Convert India Standard Time to Australian Eastern Standard Time
Instantly convert India Standard Time (IST) to Australian Eastern Standard Time (AEST) with our free online calculator.
India Standard Time
10:50:51 AM
Wed, Jun 24 (IST)
Australian Eastern Standard Time
03:20:51 PM
Wed, Jun 24 (AEST)
Convert a Specific Time
24-Hour Comparison
| IST | AEST |
|---|---|
| 12:00 AM | 4.5:00 AM |
| 1:00 AM | 5.5:00 AM |
| 2:00 AM | 6.5:00 AM |
| 3:00 AM | 7.5:00 AM |
| 4:00 AM | 8.5:00 AM |
| 5:00 AM | 9.5:00 AM |
| 6:00 AM | 10.5:00 AM |
| 7:00 AM | 11.5:00 AM |
| 8:00 AM | 0.5:00 PM |
| 9:00 AM | 1.5:00 PM |
| 10:00 AM | 2.5:00 PM |
| 11:00 AM | 3.5:00 PM |
| 12:00 PM | 4.5:00 PM |
| 1:00 PM | 5.5:00 PM |
| 2:00 PM | 6.5:00 PM |
| 3:00 PM | 7.5:00 PM |
| 4:00 PM | 8.5:00 PM |
| 5:00 PM | 9.5:00 PM |
| 6:00 PM | 10.5:00 PM |
| 7:00 PM | 11.5:00 PM |
| 8:00 PM | 0.5:00 AM(+1d) |
| 9:00 PM | 1.5:00 AM(+1d) |
| 10:00 PM | 2.5:00 AM(+1d) |
| 11:00 PM | 3.5:00 AM(+1d) |
How to Convert India Standard Time to Australian Eastern Standard Time
Formula
To convert India Standard Time (IST) to Australian Eastern Standard Time (AEST): Convert IST to AEST
About India Standard Time (IST)
India Standard Time (IST, IANA: Asia/Kolkata) is the civil time of the Republic of India and Sri Lanka, set at UTC+5:30 — one of the world's most populous 30-minute-offset time zones. India does not observe Daylight Saving Time per the Government of India directive (a brief DST trial in 1942-1945 during WWII was discontinued; subsequent proposals from 2010-2017 were rejected by the Indian Government citing minimal energy savings + agricultural sector disruption). IST is defined as the local mean solar time at 82.5°E longitude (passing through Shankargarh fort in Uttar Pradesh, with the reference clock at the National Physical Laboratory in New Delhi per the Indian Institute of Astrophysics). The 30-minute offset is preserved because India's east-west extent (68°E to 97°E) spans ~28° of longitude — approximately 2 hours of solar time — and the central meridian is most representative for a single unified zone. IST serves approximately 1.4 billion people in India + 22 million in Sri Lanka (Sri Lanka observes SLST = UTC+5:30, identical to IST). Major cities: Mumbai (12.5M), Delhi (16.8M, NCR 29M), Bengaluru (8.4M), Hyderabad (10M), Chennai (7M), Kolkata (4.5M), Ahmedabad (5.5M), Pune (3.1M). Affects: BSE/NSE stock exchanges, IPL Indian Premier League cricket schedules.
About Australian Eastern Standard Time (AEST)
Australian Eastern Standard Time (AEST, IANA: Australia/Sydney) is the civil time of Australia's most populous eastern states — New South Wales (NSW), Victoria (VIC), Queensland (QLD), Tasmania (TAS), Australian Capital Territory (ACT) — set at UTC+10:00. AEST is observed in winter; NSW + VIC + TAS + ACT switch to Australian Eastern Daylight Time (AEDT = UTC+11) from the first Sunday of October to the first Sunday of April. Queensland does NOT observe DST (stays on AEST year-round) — a state-level decision affirmed by referendums in 1992. AEST serves approximately 21 million Australians — about 80% of the country's population. AEST is identical in offset to Vladivostok Time (Russia), Papua New Guinea Time (PGT), Guam-Chamorro Time (CHST), and the US-territory Northern Mariana Islands. Major AEST cities: Sydney NSW (5.4M metro — largest Australian city + ASX home), Melbourne VIC (5.1M metro — 2nd-largest), Brisbane QLD (2.6M metro — 3rd-largest, on AEST year-round), Gold Coast QLD (725K — tourist coastline), Newcastle NSW (475K), Canberra ACT (450K — federal capital), Hobart TAS (250K — Tasmanian capital). Affects: ASX trading hours 10:00-16:00 AEST, Australian Cricket / AFL game scheduling, Great Barrier Reef + Sydney Opera House tourism operating hours.