes ahead. In the US summer, Eastern springs forward to EDT at UTC−4 and the distance shrinks to 9 hours 30 minutes. India never moves, so the change is entirely on the American side: forward on the second Sunday in March, back on the first Sunday in November. The half hour is not a rounding error — IST is one of the world's UTC+5:30 zones, so cross-pair times land on the half hour rather than the hour.

What is 9pm IST in EST?

11:00 AM the same morning in New York during the US winter, or 12:00 noon during the US summer. A full India workday, rolled forward:

ISTEastern, US winterEastern, US summer
9:00 AM10:30 PM (prev day)11:30 PM (prev day)
11:00 AM12:30 AM1:30 AM
1:00 PM2:30 AM3:30 AM
3:30 PM5:00 AM6:00 AM
6:00 PM7:30 AM8:30 AM
6:30 PM8:00 AM9:00 AM
8:00 PM9:30 AM10:30 AM
9:30 PM11:00 AM12:00 PM (noon)

How do I convert an IST time here?

The result updates as you type, so there is nothing to submit:

  1. Set the date first — anything between mid-March and early November uses the 9.5 hour gap, the rest of the year uses 10.5.
  2. Type the India clock reading on the left, or press Use now to fill in the current time in India.
  3. Read the Eastern result on the right. Watch the date in the output: morning times in India are the previous evening in New York.

Does India have daylight saving?

No. India runs a single zone at UTC+5:30 year-round, for the whole country from Gujarat to Assam — there is no summer time and no regional variation to account for. So an Indian team's clock is stable, and any drift in a recurring call with the US comes from the American end changing twice a year.

When can an India and a US East Coast team actually meet?

The overlap is real but late for India. A slot at 6:30–8:30 PM IST is 8:00–10:00 AM Eastern in winter and 9:00–11:00 AM in summer — the usual landing spot for offshore standups and client calls. Going earlier, a 6:00 PM IST call is a 7:30 AM start in New York; going later, 9:30 PM IST buys you a full 11:00 AM Eastern slot at the cost of an Indian evening. For the server-time side of the same problem see UTC to IST and UTC to EST, or line the zones up together in the timezone converter.