Time Conversion Calculator
IST to EDT Converter
Convert India Standard Time to EDT with date-aware logic, a 24-hour table, meeting planner, and copy-ready result.
Convert IST to EDT
Choose a date and time in India Standard Time. The calculator will show the matching EDT time.
Suggested meeting times
24-hour IST to EDT conversion table
Full-day conversion for the selected date.
| India Standard Time | EDT | Meeting note |
|---|---|---|
| Select a time and convert to generate the table. | ||
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IST to EDT: quick answer
To convert India Standard Time (IST) to Eastern Daylight Time (EDT), subtract 9 hours and 30 minutes. For example, 7:30 PM IST is 10:00 AM EDT. IST is fixed at UTC+05:30 and EDT is fixed at UTC-04:00 for this calculation.
This page converts specifically to EDT. If the destination is New York during its standard-time season, use EST instead; EST is one hour behind EDT and sits 10 hours 30 minutes behind IST.
How to convert IST to EDT
- Start with the IST date and time.
- Subtract 9 hours and 30 minutes.
- If the result moves before midnight, use the previous EDT date.
- Retain the EDT label so it is not mistaken for EST.
Example: 6:00 AM IST – 9 hours 30 minutes = 8:30 PM EDT on the previous calendar date.
Why EDT and EST produce different answers
| Target label | UTC offset | Amount subtracted from IST |
|---|---|---|
| EDT | UTC-04:00 | 9 hours 30 minutes |
| EST | UTC-05:00 | 10 hours 30 minutes |
| Eastern Time | EDT or EST by date | Use a date-aware city or regional converter |
EDT identifies the daylight-time offset, while EST identifies the standard-time offset. A dated event in an Eastern Time location may use either one depending on local rules and the event date.
Common IST to EDT conversions
| IST | EDT | Date note |
|---|---|---|
| 6:00 AM | 8:30 PM | Previous day |
| 9:00 AM | 11:30 PM | Previous day |
| 12:00 PM | 2:30 AM | Same day |
| 3:00 PM | 5:30 AM | Same day |
| 7:30 PM | 10:00 AM | Same day |
| 9:00 PM | 11:30 AM | Same day |
Previous-date and same-date rules
IST times earlier than 9:30 AM convert to the previous EDT calendar date. At exactly 9:30 AM IST, the result is 12:00 AM EDT on the same date. Include the date in invitations whenever India morning times are involved.
Best India to EDT meeting window
A practical India-side window is 5:30 PM-8:30 PM IST, corresponding to 8:00 AM-11:00 AM EDT. Teams with recurring meetings should confirm when the destination changes between EDT and EST.
Formula, methodology and verification
The calculation applies IST at UTC+05:30 and EDT at UTC-04:00, then subtracts the 570-minute difference. Verification covers half-hour arithmetic, previous-day rollover, month and year boundaries, 12-hour and 24-hour formatting, and reciprocal IST to EDT to IST test cases.
Frequently asked questions
How far behind IST is EDT?
EDT is exactly 9 hours and 30 minutes behind IST.
What is 7:30 PM IST in EDT?
7:30 PM IST is 10:00 AM EDT on the same calendar date.
What is 6:00 AM IST in EDT?
6:00 AM IST is 8:30 PM EDT on the previous calendar date.
Should I use EDT or EST for New York?
Use the abbreviation that applies on the event date. New York generally uses EDT during daylight time and EST during standard time.
Does IST change during the year?
No. Modern India Standard Time remains at UTC+05:30 throughout the year.
Related converters and official references
Need the reverse direction? Use the EDT to IST Converter. For winter Eastern Standard Time, use the IST to EST Converter. You can also compare the IST to CST Converter.
References: IANA Time Zone Database, NIST local time FAQs, and CSIR-National Physical Laboratory India.