Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

IST to PST

-13h 30m

IST

ISTSOURCE

UTC+05:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

PST

UTC-07:00☀ DST active

HH10

MM30

(previous day)22:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

IST

PST

12:00 AM

11:30 AM-1

2:00 AM

1:30 PM-1

4:00 AM

3:30 PM-1

6:00 AM

5:30 PM-1

8:00 AM

7:30 PM-1

10:00 AM

9:30 PM-1

12:00 PM

11:30 PM-1

2:00 PM

1:30 AM

4:00 PM

3:30 AM

6:00 PM

5:30 AM

8:00 PM

7:30 AM

10:00 PM

9:30 AM

Green rows indicate typical business hours (9 AM - 5 PM)

IST and PST on the World Map

The map below highlights the IST (India Standard Time) and PST (Pacific Standard Time) timezone regions across the globe.

IST Zone

→

PST Zone

Explore all world timezones interactively →

IST – India Standard Time

UTC+05:30

India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.

Countries in IST

IndiaSri Lanka

Major Cities in IST

MumbaiDelhiBangaloreKolkataChennaiHyderabadPuneAhmedabadColomboJaipurLucknowSurat

Key Facts about IST

•India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
•India uses a single time zone despite spanning 30° of longitude.
•IST is one of only a handful of time zones with a 30-minute offset.
•IST is the most populous single time zone in the world with over 1.4 billion people.
•The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.

Daylight Saving:No – UTC+05:30 year-round

Learn more about IST on Wikipedia

PST – Pacific Standard Time

UTC-08:00

Pacific Standard Time (PST) is the time zone for the US and Canadian Pacific coast, 8 hours behind UTC.

Countries in PST

United States (Pacific)Canada (British Columbia)Mexico (Baja California)

Major Cities in PST

Los AngelesSan FranciscoSeattleVancouverSan DiegoPortlandLas VegasSacramentoSan JoseTijuana

Key Facts about PST

•Silicon Valley and the world's biggest tech companies operate on Pacific Time.
•The Hollywood film industry runs on PST/PDT.
•PST is 3 hours behind EST, creating a significant business hours gap.
•Vancouver, Canada's third-largest city, uses PST.

Daylight Saving:Yes – switches to PDT

Learn more about PST on Wikipedia

Comparing Time Zones: IST and PST

IST runs on India Standard Time (IST) at UTC+05:30. PST runs on Pacific Standard Time (PST) at UTC-08:00. That puts IST 13 hours 30 minutes behind PST — a difference of -13h 30m at the current offsets.

In practice, when it is 9:00 AM in IST it is 7:30 PM in PST on the previous day. Midnight in IST is 10:30 AM in PST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

IST to PST time conversion table

IST (IST)	PST (PST)	Day
12:00 AM	10:30 AM	previous day
6:00 AM	4:30 PM	previous day
7:00 AM	5:30 PM	previous day
8:00 AM	6:30 PM	previous day
9:00 AM	7:30 PM	previous day
12:00 PM	10:30 PM	previous day
3:00 PM	1:30 AM	same day
5:00 PM	3:30 AM	same day
6:00 PM	4:30 AM	same day
9:00 PM	7:30 AM	same day

Why people convert IST to PST time

Scheduling a call from IST to PST: a 10:00 AM start in IST lands at 8:30 PM in PST the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -13h 30m gap: IST and PST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in PST is 7:30 PM in IST.
Watching a live event or market open: IST viewers need 7:30 PM in PST to catch a 9:00 AM start there, and 1:30 PM if the event is anchored to IST.

Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a -13h 30m gap is not.
With a -13h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week IST takes the early slot, the next week PST does.

About IST (India Standard Time)

India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.

About PST (Pacific Standard Time)

Pacific Standard Time (PST) covers the west coast of North America, including tech hubs like San Francisco and Seattle, and entertainment capital Los Angeles. The Pacific Time Zone is home to Silicon Valley and the world's largest technology companies. During summer, clocks advance to Pacific Daylight Time (PDT, UTC-07:00). PST is also observed in Baja California, Mexico.

Best time to call between IST and PST

With a -13h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. PST opens at 9:00 AM PST, which is 7:30 PM in IST, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

IST and PST have no shared working hours because of the -13h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.

IST is 13 hours 30 minutes behind PST (IST UTC+05:30 → PST UTC-08:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

IST

Does not observe DST

PST

☀ Currently in DST

Standard: UTC-08:00 · DST: UTC-07:00

Clocks fall back on Sun, Nov 1, 2026

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between IST and PST?

IST (IST, UTC+05:30) is 13 hours 30 minutes behind PST (PST, UTC-08:00). The gap is currently -13h 30m.

How do I convert IST time to PST time?

Add -13h 30m to IST local time. For example, 9:00 AM in IST is 7:30 PM in PST (previous day).

What time is it in PST right now?

PST uses PST at UTC-08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h 30m offset from IST.