IST to Sydney
+5h 30mIST
ISTSOURCESydney
AESTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and AEST on the World Map
The map below highlights the IST (India Standard Time) and AEST (Australian Eastern Standard Time) timezone regions across the globe.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
AEST – Australian Eastern Standard Time
UTC+10:00Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.
- •Queensland does not observe daylight saving time, staying on AEST year-round.
- •Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
- •The Australian Securities Exchange (ASX) operates on AEST/AEDT.
- •AEST is 15 hours ahead of EST during winter.
About Sydney
WikipediaSydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
Sydney Harbour Bridge is nicknamed 'The Coathanger' due to its arch-based design.
IST to Sydney Time Difference – Complete Guide
IST (India Standard Time) operates on the India Standard Time (UTC+05:30). Sydney, Australia uses Australian Eastern Standard Time (UTC+10:00).
The time difference between IST and Sydney is 330 minutes (+5h 30m). When it's noon in IST, it's 05:30 PM in Sydney.
Why Convert IST to Sydney Time?
Navigating the time gap between IST and Sydney requires careful planning. With a difference of 5.5 hours, finding a suitable time for both locations is essential for effective collaboration. This tool simplifies the process, allowing you to instantly see the corresponding time in Sydney.
Pro Tip: If you frequently communicate with people in Sydney from IST, consider adding a dual-clock widget to your phone or computer to keep track of the 5.5-hour difference at a glance.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
About AEST (Australian Eastern Standard Time)
Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.
Best Time to Call Between IST and Sydney
If you want to reach someone in Sydney during standard business hours (9 AM – 5 PM AEST), the best time to call from IST would be:
- Sydney 9:00 AM = IST 03:30 AM
- Sydney 12:00 PM = IST 06:30 AM
- Sydney 5:00 PM = IST 11:30 AM
Business Hours Overlap
IST and Sydney have a partial business hours overlap. The best window for meetings and calls is when both locations are in their working hours.
As a final note, managing the +5h 30m difference between IST and Sydney is simple with the right tools. Keep this page handy for all your future time conversion needs.
🕐 Daylight Saving Time Info
IST
Does not observe DST
Sydney
☀ Currently in DST
Standard: UTC+10:00 · DST: UTC+11:00
Clocks fall back on Sat, Apr 4, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between IST and Sydney?
Sydney is +5h 30m from IST.
What timezone is IST in?
IST operates on its local timezone.
What timezone is Sydney in?
Sydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
What are the business hours in Sydney?
Standard business hours in Sydney are 9:00 AM - 5:00 PM AEST.
Which countries use IST (India Standard Time)?
IST is used in India, Sri Lanka.
Does IST observe daylight saving time?
No, IST does not observe daylight saving time and remains at UTC+05:30 year-round.
What are some interesting facts about IST?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
Which cities are in the AEST timezone?
Major cities in the AEST timezone include Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
What is the UTC offset for AEST?
Australian Eastern Standard Time (AEST) is at UTC+10:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEST timezone?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
When is it midnight in IST, what time is it in Sydney?
When it is 12:00 AM (midnight) in IST (IST), it is +5h 30m later in Sydney (AEST).
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