IST to EST Converter
Convert India Time to Eastern Time for any date. Eastern is ten and a half hours behind India in winter — and nine and a half in summer, because India never changes its clocks while the US does. The half hour is real, and this converter never rounds it away.
Convert India Time to Eastern Time
It opens on the current India Time time — pick any date and time to convert it.
Your converted time will appear here.
The IST to EST difference, exactly
The gap, the day change and the offsets — shown with every result.
10 h 30 behind in winter
7:30 PM in Delhi is 9:00 AM in New York while the US is on standard time.
9 h 30 in US summer
The same 7:30 PM is 10:00 AM in New York once Eastern moves to EDT.
Mostly opposite days
India’s working day is America’s night — the overlap is a few hours at best.
About IST to EST conversion
India Time and Eastern Time are close to opposite sides of the clock. India keeps a single time for the whole country — IST, UTC+5:30, with no daylight saving — while US Eastern swings between EST (UTC-5) and EDT (UTC-4). The gap between them is therefore 10 hours 30 minutes in the US winter and 9 hours 30 minutes in the US summer, and every conversion carries the half hour that whole-hour charts quietly drop. When it is 7:30 PM in Delhi, Mumbai and Bangalore, it is 9:00 AM the same day in New York in winter, and 10:00 AM in summer. This converter uses the real times in India and New York, so the date you pick decides which gap applies.
This is the defining time pair of the global software industry, run in the direction Indian teams live it: the evening handover in Bangalore is the morning stand-up in New York. The workable overlap runs from about 6:00 PM to 11:00 PM in India (8:00 AM–12:30 PM Eastern in winter) — outside it, someone is up very early or very late. The day line cuts through the middle of the pair: an Indian morning is still the previous evening in the East, so a “Wednesday 9:00 AM” start in Delhi is 10:30 PM Tuesday in New York in winter. The converter states the resulting day on every conversion.
On a January date (in US summer, EST is one hour later):
| IST | EST |
|---|---|
| 12:00 AM | 1:30 PM (previous day) |
| 9:00 AM | 10:30 PM (previous day) |
| 12:00 PM | 1:30 AM |
| 6:00 PM | 7:30 AM |
| 7:30 PM | 9:00 AM |
Frequently asked questions
The difference, daylight saving and the cases people trip over.
What is the time difference between IST and EST?
Eastern Time is 10 hours 30 minutes behind India in winter (IST is UTC+5:30, EST is UTC-5) and 9 hours 30 minutes behind in summer, when Eastern is on EDT (UTC-4). India does not observe daylight saving, so only the US side moves.
How do I convert IST to EST?
Subtract 10 hours 30 minutes in winter — 7:30 PM IST is 9:00 AM EST — or 9 hours 30 minutes in US summer (7:30 PM IST is 10:00 AM EDT). Indian times before 10:30 AM fall on the previous day in the East in winter. This converter picks the right figure from the date and keeps the half hour exact.
Why does India have a half-hour time zone?
IST is set to UTC+5:30, a compromise meridian for a country that spans about two hours of solar time but keeps one clock. Several countries use half-hour offsets — Iran and parts of Australia among them — and any converter that assumes whole hours will be wrong for all of them.
What is the best time for an India–US call?
The overlap that hurts least is evening in India and morning in the East: 6:30–9:30 PM in India is 9:00 AM–12:00 PM Eastern in winter (8:00–11:00 AM in US summer). Later Indian starts push the East Coast past lunch; earlier ones start before dawn in India.
Does India observe daylight saving?
No. India has kept IST (UTC+5:30) year-round for decades, which is why the IST to EST gap changes when the US changes its clocks, not when India does.
Is anything I enter stored?
No. The conversion runs entirely in your browser; nothing is uploaded or saved.