How do I convert IST to EST by hand?

IST is UTC+5:30 and EST is UTC−5:00, so EST is 10 hours and 30 minutes behind IST. Subtract 10:30 from your IST time and you have EST. Remember to flip the date back one day if the result goes past midnight. The tool does this automatically.

Does this time zone converter handle daylight saving time (DST)?

Yes. The converter uses your browser's built-in IANA time zone database, which knows every country's historical and current DST rules. Just set the date correctly and the right offset is used automatically — you don't have to remember whether clocks are on summer time.

What is the time difference between IST and GMT?

India Standard Time (IST) is always UTC+5:30, and GMT/UTC is UTC+0:00. That makes IST exactly 5 hours and 30 minutes ahead of GMT. Unlike many zones, IST does not observe daylight saving time, so this offset never changes.

Is my data safe — are my times or locations sent to a server?

Nothing is uploaded. All conversions happen directly in your browser using JavaScript and the browser's own time zone data. No date, time, or location information ever leaves your device.

Is this tool free to use?

Yes, completely free. There is no sign-up, no account, and no limit on how many conversions you run.

What does UTC offset mean?

UTC (Coordinated Universal Time) is the global reference clock. An offset like +5:30 means that time zone is 5 hours and 30 minutes ahead of UTC. A negative offset like −5:00 means 5 hours behind. Every world time zone is defined by its offset from UTC.

Why does the converted date sometimes change — I only changed the hour?

Time zones can be many hours apart, so a time in the evening in one zone can fall on the next morning or previous evening in another. For example, midnight IST is 6:30 PM the previous day in London (GMT). Always check both the time and the date in the output.

What is the difference between EST and ET, or PST and PT?

ET (Eastern Time) is the umbrella term for the US East Coast. It is called EST (UTC−5) in winter and EDT (UTC−4) during daylight saving time in summer. The same logic applies to PT/PST/PDT on the West Coast. Using the IANA name (like America/New_York) avoids any confusion because the correct offset is chosen for your date automatically.

Time Zone Converter – IST to EST, GMT, PST & More

City	Local time
New York	Sat, 20 Jun, 2:30 am
Los Angeles	Fri, 19 Jun, 11:30 pm
London	Sat, 20 Jun, 7:30 am
Paris / Berlin	Sat, 20 Jun, 8:30 am
Dubai	Sat, 20 Jun, 10:30 am
Singapore	Sat, 20 Jun, 2:30 pm
Hong Kong	Sat, 20 Jun, 2:30 pm
Tokyo	Sat, 20 Jun, 3:30 pm
Sydney	Sat, 20 Jun, 4:30 pm
Auckland	Sat, 20 Jun, 6:30 pm

Convert any time across world time zones instantly

Pick a time, choose your source and destination time zones, and this time zone converter shows the exact local time on the other side of the world — no mental arithmetic, no off-by-one errors, no guessing about daylight saving. It is especially handy when you need to schedule meetings, join live calls, or coordinate with teammates spread across different countries.

How to use the time zone converter

Enter the date and time you want to convert (today's time is pre-filled).
Select your source time zone — for example, IST (India Standard Time, UTC+5:30).
Choose one or more destination time zones — such as EST, PST, GMT, or any IANA zone.
The converted times appear immediately. Copy or share as needed.

Worked example: IST to EST, PST, and GMT

Say you are in Bangalore and want to join a call at 3:00 PM IST on a Wednesday. Here is what that looks like in three common time zones:

Time Zone	Abbreviation	UTC Offset (standard)	Converted Time
India Standard Time	IST	UTC+5:30	3:00 PM Wed
Greenwich Mean Time	GMT	UTC+0:00	9:30 AM Wed
Eastern Standard Time	EST	UTC−5:00	4:30 AM Wed
Pacific Standard Time	PST	UTC−8:00	1:30 AM Wed

Note: EST and PST shift by one hour during daylight saving time (DST). The tool handles this automatically.

How the conversion is calculated

Every time zone is defined by its offset from UTC (Coordinated Universal Time — the global clock that everything else is measured against). To convert, you go through UTC as a middle step:

Local Time → subtract source UTC offset → UTC → add destination UTC offset → Destination Time

For the example above:

3:00 PM IST − 5:30 = 9:30 AM UTC
9:30 AM UTC − 5:00 = 4:30 AM EST

The tool uses your browser's built-in IANA time zone database — the same database that powers every major operating system and browser. This means daylight saving time (DST) transitions are handled automatically: you don't need to remember whether a country is currently on summer time or not.

IANA zone names look like America/New_York or Asia/Kolkata. They track historical rule changes so even past dates convert correctly. Learn more at the official IANA Time Zone Database.

Common ways people ask the same question

People phrase this need in lots of different ways. Here is a quick map so you know which scenario this tool covers:

"What time is it in New York when it's 5 PM in India?" — classic IST-to-EST conversion; enter the time above and pick America/New_York.
"Convert UTC to local time" — set the source to UTC and the destination to your time zone.
"GMT vs BST vs UTC" — GMT and UTC are the same offset (zero), but the UK switches to BST (British Summer Time, UTC+1) in summer; the tool picks the right one for your chosen date.
"Meeting time for remote teams" — add all your team's zones at once and see every local time side by side.
"Time difference between two cities" — the hour gap shown next to each result is the offset difference.

Quick tips and common mistakes

Always set the date, not just the time. DST changes mean the same clock time can have a different offset in March versus November.
IST has a half-hour offset (UTC+5:30). Many people expect whole-hour offsets everywhere — IST, Nepal (UTC+5:45), and Iran (UTC+3:30) are common surprises.
"EST" and "ET" are not always the same. ET (Eastern Time) switches between EST (UTC−5) and EDT (UTC−4) depending on the season. Use the IANA name America/New_York to avoid ambiguity.
Midnight crossings change the date. 3:00 AM IST converts to the previous evening in the US — always double-check the date in the output, not just the hour.
Check the DST status before scheduling. The US and Europe don't change clocks on the same Sunday, so the offset between them shifts for about two weeks each spring and autumn.

Snippet: IST to EST / PST / GMT at a glance

Converting 12:00 PM (noon) IST on a standard (non-DST) day:

GMT / UTC: 6:30 AM (IST is 5 hours 30 minutes ahead of UTC)
EST (New York standard time): 1:30 AM — 10 hours 30 minutes behind IST
EDT (New York summer time): 2:30 AM — 9 hours 30 minutes behind IST
PST (Los Angeles standard time): 10:30 PM the previous day — 13 hours 30 minutes behind IST
PDT (Los Angeles summer time): 11:30 PM the previous day — 12 hours 30 minutes behind IST
CET (Central European): 7:30 AM — 1 hour ahead of UTC, 4 hours 30 minutes behind IST

Because DST shifts the US clocks by one hour, the converter uses the browser's IANA data to pick the exact offset for your chosen date automatically — no manual adjustment needed.

Everything runs entirely in your browser. No times, dates, or location data are sent to any server.

Bookmark the converter above and you'll never have to do time zone arithmetic in your head again.

Related tools you might find useful

If you work with data formats alongside scheduling, these tools live on the same site and run with the same browser-only privacy:

JSON Beautifier – Format, Validate & Minify JSON Online — clean up raw JSON in one click.
JSON Validator – Check & Fix JSON Errors Online (Free) — spot syntax errors before they hit production.
JSON to YAML Converter – Convert JSON to YAML Online (Free) — switch between config formats instantly.

Time Zone Converter – Convert IST to Any World Time Zone

Time in India (IST)

World clock