Compare AEST vs IST
See the current time difference between AEST and IST, understand DST changes, and find the best hours to schedule meetings.
How to Find the Time Difference Between AEST and IST
Open the AEST vs IST converter: Go to https://www.xconvert.com/time-converter/aest-vs-ist to load a comparison grid with AEST and IST already shown as separate rows on a 24-hour timeline. This page is useful when you are scheduling a call between Australia’s east coast business hubs such as Brisbane and Indian cities such as Mumbai, Bengaluru, Hyderabad, Chennai, or Delhi, especially for IT services, customer support, logistics, and remote product teams.
Add relevant comparison cities with the + Add City button: Click “+ Add City” and add cities such as Sydney, Melbourne, or Brisbane on the Australian side and Mumbai, Bengaluru, or New Delhi on the Indian side to compare how local practice differs from the base AEST and IST rows. This is particularly helpful for companies coordinating software development, BPO operations, university admissions, or procurement calls, because Australia and India often work together across finance, education, mining services, and technology outsourcing.
Use Select mode and drag across the grid to mark a meeting window: Click “Select” so the grid enters selection mode, then drag across the AEST row, for example from 9:00 AM to 11:00 AM AEST, to highlight the range in purple. That selection shows the same time in IST as 4:30 AM to 6:30 AM, because IST is 4 hours 30 minutes behind AEST, which immediately tells you that a standard Australian morning meeting is too early for most teams in India and that an AEST afternoon slot like 2:00 PM to 4:00 PM maps to 9:30 AM to 11:30 AM IST, a much more practical overlap.
Adjust the range and export the result for your team: Drag the purple selection by its center to move it later in the day, or resize it with the left and right handles until you find a window that works for both sides, then use the export options: ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. For example, if you choose 3:00 PM AEST to 4:00 PM AEST, that becomes 10:30 AM to 11:30 AM IST, and exporting the slot lets an Australia-India project team send a calendar invite that appears in each participant’s local time automatically.
AEST vs IST Offset Explained
AEST (Australian Eastern Standard Time) is UTC+10:00, while IST (India Standard Time) is UTC+5:30. That means AEST is 4 hours 30 minutes ahead of IST, so when it is 9:00 AM in AEST, it is 4:30 AM in IST, and when it is 6:00 PM in IST, it is 10:30 PM in AEST. This half-hour difference matters in real scheduling because many meeting planners assume all offsets are whole hours, which can lead to missed calls.
AEST is the standard time used in parts of eastern Australia, most notably Queensland, and is closely associated with cities such as Brisbane and the Gold Coast region. IST is the single official time used across all of India, from major metros like Mumbai (population about 12.5 million city proper, over 20 million metro) and Delhi (over 16 million city proper, far more in the NCR) to technology centers like Bengaluru (around 8.4 million city proper) and Hyderabad (around 6.8 million city proper). Because India uses one nationwide time zone and does not observe daylight saving time, IST remains UTC+5:30 all year.
The main seasonal complication comes from Australia, because not every eastern Australian location stays on AEST year-round. Sydney, Melbourne, Canberra, and Hobart switch from AEST (UTC+10) to AEDT (UTC+11) during daylight saving time, while Brisbane stays on AEST throughout the year because Queensland does not observe DST. In the 2025–2026 season, daylight saving in the southeastern states begins on 5 October 2025 and ends on 5 April 2026, so during that period the difference between Sydney and IST becomes 5 hours 30 minutes, not 4 hours 30 minutes.
This distinction is important for business coordination. If an Indian engineering team is working with Brisbane, a 2:00 PM AEST meeting is always 9:30 AM IST year-round. But if the same team is working with Sydney, that 2:00 PM local time in Sydney becomes 8:30 AM IST during standard time and 7:30 AM IST during daylight saving, which can materially affect daily standups, support coverage, and handoff windows.
The overlap that usually works best for both sides is late morning to late afternoon in India paired with mid-afternoon to early evening in AEST. For example, 10:00 AM IST = 2:30 PM AEST, 1:00 PM IST = 5:30 PM AEST, and 3:00 PM IST = 7:30 PM AEST. In practical terms, teams in software development, accounting support, education services, and freight coordination often choose 2:30 PM to 5:00 PM AEST because it corresponds to 10:00 AM to 12:30 PM IST, which fits normal office hours on both sides.
Frequently Asked Questions
What is the exact time difference between AEST and IST?
AEST is 4 hours 30 minutes ahead of IST. In exact UTC terms, AEST = UTC+10:00 and IST = UTC+5:30, so you subtract 4 hours 30 minutes from AEST to get IST. For example, 12:00 PM AEST = 7:30 AM IST, and 8:00 PM IST = 12:30 AM AEST the next day.
Does the AEST to IST difference change during daylight saving time?
The difference stays 4 hours 30 minutes only when you are comparing true AEST to IST. However, many people really mean eastern Australia generally, and cities like Sydney and Melbourne move to AEDT (UTC+11:00) during daylight saving, which changes the gap with IST to 5 hours 30 minutes. In the 2025–2026 cycle, that daylight saving period runs from 5 October 2025 to 5 April 2026.
Does India have daylight saving time?
No, India does not observe daylight saving time, so IST remains UTC+5:30 throughout the entire year. This consistency makes India easier to schedule around than many countries, because the only seasonal change usually comes from the other location, such as Australia, Europe, or North America. For teams managing recurring meetings, this means any shift in the Australia-India meeting time is caused by Australian DST rules, not by India.
Is Brisbane in the same time zone as AEST all year?
Yes, Brisbane stays on AEST (UTC+10:00) all year because Queensland does not use daylight saving time. That makes Brisbane one of the simplest Australian cities to compare with India, since the gap remains a steady 4 hours 30 minutes ahead of IST in every month. For example, 3:00 PM in Brisbane is always 10:30 AM in India.
What is the best meeting time between AEST and IST for work calls?
A practical overlap is usually 2:00 PM to 5:00 PM AEST, which corresponds to 9:30 AM to 12:30 PM IST. This window works well for software teams, recruitment interviews, customer onboarding, and vendor coordination because it avoids very early mornings in India and keeps Australians within normal business hours. If the Australian participants are in Sydney or Melbourne during DST, you should recheck the page because the equivalent Indian time will shift by one additional hour earlier.
How do I convert 9 AM AEST to IST?
To convert 9:00 AM AEST to IST, subtract 4 hours 30 minutes, which gives 4:30 AM IST on the same day. This is why early Australian meetings are often difficult for India-based participants unless they are in support operations or flexible-shift roles. A better option for cross-border meetings is often 1:00 PM AEST = 8:30 AM IST or 3:00 PM AEST = 10:30 AM IST.
Why do some Australia to India conversions show a 5 hour 30 minute difference instead of 4 hour 30 minutes?
That usually happens because the comparison is not really AEST vs IST, but rather AEDT vs IST during Australian daylight saving time. AEST is fixed at UTC+10, while AEDT is UTC+11, so the gap with India increases from 4 hours 30 minutes to 5 hours 30 minutes. This is common when users search for “Australia time to India time” and are actually thinking of Sydney or Melbourne in summer.
Is AEST or IST better for scheduling support, outsourcing, or remote engineering handoffs?
Neither is universally better; it depends on whether you want overlap or staggered coverage. Because AEST is ahead of IST by 4 hours 30 minutes, India can start work later and still overlap with Australia’s afternoon, which is useful for engineering reviews, managed services, finance processing, and customer support escalations. Many companies use this gap strategically so Indian teams prepare work in their morning and hand off to Australian stakeholders in the AEST afternoon.