India Standard Time (ist) is used in India. The IANA timezone identifier is Asia/Kolkata.

IST to SYDNEY Time Converter

Q: Where is sydney used?

SYDNEY (Sydney) (sydney) is used in Australia. The IANA timezone identifier is Australia/Sydney.

India Standard Time → SYDNEY (Sydney)

IST = UTC+5:30SYDNEY = UTC+10

⚠️ IST is ambiguous — on this page it means India Standard Time. It also refers to:

Ireland Standard Time (Dublin) → SYDNEY ↗Israel Standard Time (Jerusalem) → SYDNEY ↗

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

Sydney

Australia · +4.5h

13:30

London

United Kingdom · -4.5h

04:30

New York

USA · -9.5h

23:30-1 day

Tokyo

Japan · +3.5h

12:30

Dubai

United Arab Emirates · -1.5h

07:30

IST (Mumbai) vs Sydney — time difference

IST (Mumbai) is 5 hours 30 minutes behind Sydney. When IST (Mumbai) clocks hit noon, Sydney reads 16:00.

IST (Mumbai) runs on Asia/Kolkata; Sydney runs on Australia/Sydney. Together they are 4.5 hours 30 minutes apart.

Shared working hours

Every working day, IST (Mumbai) and Sydney are both in business hours for 3.5 hours simultaneously.

00:0006:0012:0018:0024:00

IST (Mumbai)

Sydney

Overlap (3.5h)

Best times to schedule a meeting

There is a 3.5-hour daily window where both locations are in business hours. The 3 best slots are listed below.

09:00 Mumbai / 13:00 Sydney✓ Both working

10:00 Mumbai / 14:00 Sydney✓ Both working

11:00 Mumbai / 15:00 Sydney✓ Both working

Working hours defined as 09:00–17:00 local time for each location.

Holiday calendar for both locations

IST (Mumbai)

No upcoming public holidays this year.

Sydney7 holidays

Aug 3Picnic Day

Sep 28King's Birthday

Oct 5Labour Day

Oct 5King's Birthday

Nov 3Melbourne Cup

Working across IST (Mumbai) and Sydney

The 4.5-hour gap between IST (Mumbai) (India) and Sydney (Australia) requires some planning — but a 3.5-hour daily overlap means both teams can connect in real time without unusual scheduling.

💡 Best practice for cross-timezone meetings

✅

If you are in IST (Mumbai), aim for 09:00–10:00, which corresponds to 13:00–14:00 in Sydney — both teams are within working hours.

✅

If you are in IST (Mumbai), aim for 10:00–11:00, which corresponds to 14:00–15:00 in Sydney — both teams are within working hours.

✅

If you are in IST (Mumbai), aim for 11:00–12:00, which corresponds to 15:00–16:00 in Sydney — both teams are within working hours.

Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.

Add to your browser — Free →

Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am IST (Mumbai)".

IST (Mumbai) ↔ SYDNEY (Sydney)

4h of business hours overlap daily (09:00–17:00)

IST (Mumbai)

SYDNEY (Sydney)

00:00

04:30

01:00

05:30

02:00

06:30

03:00

07:30

04:00

08:30

05:00

09:30Working

06:00

10:30Working

07:00

11:30Working

08:00

12:30Working

09:00Working

13:30Working

10:00Working

14:30Working

11:00Working

15:30Working

12:00Working

16:30Working

13:00Working

17:30off

14:00Working

18:30off

15:00Working

19:30off

16:00Working

20:30off

17:00

21:30

18:00

22:30

19:00

23:30

20:00

00:30+1d

21:00

01:30+1d

22:00

02:30+1d

23:00

03:30+1d

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between ist and sydney?

India Standard Time (ist) is UTC+5:30 and SYDNEY (Sydney) (sydney) is UTC+10. The difference between them is 4.5 hours.

Where is ist used?

India Standard Time (ist) is used in India and surrounding regions. The IANA timezone identifier is Asia/Kolkata. Note: ist is ambiguous and may refer to other timezones.

Where is sydney used?

SYDNEY (Sydney) (sydney) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Sydney.

How do I convert ist to sydney?

Use the interactive converter above. Drag the time slider to any ist time and the sydney equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular IST conversions

IST → London IST → New York IST → Tokyo IST → Dubai IST → Sydney IST → Paris IST → Berlin IST → Singapore IST → Los Angeles IST → Toronto

Popular SYDNEY conversions

London → SYDNEY New York → SYDNEY Tokyo → SYDNEY Dubai → SYDNEY Paris → SYDNEY Berlin → SYDNEY Singapore → SYDNEY Los Angeles → SYDNEY Toronto → SYDNEY Mumbai → SYDNEY