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Données des villes par GeoNames (CC BY 4.0). Données de fuseaux horaires de la base de données des fuseaux horaires de l'IANA.

  1. WorldClockTools
  2. Convertisseur de Fuseau Horaire
  3. IST -> PDT

Timezone converter

Convertisseur IST vers PDT.

IST → PDTGap: -12h 30mNo 9-5 overlap

IST to PDT currently uses India Time in Asia/Kolkata and Pacific Time in America/Los_Angeles as the live reference pair, with a -12h 30m live gap. IST to PDT matters whenever Mumbai and Los Angeles need to coordinate across a -12h 30m gap. The IST side covers India and Israel, while PDT covers United States and Mexico — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.

Last updated Apr 26, 2026. Offset math, DST behavior, and city coverage on both sides are refreshed from the live timezone dataset during the page revalidation window.

How this is calculated

How we calculate this
The current offset for each abbreviation is resolved against the live IANA timezone rules. Conversion accounts for DST transitions on both sides, so the gap between IST and PDT can change by an hour twice a year.
Data sources
IANA Time Zone Database (offsets, DST). City attribution from GeoNames (CC BY 4.0).
Update cadence
Page regenerates daily; live offset values reflect the moment the page is rendered.
Reverse: PDT → IST

Ambiguity note

IST is ambiguous in this dataset, so the live converter uses Asia/Kolkata as the busiest reference zone while the city list below shows the wider label family.

From

IST

India Time

Asia/Kolkata · GMT+5:30 +05:30

--:--:--

Major markets in this grouping include Mumbai, Delhi, Bengaluru, Hyderabad.

To

PDT

Pacific Time

America/Los_Angeles · PDT -07:00

--:--:--

Major markets in this grouping include Los Angeles, Tijuana, San Diego, Mexicali.

Scheduling snapshot

Current gap

-12h 30m

IST +05:30 vs PDT -07:00

9-to-5 overlap

No shared block

Meetings usually need an early or late handoff.

Representative countries

India, Israel, and Sri Lanka / United States, Mexico, and Canada

Based on the busiest city and zone usage found in the current dataset.

Pair context

IST (Mumbai, +05:30) to PDT (Los Angeles, -07:00) is currently a -12h 30m conversion. Live coverage on the IST side is anchored by Mumbai, Delhi, Bengaluru, and Hyderabad; the PDT side draws from Los Angeles, Tijuana, San Diego, and Mexicali.

IST to PDT matters whenever Mumbai and Los Angeles need to coordinate across a -12h 30m gap. The IST side covers India and Israel, while PDT covers United States and Mexico — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.

This pair is trans-Pacific, with one side in the Americas and the other in Asia or Oceania. The -12h 30m gap is large enough that morning on one side reliably overlaps evening on the other, which is why this conversion mostly serves global supply chains, gaming launch schedules, and follow-the-sun engineering.

PDT follows seasonal clock changes through America/Los_Angeles, while IST stays on a fixed offset year-round. The result is a gap that quietly shifts by an hour twice a year — short by an hour in winter (or summer, depending on hemisphere) and back to normal afterwards.

IST and PDT sit 12h 30m apart, which leaves no shared 9-to-5 block. Live meetings have to bend one side's day, so most teams settle for one of two narrow windows: very early on the late side, or very late on the early side. That makes async messages, recorded standups, and clear handoff notes more valuable than calendar invites.

Market coverage on both sides

IST coverage on this page is led by Mumbai, India, Delhi, India, Bengaluru, India, and Hyderabad, India, with 2 more in the live dataset. That mix is what makes IST feel anchored to South and Southeast Asian business hubs in practice rather than just an abbreviation on a chart.

PDT coverage is led by Los Angeles, United States, Tijuana, Mexico, San Diego, United States, and Mexicali, Mexico, with 2 more anchoring the wider label family. Combined with the IST side, this conversion ends up describing trans-Pacific outsourcing handoffs, gaming and entertainment release windows, and follow-the-sun engineering rotations.

