Mumbai is currently 4.5 hours behind Sydney. Convert time between Mumbai and Sydney, see the exact difference, and find the best hours for calls and meetings.
Mumbai uses India Standard Time. Sydney uses Australian Eastern Standard Time. Mumbai time is 4.5 hours behind Sydney. So, when it is 12:00 AM in Mumbai, it is 4:30 AM in Sydney.
Common Mumbai times and their Sydney equivalents.
| Mumbai Time | Sydney Time |
|---|---|
| 12:00 AM Mumbai | 4:30 AM Sydney |
| 1:00 AM Mumbai | 5:30 AM Sydney |
| 2:00 AM Mumbai | 6:30 AM Sydney |
| 3:00 AM Mumbai | 7:30 AM Sydney |
| 4:00 AM Mumbai | 8:30 AM Sydney |
| 5:00 AM Mumbai | 9:30 AM Sydney |
| 6:00 AM Mumbai | 10:30 AM Sydney |
| 7:00 AM Mumbai | 11:30 AM Sydney |
| 8:00 AM Mumbai | 12:30 PM Sydney |
| 9:00 AM Mumbai | 1:30 PM Sydney |
| 10:00 AM Mumbai | 2:30 PM Sydney |
| 11:00 AM Mumbai | 3:30 PM Sydney |
| 12:00 PM Mumbai | 4:30 PM Sydney |
| 1:00 PM Mumbai | 5:30 PM Sydney |
| 2:00 PM Mumbai | 6:30 PM Sydney |
| 3:00 PM Mumbai | 7:30 PM Sydney |
| 4:00 PM Mumbai | 8:30 PM Sydney |
| 5:00 PM Mumbai | 9:30 PM Sydney |
| 6:00 PM Mumbai | 10:30 PM Sydney |
| 7:00 PM Mumbai | 11:30 PM Sydney |
| 8:00 PM Mumbai | 12:30 AM Sydney |
| 9:00 PM Mumbai | 1:30 AM Sydney |
| 10:00 PM Mumbai | 2:30 AM Sydney |
| 11:00 PM Mumbai | 3:30 AM Sydney |
India uses India Standard Time (IST, UTC+5:30) year-round with no Daylight Saving Time. The unusual 30-minute offset from UTC reflects a compromise made during India's unification — the country spans two natural time zone widths but uses a single zone for national cohesion. IST applies to all Indian cities including Delhi, Mumbai, Bangalore, Chennai, Kolkata, and Hyderabad.
Sydney uses Australian Eastern Standard Time (AEST, UTC+10) in winter and Australian Eastern Daylight Time (AEDT, UTC+11) in summer. Because Australia is in the Southern Hemisphere, its summer runs October–April — the opposite of the Northern Hemisphere. Clocks go forward on the first Sunday of October and back on the first Sunday of April.
Both Mumbai and Sydney may observe Daylight Saving Time, which means the offset between them can change twice a year. Here is what to expect each season.
| Period | Note | Mumbai | Sydney | Offset |
|---|---|---|---|---|
| Nov – Mar | Both on standard time | GMT+5:30 (UTC+5:30) | GMT+11 (UTC+11) | 5.5 hours |
| Mar – late Mar | US clocks forward, some zones still on standard | GMT+5:30 (UTC+5:30) | GMT+11 (UTC+11) | 5.5 hours |
| Late Mar – Oct current | Both on summer / daylight time | GMT+5:30 (UTC+5:30) | GMT+10 (UTC+10) | 4.5 hours |
| Late Oct – early Nov | Clocks transitioning — check exact date | GMT+5:30 (UTC+5:30) | GMT+11 (UTC+11) | 5.5 hours |
The transition window typically lasts 1–2 weeks in spring and autumn. If you have a recurring weekly meeting near a clock change, verify the exact date to avoid a missed call.
Mumbai is currently 4.5 hours behind Sydney. Mumbai uses India Standard Time (UTC+5:30) and Sydney uses Australian Eastern Standard Time (UTC+10).
The best overlap window is 9:00 am–1.5:00 pm Mumbai time, which corresponds to 1.5:00 pm–6:00 pm Sydney time. Both cities are within standard business hours (9 am–6 pm) during this window.
When it is 9:00 AM in Mumbai, it is 1.5:00 pm in Sydney. Mumbai is 4.5 hours behind Sydney.
When it is 5:00 PM in Sydney, it is 0.5:00 pm in Mumbai.
Sydney observes Daylight Saving Time but Mumbai does not. This means the offset between the two cities changes by one hour when Sydney transitions its clocks. Always verify the current offset when scheduling meetings near DST transition dates.