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IST to EST Converter - Convert Indian Time to Eastern Time

Select your time and date, then see the conversion instantly
Example: When it's 8:00 PM in IST, it's:
9:30 AMEST (UTC-5)
EST is 10 hours 30 minutes behind IST during standard time.
Same-day example conversion

Quick Reference: EST is 10 hours 30 minutes behind IST (EDT during daylight saving). India does not observe daylight saving time.

Common IST to EST Conversions:
00:00 IST = 13:30 EST (prev day) | 06:00 IST = 19:30 EST (prev day) | 09:00 IST = 22:30 EST (prev day) | 12:00 IST = 01:30 EST | 15:00 IST = 04:30 EST | 18:00 IST = 07:30 EST

Related conversions: EST to IST, UTC to EST, PST to EST, CST to EST, GMT to EST, JST to EST

Quick Time Zone Conversions

IST PST IST GMT IST UTC IST CST IST MST GMT EST PST GMT PST EST EST IST CST IST

Complete Timezone Conversion Tables

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Every popular timezone pair - EST, PST, GMT, IST, JST and more

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Time Offset
-10h 30m
-9h 30m when EST ? EDT (Mar-Nov)
Date Line Crossover
Before 10:30 AM IST
EST shows the previous calendar day
Daylight Saving
IST: no DST - always UTC+5:30
EST: Mar-Nov
Best Meeting Window
6-8 PM IST
= 7:30 AM-9:30 AM EST

Complete IST → EST Conversion Table

All 24 hours · Both DST seasons · Best meeting windows marked ★

Best overlap Next day in EST
IST Time EST Standard Season  UTC+5:30
Standard  -  UTC+5:30 → UTC-5  (-10h 30m)		 EDT Daylight Season  EDT
Daylight  -  UTC+5:30 → EDT  (-9h 30m)
12:00 AM (midnight)prev 1:30 PMprev 2:30 PM
1:00 AMprev 2:30 PMprev 3:30 PM
2:00 AMprev 3:30 PMprev 4:30 PM
3:00 AMprev 4:30 PMprev 5:30 PM
4:00 AMprev 5:30 PMprev 6:30 PM
5:00 AMprev 6:30 PMprev 7:30 PM
6:00 AMprev 7:30 PMprev 8:30 PM
7:00 AMprev 8:30 PMprev 9:30 PM
8:00 AMprev 9:30 PMprev 10:30 PM
9:00 AMprev 10:30 PMprev 11:30 PM
10:00 AMprev 11:30 PM12:30 AM
11:00 AM12:30 AM1:30 AM
12:00 PM (noon)1:30 AM2:30 AM
1:00 PM2:30 AM3:30 AM
2:00 PM3:30 AM4:30 AM
3:00 PM4:30 AM5:30 AM
4:00 PM5:30 AM6:30 AM
5:00 PM6:30 AM7:30 AM
6:00 PM7:30 AM8:30 AM
7:00 PM8:30 AM9:30 AM
8:00 PM9:30 AM10:30 AM
9:00 PM10:30 AM11:30 AM
10:00 PM11:30 AM12:30 PM
11:00 PM12:30 PM1:30 PM
★ Best overlap: 6-8 PM IST / = 7:30 AM-9:30 AM EST

What is the time difference between IST and EST?

EST is 10 hours 30 minutes behind IST. During March to November, when EST switches to EDT, the difference becomes 9 hours 30 minutes behind. 9:00 AM IST = 10:30 PM (previous day) EST. 12:00 PM IST = 1:30 AM EST. 5:00 PM IST = 6:30 AM EST.

What is the best time to call from Mumbai to New York?

There is no 9-to-5 business hours overlap between IST and EST. The typical compromise is early morning IST: 8:00 AM IST (9:30 PM (previous day) EST), or late evening IST: 6:00 PM IST (7:30 AM EST). One side will be outside normal hours, so teams usually rotate who takes the off-hours call.

IST to EST Conversion - Frequently Asked Questions

IST (India Standard Time) is 10.5 hours ahead of EST during winter, and 9.5 hours ahead during EDT (summer).

