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IST to AEST time converter

Daylight saving handled

Convert a time in India to Sydney and Melbourne time, or back, on any date. The difference is 4 hours 30 minutes when Sydney and Melbourne is on AEST and 5 hours 30 minutes during AEDT; the converter picks the right one for the date you enter.

How to use it

  1. Pick the date and the time in India (or press swap to go the other way).
  2. Read the AEST time, with the date if it changes.
  3. Use the hour table to find times inside office hours in both places (green).

Details

India
IST, UTC+5:30 all year; India has no daylight saving
Sydney and Melbourne
AEST (UTC+10) in winter, AEDT (UTC+11) in summer
Clock changes
Daylight time in New South Wales and Victoria runs from the first Sunday in October to the first Sunday in April: ends 5 April 2026, starts 4 October 2026, ends 4 April 2027. Queensland (Brisbane) has no daylight saving
Overlap
Sydney is ahead: 9:00 a.m. in Sydney is 4:30 a.m. IST (AEST) or 3:30 a.m. IST (AEDT), so Indian mornings meet Australian afternoons

Questions

What is the time difference between IST and AEST?

4 hours 30 minutes while Sydney and Melbourne is on standard time (AEST (UTC+10)), and 5 hours 30 minutes during daylight time (AEDT (UTC+11)). India does not change its clocks, so the difference changes only when Sydney and Melbourne does.

Does Brisbane change its clocks?

No. Queensland stays on AEST (UTC+10) all year, so from October to April Brisbane is an hour behind Sydney. This page uses Sydney time.

When do the clocks change?

Daylight time in New South Wales and Victoria runs from the first Sunday in October to the first Sunday in April: ends 5 April 2026, starts 4 October 2026, ends 4 April 2027. Queensland (Brisbane) has no daylight saving. The converter shows the next change for both places.

How is daylight saving worked out?

From the time-zone database built into your browser (the IANA tz database), the same data phones and calendars use, so future and past dates are correct too.

Does it need an account or send anything?

No. It runs in this page with your device's clock. Nothing is stored on a server.