AEST to IST Converter & Meeting Planner
Quick answer: 9:00 AM AEST = 4:30 AM IST (fixed +10:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Australian Eastern Standard Time (AEST) and Indian Standard Time (IST)? You need to account for the standard time difference. Indian Standard Time is normally 4.5 hours behind Australian Eastern Standard Time. Whether you are coordinating between teams in Sydney and Melbourne and Mumbai and New Delhi, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM AEST = 7:30 PM IST. The full 24-hour AEST to IST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM AEST = 10:30 AM IST.
| AEST Time | IST Time |
|---|---|
| 12:00 AM (00:00) | 7:30 PM (19:30)-1 day |
| 1:00 AM (01:00) | 8:30 PM (20:30)-1 day |
| 2:00 AM (02:00) | 9:30 PM (21:30)-1 day |
| 3:00 AM (03:00) | 10:30 PM (22:30)-1 day |
| 4:00 AM (04:00) | 11:30 PM (23:30)-1 day |
| 5:00 AM (05:00) | 12:30 AM (00:30) |
| 6:00 AM (06:00) | 1:30 AM (01:30) |
| 7:00 AM (07:00) | 2:30 AM (02:30) |
| 8:00 AM (08:00) | 3:30 AM (03:30) |
| 9:00 AM (09:00) | 4:30 AM (04:30) |
| 10:00 AM (10:00) | 5:30 AM (05:30) |
| 11:00 AM (11:00) | 6:30 AM (06:30) |
| 12:00 PM (12:00) | 7:30 AM (07:30) |
| 1:00 PM (13:00) | 8:30 AM (08:30) |
| 2:00 PM (14:00) | 9:30 AM (09:30) |
| 3:00 PM (15:00) | 10:30 AM (10:30) |
| 4:00 PM (16:00) | 11:30 AM (11:30) |
| 5:00 PM (17:00) | 12:30 PM (12:30) |
| 6:00 PM (18:00) | 1:30 PM (13:30) |
| 7:00 PM (19:00) | 2:30 PM (14:30) |
| 8:00 PM (20:00) | 3:30 PM (15:30) |
| 9:00 PM (21:00) | 4:30 PM (16:30) |
| 10:00 PM (22:00) | 5:30 PM (17:30) |
| 11:00 PM (23:00) | 6:30 PM (18:30) |
Best time to call Mumbai from Sydney
For most work calls, compare the normal business day in Sydney (AEST) with the business day in Mumbai (IST). AEST commonly covers Oceania, Australia, while IST is mainly associated with South Asia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 2:00 PM - 5:00 PM AEST, which corresponds to 9:30 AM - 12:30 PM IST. This window sits inside the typical AEST workday (9:00 AM - 5:00 PM) and the IST workday (9:30 AM - 6:30 PM).
- DST Safety: AEST or IST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Australian Securities Exchange (ASX): 10:00-16:00 local time in Sydney.
- Bombay Stock Exchange (BSE): 09:15-15:30 local time in Mumbai.
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Frequently Asked Questions
What is the time difference between AEST and IST?
During standard time, Indian Standard Time is 4.5 hours behind Australian Eastern Standard Time.
Does all of eastern Australia observe Daylight Saving Time?
No — eastern Australia is split on DST. New South Wales (Sydney), Victoria (Melbourne), Tasmania (Hobart), and the ACT (Canberra) advance their clocks to AEDT (UTC+11) each October, while Queensland (Brisbane) opts out entirely and remains on AEST (UTC+10) year-round. This means Sydney and Brisbane run on the same clock for only part of the year.
What is the difference between AEST and AEDT?
AEST (Australian Eastern Standard Time) is the UTC+10:00 offset observed during the Southern Hemisphere winter months, roughly April through October. AEDT (Australian Eastern Daylight Time) is the UTC+11:00 offset applied during the Southern Hemisphere summer when clocks spring forward in October, observed by New South Wales, Victoria, Tasmania, and the ACT.
Does India observe Daylight Saving Time (DST)?
India does not observe Daylight Saving Time and has not done so since 1945. IST remains fixed at UTC+5:30 every day of the year, meaning the offset between India and any DST-observing country shifts by one hour twice annually when those countries change their clocks.
Why does IST have a 30-minute offset?
India chose the 82.5° East meridian — which passes through Mirzapur in Uttar Pradesh — as its central reference longitude, as it bisects the subcontinent geographically. That meridian sits exactly 5 hours and 30 minutes ahead of the Prime Meridian in Greenwich, producing the UTC+5:30 offset that has defined IST since 1906.