Digit-Roll Converter

Adjust the time — digits roll like an odometer. Swap button flips the zones.

FROM
1
4
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3
0
TO
0
7
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Common meeting times

IST to PDT meeting times

Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.

ISTPDTDay relation
9:00 AM8:30 PMSun, Apr 26previous day
12:00 PM11:30 PMSun, Apr 26previous day
3:00 PM2:30 AMMon, Apr 27same day
6:00 PM5:30 AMMon, Apr 27same day
9:00 PM8:30 AMMon, Apr 27same day

PDT to IST meeting times

Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.

PDTISTDay relation
9:00 AM9:30 PMSun, Apr 26same day
12:00 PM12:30 AMMon, Apr 27next day
3:00 PM3:30 AMMon, Apr 27next day
6:00 PM6:30 AMMon, Apr 27next day
9:00 PM9:30 AMMon, Apr 27next day

Operational notes

IST to PDT ranges from IST 9:00 AM (which lands at PDT 8:30 PM) through IST 9:00 PM (PDT 8:30 AM). With no clean 9-to-5 overlap between IST and PDT, both ends of this range push outside standard hours — useful for recorded standups and async work, awkward for live calls.

PDT to IST ranges from PDT 9:00 AM (which lands at IST 9:30 PM) through PDT 9:00 PM (IST 9:30 AM). Most of those slots fall on a different calendar day on the IST side, which is why this direction always needs explicit dates in invites and ticket comments — the time alone is not enough.

Popular hour answers

These direct answers are here for the exact-intent searches people actually use, like “10 AM IST to PDT” or “4 PM IST in PDT”.

8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM9 PM

What is 8 AM IST in PDT?

8 AM IST = 7:30 PM PDT (19:30). On today's live calendar that lands on Sun, Apr 26 in PDT, which means the answer is a previous day conversion rather than a static offset lookup.

What is 9 AM IST in PDT?

9 AM IST = 8:30 PM PDT (20:30). On today's live calendar that lands on Sun, Apr 26 in PDT, which means the answer is a previous day conversion rather than a static offset lookup.

What is 10 AM IST in PDT?

10 AM IST = 9:30 PM PDT (21:30). On today's live calendar that lands on Sun, Apr 26 in PDT, which means the answer is a previous day conversion rather than a static offset lookup.

What is 11 AM IST in PDT?

11 AM IST = 10:30 PM PDT (22:30). On today's live calendar that lands on Sun, Apr 26 in PDT, which means the answer is a previous day conversion rather than a static offset lookup.

What is 12 PM IST in PDT?

12 PM IST = 11:30 PM PDT (23:30). On today's live calendar that lands on Sun, Apr 26 in PDT, which means the answer is a previous day conversion rather than a static offset lookup.

What is 1 PM IST in PDT?

1 PM IST = 12:30 AM PDT (00:30). On today's live calendar that lands on Mon, Apr 27 in PDT, which means the answer is a same day conversion rather than a static offset lookup.

What is 2 PM IST in PDT?

2 PM IST = 1:30 AM PDT (01:30). On today's live calendar that lands on Mon, Apr 27 in PDT, which means the answer is a same day conversion rather than a static offset lookup.

What is 3 PM IST in PDT?

3 PM IST = 2:30 AM PDT (02:30). On today's live calendar that lands on Mon, Apr 27 in PDT, which means the answer is a same day conversion rather than a static offset lookup.

What is 4 PM IST in PDT?

4 PM IST = 3:30 AM PDT (03:30). On today's live calendar that lands on Mon, Apr 27 in PDT, which means the answer is a same day conversion rather than a static offset lookup.

What is 5 PM IST in PDT?

5 PM IST = 4:30 AM PDT (04:30). On today's live calendar that lands on Mon, Apr 27 in PDT, which means the answer is a same day conversion rather than a static offset lookup.

