Time Zone Converter

Convert times between different time zones worldwide. Perfect for scheduling international meetings, calls, and events across time zones.

Time Zone Settings

From Time Zone IST (India)
Select the time zone you want to convert from
Date Jan 19, 2026
Select the date for conversion
Time 12:00 PM
Enter the time you want to convert
To Time Zone EST (Eastern)
Select the time zone you want to convert to
Quick Time Zones Common Zones
Quickly select common time zone conversions
Automatically adjust for daylight saving time where applicable
Time Conversion
2:30 AM
-9.5 hours
Original Time 12:00 PM IST
Time Difference -9 hours 30 minutes
Converted Time 2:30 AM EST
GMT+5:30
From Zone Offset
GMT-5
To Zone Offset
9.5 hours
Total Difference

Time Zone Details

From Time Zone
IST (India)
To Time Zone
EST (Eastern)
Original Date & Time
Apr 15, 2025 12:00 PM
Converted Date & Time
Apr 15, 2025 2:30 AM
Daylight Saving (DST)
Not Applicable
Time Zone Difference
9 hours 30 minutes

Working Hours Comparison

Time in IST Time in EST Business Hours Suitable For

Meeting Suggestion

The best overlap for meetings between India and Eastern Time is between 6:30 PM to 8:30 PM IST (9:00 AM to 11:00 AM EST).

Major World Time Zones

North America

EST (Eastern): GMT-5 (New York, Toronto)

CST (Central): GMT-6 (Chicago, Mexico City)

PST (Pacific): GMT-8 (Los Angeles, Vancouver)

DST: Mar-Nov (except Arizona, Hawaii)

Europe & Africa

GMT (London): GMT+0 (London, Lisbon)

CET (Central Europe): GMT+1 (Paris, Berlin)

EET (Eastern Europe): GMT+2 (Athens, Cairo)

DST: Mar-Oct (most countries)

Asia Pacific

IST (India): GMT+5:30 (Mumbai, Delhi)

CST (China): GMT+8 (Beijing, Singapore)

JST (Japan): GMT+9 (Tokyo, Seoul)

DST: Not observed in most countries

Australia & Pacific

AEST (Eastern): GMT+10 (Sydney, Melbourne)

ACST (Central): GMT+9:30 (Adelaide, Darwin)

AWST (Western): GMT+8 (Perth)

DST: Oct-Apr (some regions)

About Time Zone Converter

The Time Zone Converter helps you convert times between different time zones worldwide. This tool is essential for scheduling international meetings, calls, webinars, and managing remote teams across different regions.

How Time Zone Conversion Works

1

Convert to UTC

First, convert the local time to Coordinated Universal Time (UTC) by applying the time zone offset.

UTC = Local Time - Time Zone Offset

2

Apply Destination Offset

Then, convert UTC to the destination time zone by applying its offset.

Destination Time = UTC + Destination Offset

3

Adjust for DST

Adjust for Daylight Saving Time if applicable in either time zone.

DST adds 1 hour during summer months (typically Mar-Nov in Northern Hemisphere)

4

Handle Date Changes

Adjust the date if the conversion crosses midnight.

+1 day for forward time travel, -1 day for backward time travel

Time Zone Abbreviations

North America

  • EST: Eastern Standard Time (GMT-5)
  • EDT: Eastern Daylight Time (GMT-4)
  • CST: Central Standard Time (GMT-6)
  • CDT: Central Daylight Time (GMT-5)
  • PST: Pacific Standard Time (GMT-8)
  • PDT: Pacific Daylight Time (GMT-7)
  • MST: Mountain Standard Time (GMT-7)
  • MDT: Mountain Daylight Time (GMT-6)

Europe & Others

  • GMT: Greenwich Mean Time (GMT+0)
  • BST: British Summer Time (GMT+1)
  • CET: Central European Time (GMT+1)
  • CEST: Central European Summer Time (GMT+2)
  • EET: Eastern European Time (GMT+2)
  • EEST: Eastern European Summer Time (GMT+3)
  • AEST: Australian Eastern Standard Time (GMT+10)
  • AEDT: Australian Eastern Daylight Time (GMT+11)

