Eastern Standard Time (est) is used in USA. The IANA timezone identifier is America/New_York.

India Standard Time (ist) is used in India. The IANA timezone identifier is Asia/Kolkata.

EST to IST Time Converter

Eastern Standard Time → India Standard Time

EST = UTC-4IST = UTC+5:30

⚠️ IST is ambiguous — on this page it means India Standard Time. It also refers to:

EST → Ireland Standard Time (Dublin) ↗EST → Israel Standard Time (Jerusalem) ↗

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

IST (Mumbai)

India · +9.5h

18:30

London

United Kingdom · +5h

14:00

Tokyo

Japan · +13h

22:00

Dubai

United Arab Emirates · +8h

17:00

Sydney

Australia · +14h

23:00

EST (New York) to IST (Mumbai) — exact time difference

EST (New York) is 10 hours 30 minutes behind IST (Mumbai). When EST (New York) clocks hit noon, IST (Mumbai) reads 21:00.

EST (New York) observes America/New_York and IST (Mumbai) observes Asia/Kolkata — a 9.5 hours 30 minutes gap between them.

Working hours overlap

When EST (New York) is in standard working hours, IST (Mumbai) is not — and vice versa. There is no mutual business window between these two locations.

Optimal meeting slots

No business hours overlap exists between EST (New York) and IST (Mumbai). Showing the most balanced options with minimal inconvenience for both locations.

07:00 New York / 16:00 Mumbai⚡ One side off-hours

⚠️ 2h before working hours in New York

09:00 New York / 18:00 Mumbai⚡ One side off-hours

⚠️ 2h after working hours in Mumbai

06:00 New York / 15:00 Mumbai⚡ One side off-hours

⚠️ 3h before working hours in New York

Assumes a standard 9 AM–5 PM workday in each location's local timezone.

Holiday calendar for both locations

EST (New York)7 holidays

Jul 3Independence DaySOON

Sep 7Labour Day

Oct 12Columbus Day

Oct 12Indigenous Peoples' Day

Nov 11Veterans Day

IST (Mumbai)

No upcoming public holidays this year.

Working across EST (New York) and IST (Mumbai)

Working across EST (New York) (USA) and IST (Mumbai) (India) is a challenge — the 9.5-hour difference means no shared business hours window under a standard schedule. Flexibility from at least one side is required.

💡 Best practice for cross-timezone meetings

⚡

07:00–08:00 in EST (New York) corresponds to 16:00–17:00 in IST (Mumbai) (2h before working hours in New York).

⚡

09:00–10:00 in EST (New York) corresponds to 18:00–19:00 in IST (Mumbai) (2h after working hours in Mumbai).

⚡

06:00–07:00 in EST (New York) corresponds to 15:00–16:00 in IST (Mumbai) (3h before working hours in New York).

Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.

Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.

Install ClockinSync Free →

Drag the slider at the top to convert any EST (New York) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.

EST (New York) ↔ IST (Mumbai)

No overlap — one side will join outside working hours

EST (New York)

IST (Mumbai)

00:00

09:30Working

01:00

10:30Working

02:00

11:30Working

03:00

12:30Working

04:00

13:30Working

05:00

14:30Working

06:00

15:30Working

07:00

16:30Working

08:00

17:30

09:00Working

18:30off

10:00Working

19:30off

11:00Working

20:30off

12:00Working

21:30off

13:00Working

22:30off

14:00Working

23:30off

15:00Working

00:30+1doff

16:00Working

01:30+1doff

17:00

02:30+1d

18:00

03:30+1d

19:00

04:30+1d

20:00

05:30+1d

21:00

06:30+1d

22:00

07:30+1d

23:00

08:30+1d

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between est and ist?

Eastern Standard Time (est) is UTC-4 and India Standard Time (ist) is UTC+5:30. The difference between them is 9.5 hours.

Where is est used?

Eastern Standard Time (est) is used in USA and surrounding regions. The IANA timezone identifier is America/New_York.

Where is ist used?

India Standard Time (ist) is used in India and surrounding regions. The IANA timezone identifier is Asia/Kolkata. Note: ist is ambiguous and may refer to other timezones.

How do I convert est to ist?

Use the interactive converter above. Drag the time slider to any est time and the ist equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular EST conversions

EST → London EST → Tokyo EST → Dubai EST → Sydney EST → Paris EST → Berlin EST → Singapore EST → Los Angeles EST → Toronto EST → Mumbai

Popular IST conversions

London → IST New York → IST Tokyo → IST Dubai → IST Sydney → IST Paris → IST Berlin → IST Singapore → IST Los Angeles → IST Toronto → IST