What is 6 PM IST in PDT?

6 PM IST = 5:30 AM PDT (05:30). On today's live calendar that lands on Mon, Apr 27 in PDT, which means the answer is a same day conversion rather than a static offset lookup.

What is 9 PM IST in PDT?

9 PM IST = 8:30 AM PDT (08:30). On today's live calendar that lands on Mon, Apr 27 in PDT, which means the answer is a same day conversion rather than a static offset lookup.

Overlap window and DST radar

The live gap is -12h 30m right now, based on Asia/Kolkata at +05:30 and America/Los_Angeles at -07:00. America/Los_Angeles changes offset on November 1, 2026, so the gap moves to -13h 30m after that transition.

There is no strict 9 AM to 5 PM overlap right now, so this pair is better for handoffs, travel planning, or async coordination than for midday meetings.

America/Los_Angeles changes from -08:00 (PST) to -08:00 (PST) on November 1, 2026 at about 1:03 AM.

Reference zones

Asia/Kolkata

GMT+5:30 · +05:30

America/Los_Angeles

PDT · -07:00

These are the busiest live references selected from the abbreviation families on this page.

Tableau de Conversion

ISTPDT
05:3017:00
06:3018:00
07:3019:00
08:3020:00
09:3021:00
10:3022:00
11:3023:00
12:3000:00
13:3001:00
14:3002:00
15:3003:00
16:3004:00
17:3005:00
18:3006:00
19:3007:00
20:3008:00
21:3009:00
22:3010:00
23:3011:00
00:3012:00
01:3013:00
02:3014:00
03:3015:00
04:3016:00

Top cities using IST

Countries represented here include India, Israel, and Sri Lanka.

MumbaiIndiaDelhiIndiaBengaluruIndiaHyderabadIndiaAhmedabadIndiaChennaiIndiaKolkataIndiaSuratIndiaPuneIndiaJaipurIndia

Top cities using PDT

Countries represented here include United States, Mexico, and Canada.

Los AngelesUnited StatesTijuanaMexicoSan DiegoUnited StatesMexicaliMexicoSan JoseUnited StatesSan FranciscoUnited StatesSeattleUnited StatesVancouverCanadaPortlandUnited StatesLas VegasUnited States

FAQ

How many hours is PDT ahead of IST?
PDT is currently -12h 30m relative to IST, using Asia/Kolkata and America/Los_Angeles as the live reference zones on this page.
What is the best workday overlap between IST and PDT?
There is no strict 9-to-5 overlap right now, so one side usually needs an early start or late finish for live meetings.
Does the IST-PDT time difference change during DST?
The live gap is -12h 30m right now, based on Asia/Kolkata at +05:30 and America/Los_Angeles at -07:00. America/Los_Angeles changes offset on November 1, 2026, so the gap moves to -13h 30m after that transition.
Which cities commonly use IST and PDT?
IST commonly covers cities such as Mumbai, Delhi, Bengaluru, and Hyderabad, while PDT commonly covers cities such as Los Angeles, Tijuana, San Diego, and Mexicali.
Should I use IST/PDT or exact IANA zones?
Use the abbreviations for a quick read, but use exact IANA zones such as Asia/Kolkata and America/Los_Angeles when you need something precise in software, travel plans, or long-range scheduling.
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Conversions Associées

EST → ISTPST → ISTCST → ISTMST → ISTGMT → ISTUTC → ISTIST → CETIST → CESTIST → JSTIST → AESTIST → AEDTIST → BST

Related planning pages

Once a conversion pair matters, people usually need a city page, compare page, or a broader browse surface next.

Interactive converter

Move from this static pair into the full timezone converter with more cities and abbreviations.

Compare city pairs

Use compare pages when the practical question is overlap, not just offset arithmetic.

World clock

Open live city clocks after narrowing the timezone pair you care about.

Browse city pages

Jump into the strongest city pages when you want location-specific timezone context.