Quick Answer
India Standard Time (IST) is 10 hours and 30 minutes ahead of US Eastern Standard Time (EST), because IST is UTC+5:30 and EST is UTC−5. So 9:00 AM EST is 7:30 PM IST the same day. When the US is on daylight saving (EDT, from mid-March to early November), the gap is 9 hours 30 minutes instead. This EST to IST converter adds the offset, rolls the date over when needed and works both ways.
How to Convert EST to IST
Every time zone is an offset from UTC. India Standard Time is UTC+5:30 and never changes, while US Eastern time is UTC−5 in winter (EST) and UTC−4 in summer (EDT). Subtract one offset from the other and you get the gap: IST is 10 hours 30 minutes ahead of EST, or 9 hours 30 minutes ahead of EDT.
IST = EDT + 9:30 during US daylight saving
EST = IST − 10:30 to go the other way — roll the date back a day if it goes below midnight
Because IST is so far ahead, afternoon and evening times in the US fall on the next day in India — 3:00 PM EST is 1:30 AM the following morning in India. The converter tracks that day change for you, which is the part people most often get wrong when booking calls.
How to Use the EST to IST Converter
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Enter the time
Type the hour and minutes and choose AM or PM — for example 9:00 AM.
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Pick the direction
EST → IST to turn a US Eastern time into India time, or IST → EST for the reverse.
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Choose EST or EDT
Use EST in winter and EDT from mid-March to early November, when the US is on daylight saving. EDT makes IST 9.5 hours ahead instead of 10.5.
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Read the result
You get the converted time, whether it lands on the next or previous day, and the 24-hour version.
EST to IST Conversion Table
Common US Eastern Standard Time hours converted to India Standard Time (add 10 hours 30 minutes).
| EST | IST |
|---|---|
| 12:00 AM (midnight) | 10:30 AM |
| 3:00 AM | 1:30 PM |
| 6:00 AM | 4:30 PM |
| 9:00 AM | 7:30 PM |
| 12:00 PM (noon) | 10:30 PM |
| 3:00 PM | 1:30 AM (next day) |
| 6:00 PM | 4:30 AM (next day) |
| 9:00 PM | 7:30 AM (next day) |
