This IST to AEST converter turns any time in India Standard Time (IST) into Australian Eastern Standard Time (AEST), using your device clock so daylight saving is applied automatically. AEST is 5 hours 30 minutes ahead of IST when both zones are on standard time, and 4 hours 30 minutes ahead during the summer months when clocks have shifted. IST is UTC+5:30; AEST is UTC+10 (AEDT: UTC+11).
IST covers Mumbai, Delhi, Bengaluru; AEST covers Sydney, Melbourne, Canberra. Because only AEST observes daylight saving time, the difference is not constant through the year. The tables below show both cases, and the converter at the top always uses the rule in force on the date you pick.
IST and AEST UTC offsets
IST
UTC+5:30
India Standard Time
No daylight saving time
AEST
UTC+10
Australian Eastern Standard Time
AEDT UTC+11 from April 5 to October 4, 2026
IST to AEST conversion table (standard time)
| IST | AEST |
|---|---|
| 12 am | 5:30 am |
| 3 am | 8:30 am |
| 6 am | 11:30 am |
| 8 am | 1:30 pm |
| 9 am | 2:30 pm |
| 10 am | 3:30 pm |
| 11 am | 4:30 pm |
| 12 pm | 5:30 pm |
| 1 pm | 6:30 pm |
| 2 pm | 7:30 pm |
| 3 pm | 8:30 pm |
| 4 pm | 9:30 pm |
| 5 pm | 10:30 pm |
| 6 pm | 11:30 pm |
| 8 pm | 1:30 amnext day |
| 10 pm | 3:30 amnext day |
IST to AEST during daylight saving
Between the dates listed above, the difference is 4 hours 30 minutes instead of 5 hours 30 minutes.
| IST | AEST/AEDT |
|---|---|
| 12 am | 4:30 am |
| 3 am | 7:30 am |
| 6 am | 10:30 am |
| 8 am | 12:30 pm |
| 9 am | 1:30 pm |
| 10 am | 2:30 pm |
| 11 am | 3:30 pm |
| 12 pm | 4:30 pm |
| 1 pm | 5:30 pm |
| 2 pm | 6:30 pm |
| 3 pm | 7:30 pm |
| 4 pm | 8:30 pm |
| 5 pm | 9:30 pm |
| 6 pm | 10:30 pm |
| 8 pm | 12:30 amnext day |
| 10 pm | 2:30 amnext day |
Frequently asked questions
What is the time difference between IST and AEST?
AEST is 5 hours 30 minutes ahead of IST on standard time. During daylight saving the gap changes to 4 hours 30 minutes. That comes from the UTC offsets: IST is UTC+5:30 and AEST is UTC+10. For example, 9 am IST = 2:30 pm AEST, and in summer 9 am IST = 1:30 pm AEST.
Is AEST ahead of or behind IST?
AEST is 5 hours 30 minutes ahead of IST, so when it is noon in IST it is 5:30 pm in AEST. Ahead means the clock there already shows a later time; a call at 5 pm IST lands at 10:30 pm AEST.
Does IST or AEST observe daylight saving time in 2026?
IST keeps UTC+5:30 all year. AEST switches to AEDT (UTC+11) on April 5 and back on October 4. Between those dates the difference in the table above shifts by an hour, which is the usual cause of missed calls in spring and autumn.
What is the best time for a meeting between IST and AEST?
Standard office hours (9 am to 5 pm) overlap from 9 am to 11.5 am IST, which is 2.5 pm to 5 pm AEST. Pick a slot inside that window and both sides stay within a normal working day. Check the daylight saving dates above, because the window moves by an hour when only one side has changed clocks.
Which cities use IST and AEST?
IST (India Standard Time) is used in Mumbai, Delhi, Bengaluru, Kolkata. AEST (Australian Eastern Standard Time) is used in Sydney, Melbourne, Canberra, Brisbane (no DST). Some cities inside a zone skip daylight saving, noted in parentheses, so their offset matches only part of the year.