WorldClockTools.
世界時計変換ツール会議プランナーCountdownsMarkets

WorldClockTools.

Time, simplified

ツール

  • 世界時計
  • タイムゾーン変換ツール
  • Timezone Reference
  • Watchlist
  • 会議プランナー
  • タイマー
  • ストップウォッチ
  • Date Calculators
  • Exact Time
  • Countdowns
  • Market Hours
  • Browse pages
  • Clock Widgets
  • Public Holidays
  • Airports

Regions

  • Americas
  • Europe
  • Asia
  • Africa
  • Oceania

Popular Cities

  • New York
  • São Paulo
  • Mexico City
  • London
  • Paris
  • Berlin
  • Tokyo
  • Shanghai
  • Mumbai
  • Lagos

変換ツール

  • EST to PST
  • PST to IST
  • GMT to EST
  • CET to EST
  • IST to GMT

Hubs

  • City Compare
  • Business overlap
  • Market Hours
  • Open now
  • Countdowns
  • Browse hub
  • Tools hub
  • Airport indexes

© 2026 WorldClockTools. All rights reserved.

都市データ提供元:GeoNames(CC BY 4.0)。タイムゾーンデータ:IANAタイムゾーンデータベース。

  1. WorldClockTools
  2. タイムゾーン変換ツール
  3. LHST -> IST

Timezone converter

LHSTからISTへの変換.

LHST → ISTGap: -5h3h 9-5 overlap

LHST to IST currently uses Lord Howe Time in Australia/Lord_Howe and India Time in Asia/Kolkata as the live reference pair. Right now the gap is -5h, and the sections below break that into meeting-time shortcuts, workday overlap, DST changes, and city coverage on both sides.

Last updated Apr 22, 2026. Offset math, DST behavior, and city coverage on both sides are refreshed from the live timezone dataset during the page revalidation window.

Reverse: IST → LHST

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

LHST

Lord Howe Time

Australia/Lord_Howe · GMT+10:30 +10:30

--:--:--

This grouping is currently anchored by the reference zone Australia/Lord_Howe.

To

IST

India Time

Asia/Kolkata · GMT+5:30 +05:30

--:--:--

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

Scheduling snapshot

Current gap

-5h

LHST +10:30 vs IST +05:30

9-to-5 overlap

3h

LHST 2:00 PM previous day to 5:00 PM previous day

Representative countries

Australia / India, Israel, and Sri Lanka

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

Pair context

LHST and IST currently connect Australia/Lord_Howe and Mumbai with a live gap of -5h. Representative coverage on the LHST side is anchored by Australia/Lord_Howe, while the IST side is anchored by Mumbai, Delhi, Bengaluru, and Hyderabad.

Using a simple 9:00 AM to 5:00 PM workday on both sides, the pair shares about 3 hours of business overlap - roughly LHST 2:00 PM previous day to 5:00 PM previous day, which is IST 9:00 AM previous day to 12:00 PM previous day. There is still a usable shared block in the morning or afternoon, so teams can usually meet without pushing too far outside standard hours.

The live gap is -5h right now, based on Australia/Lord_Howe at +10:30 and Asia/Kolkata at +05:30. Australia/Lord_Howe changes offset on October 4, 2026, so the gap moves to -5h 30m after that transition.

Market coverage on both sides

On the LHST side, the current dataset is anchored by cities such as . That makes this page useful for real-world coordination patterns rather than only abstract offset math.

On the IST side, the live reference set includes Mumbai, India; Delhi, India; Bengaluru, India; Hyderabad, India; Ahmedabad, India; Chennai, India. In practice, that means the conversion is tied to recognizable business, travel, and support hubs rather than a single anonymous timezone label.

Country usage on the two sides currently includes Australia for LHST and India, Israel, and Sri Lanka for IST. That country coverage helps explain why some pairs feel like outsourcing, logistics, gaming, finance, or travel-heavy conversions while others are more niche.

Digit-Roll Converter

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

FROM
1
4
:
3
0
TO
2
0
:
0
0

Common meeting times

LHST to IST meeting times

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

LHSTISTDay relation
9:00 AM4:00 AMThu, Apr 23same day
12:00 PM7:00 AMThu, Apr 23same day
3:00 PM10:00 AMThu, Apr 23same day
6:00 PM1:00 PMThu, Apr 23same day
9:00 PM4:00 PMThu, Apr 23same day

IST to LHST meeting times

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

ISTLHSTDay relation
9:00 AM2:00 PMWed, Apr 22same day
12:00 PM5:00 PMWed, Apr 22same day
3:00 PM8:00 PMWed, Apr 22same day
6:00 PM11:00 PMWed, Apr 22same day
9:00 PM2:00 AMThu, Apr 23next day

Operational notes

LHST to IST meeting times is easiest to read as a working-day range rather than a single spot conversion. In the current snapshot, 9:00 AM lands at 4:00 AM, while 9:00 PM lands at 4:00 PM, which makes the practical handoff window much easier to scan.