Asia & Pacific

  • IST: India Standard Time (GMT+5:30)
  • CST: China Standard Time (GMT+8)
  • JST: Japan Standard Time (GMT+9)
  • KST: Korea Standard Time (GMT+9)
  • SGT: Singapore Time (GMT+8)
  • AWST: Australian Western Standard Time (GMT+8)
  • ACST: Australian Central Standard Time (GMT+9:30)
  • NZST: New Zealand Standard Time (GMT+12)

Other Regions

  • BRT: Brasília Time (GMT-3)
  • BRST: Brasília Summer Time (GMT-2)
  • ART: Argentina Time (GMT-3)
  • AST: Arabia Standard Time (GMT+3)
  • SAST: South Africa Standard Time (GMT+2)
  • MSK: Moscow Standard Time (GMT+3)
  • GST: Gulf Standard Time (GMT+4)
  • HST: Hawaii Standard Time (GMT-10)

Daylight Saving Time (DST) Rules

Region DST Start DST End Clock Change Exceptions
USA & Canada 2nd Sunday in March 1st Sunday in November 2:00 AM → 3:00 AM Arizona, Hawaii, Saskatchewan
European Union Last Sunday in March Last Sunday in October 1:00 AM → 2:00 AM Iceland, Russia, Belarus
Australia 1st Sunday in October 1st Sunday in April 2:00 AM → 3:00 AM Queensland, NT, WA
New Zealand Last Sunday in September 1st Sunday in April 2:00 AM → 3:00 AM Chatham Islands
Brazil 1st Sunday in November 3rd Sunday in February 0:00 AM → 1:00 AM Northern regions

Tips for International Scheduling

  • Check DST Status: Always verify if DST is active in both time zones
  • Use 24-hour Format: Avoid AM/PM confusion in international communication
  • Include Date: Always mention the date along with time to avoid day confusion
  • Confirm Time Zone: Specify time zone abbreviation (EST, GMT, IST, etc.)
  • Consider Working Hours: Schedule during overlapping business hours
  • Account for Date Line: Be aware of International Date Line crossings
  • Use Calendar Links: Send calendar invites with correct time zone settings
  • Double-check: Verify the converted time with the other party
Note: Time zone conversions are based on current time zone rules and may be affected by local government decisions to change DST dates or abolish DST altogether. Some regions may have half-hour or 45-minute offsets. Always verify critical times with official sources. This converter provides approximations based on standard time zone rules.

What is the difference between GMT and UTC?

GMT (Greenwich Mean Time) is a time zone, while UTC (Coordinated Universal Time) is a time standard. For most practical purposes, GMT and UTC are the same (GMT+0). However, UTC is more precise as it uses atomic clocks.

How to convert IST to EST?

IST (India Standard Time) is GMT+5:30. EST (Eastern Standard Time) is GMT-5. To convert IST to EST, subtract 10 hours 30 minutes (5:30 + 5 = 10:30). During DST, EST becomes EDT (GMT-4), so subtract 9 hours 30 minutes instead.

What countries do not observe Daylight Saving Time?

Most countries near the equator and many Asian countries do not observe DST. Notable examples: India, China, Japan, Russia, Argentina, and most of Africa. In the US, Arizona and Hawaii do not observe DST.

What is the International Date Line?

The International Date Line is an imaginary line at approximately 180° longitude where the date changes. Crossing westward adds one day; crossing eastward subtracts one day. It mostly follows the 180° meridian but zigzags to avoid land masses.

How to schedule meetings across multiple time zones?

1. Use a time zone converter tool. 2. Find overlapping business hours. 3. Consider rotating meeting times for fairness. 4. Use calendar tools with time zone support. 5. Always confirm the time in each participant's local time zone.

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