Key conversion examples:

  • 00:00 IST = 13:30 EST (previous day)
  • 09:00 IST = 22:30 EST (previous day)
  • 12:00 IST = 01:30 EST
  • 19:00 IST = 08:30 EST

India maintains UTC+5:30 year-round (no DST), while US Eastern switches between EST (UTC-5, November-March) and EDT (UTC-4, March-November).

To convert IST to EST:

  1. Winter (EST): Subtract 10.5 hours from IST (November-March)
  2. Summer (EDT): Subtract 9.5 hours from IST (March-November)

Example conversions:

  • 09:00 IST = 22:30 EST (previous day)
  • 18:00 IST = 07:30 EST
  • 23:00 IST = 12:30 EST

Use our converter above for automatic DST adjustments and accurate conversions. The tool automatically detects whether EST or EDT is in effect.

Optimal meeting window: 19:00-23:00 IST = 08:30-12:30 EST (or 09:30-13:30 EDT)

This window works best because:

  • For India: Late afternoon/evening hours (post-work flexibility)
  • For US East Coast: Morning business hours (fresh start of day)
  • Example: 20:00 IST = 09:30 EST works perfectly for Mumbai-New York teams

Alternative windows: Early morning IST (06:00-09:00) overlaps with late evening EST (19:30-22:30), suitable for urgent matters.

No, India does not observe Daylight Saving Time (DST). IST remains constant at UTC+5:30 throughout the year.

However, US Eastern Time does observe DST:

  • EST (Winter): UTC-5 (early November to mid-March)
  • EDT (Summer): UTC-4 (mid-March to early November)

This means the time difference between IST and US Eastern changes: 10.5 hours during EST season, 9.5 hours during EDT season. Our converter automatically handles these transitions.

Major cities in IST (UTC+5:30):

  • Mumbai - 20.7 million (Financial capital)
  • Delhi - 32.9 million (National capital)
  • Bangalore - 12.3 million (Tech hub)
  • Kolkata - 14.9 million (Cultural capital)
  • Chennai - 10.9 million (Industrial center)
  • Hyderabad - 10.0 million (IT services)
  • Pune - 6.6 million (Manufacturing & education)

All of India uses a single time zone (IST) and does not observe Daylight Saving Time, making it one of the few large countries with uniform time across all regions.

Major cities in EST/EDT (UTC-5/-4):

  • New York, NY - 8.3 million (Financial capital)
  • Philadelphia, PA - 1.6 million (Historic city)
  • Washington, DC - 712K (US capital)
  • Boston, MA - 675K (Education & tech)
  • Atlanta, GA - 499K (Transportation hub)
  • Miami, FL - 449K (International gateway)
  • Toronto, Canada - 2.9 million (Canadian financial center)

These cities switch between EST (winter, UTC-5, November-March) and EDT (summer, UTC-4, March-November). Always verify current DST status when scheduling.

Best practices for India-US East Coast scheduling:

  1. Optimal window: 19:00-23:00 IST (08:30-12:30 EST or 09:30-13:30 EDT)
  2. Always specify both local times in meeting invites (e.g., "20:00 IST / 09:30 EST")
  3. Account for DST transitions: US changes in March/November, India never changes
  4. Use correct abbreviations: 'EST' for November-March, 'EDT' for March-November
  5. Consider work-life balance: Avoid scheduling India team calls after 23:00 IST or US team before 08:00 EST

Popular meeting times: 20:00 IST = 09:30 EST (team standups), 21:00 IST = 10:30 EST (project reviews), 19:00 IST = 08:30 EST (urgent issues).

Need more help? Check our complete FAQ section.

View Complete FAQ

Popular Cities in These Timezones

IST Timezone Cities:

Mumbai, Delhi, Bangalore, Kolkata

EST Timezone Cities:

New York, Boston, Miami, Atlanta

Related Reading

Scheduling calls between India and the US? Read our complete guide: Best Time to Call India from the US — overlap windows, call time tables and common mistakes to avoid.