IST to LHST meeting times is easiest to read as a working-day range rather than a single spot conversion. In the current snapshot, 9:00 AM lands at 2:00 PM, while 9:00 PM lands at 2:00 AM, which makes the practical handoff window much easier to scan.

Popular hour answers

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

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

What is 8 AM LHST in IST?

8 AM LHST = 3:00 AM IST (03:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 9 AM LHST in IST?

9 AM LHST = 4:00 AM IST (04:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 10 AM LHST in IST?

10 AM LHST = 5:00 AM IST (05:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 11 AM LHST in IST?

11 AM LHST = 6:00 AM IST (06:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 12 PM LHST in IST?

12 PM LHST = 7:00 AM IST (07:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 1 PM LHST in IST?

1 PM LHST = 8:00 AM IST (08:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 2 PM LHST in IST?

2 PM LHST = 9:00 AM IST (09:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 3 PM LHST in IST?

3 PM LHST = 10:00 AM IST (10:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 4 PM LHST in IST?

4 PM LHST = 11:00 AM IST (11:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 5 PM LHST in IST?

5 PM LHST = 12:00 PM IST (12:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 6 PM LHST in IST?

6 PM LHST = 1:00 PM IST (13:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

What is 9 PM LHST in IST?

9 PM LHST = 4:00 PM IST (16:00). On today's live calendar that lands on Thu, Apr 23 in IST, which means the answer is a same day conversion rather than a static offset lookup.

Overlap window and DST radar

The live gap is -5h right now, based on Australia/Lord_Howe at +10:30 and Asia/Kolkata at +05:30. Australia/Lord_Howe changes offset on October 4, 2026, so the gap moves to -5h 30m after that transition.

The most usable workday block right now is about 3 hours: LHST 2:00 PM previous day to 5:00 PM previous day, which lines up with IST 9:00 AM previous day to 12:00 PM previous day.

Australia/Lord_Howe changes from +11:00 (GMT+11) to +11:00 (GMT+11) on October 4, 2026 at about 2:39 AM.

Reference zones

Australia/Lord_Howe

GMT+10:30 · +10:30

Asia/Kolkata

GMT+5:30 · +05:30

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

変換テーブル

LHSTIST
10:3005:30
11:3006:30
12:3007:30
13:3008:30
14:3009:30
15:3010:30
16:3011:30
17:3012:30
18:3013:30
19:3014:30
20:3015:30
21:3016:30
22:3017:30
23:3018:30
00:3019:30
01:3020:30
02:3021:30
03:3022:30
04:3023:30
05:3000:30
06:3001:30
07:3002:30
08:3003:30
09:3004:30

Top cities using LHST

Countries represented here include Australia.

This abbreviation is represented here by the reference zone Australia/Lord_Howe, not by a large city cluster.

Top cities using IST

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

MumbaiIndiaDelhiIndiaBengaluruIndiaHyderabadIndiaAhmedabadIndiaChennaiIndiaKolkataIndiaSuratIndiaPuneIndiaJaipurIndia

FAQ

How many hours is IST ahead of LHST?
IST is currently -5h relative to LHST, using Australia/Lord_Howe and Asia/Kolkata as the live reference zones on this page.
What is the best workday overlap between LHST and IST?
The current 9-to-5 overlap is about 3 hours: LHST 2:00 PM previous day to 5:00 PM previous day, which matches IST 9:00 AM previous day to 12:00 PM previous day.
Does the LHST-IST time difference change during DST?
The live gap is -5h right now, based on Australia/Lord_Howe at +10:30 and Asia/Kolkata at +05:30. Australia/Lord_Howe changes offset on October 4, 2026, so the gap moves to -5h 30m after that transition.
Which cities commonly use LHST and IST?
LHST commonly covers the reference zone Australia/Lord_Howe, while IST commonly covers cities such as Mumbai, Delhi, Bengaluru, and Hyderabad.
Should I use LHST/IST or exact IANA zones?
Use the abbreviations for a quick read, but use exact IANA zones such as Australia/Lord_Howe and Asia/Kolkata when you need something precise in software, travel plans, or long-range scheduling.
インタラクティブコンバーターを開く

関連する変換

EST → ISTPST → ISTCST → ISTMST → ISTGMT → ISTUTC → ISTIST → CETIST → JSTIST → AESTIST → BSTIST → SGTIST → HKT

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.