Kolkata to Sydney Time Difference
Sydney is 4 hours 30 min ahead of Kolkata. When it is noon in Kolkata, it is 16.5:00 in Sydney.
Kolkata (UTC+5:30) → Sydney (UTC+10)
🕐 Interactive Time Explorer
When it's 01:00 in Kolkata, it's 5.5:00 in Sydney
Drag the slider to see corresponding times in both cities
🤝 Best Meeting Times
Kolkata & Sydney✓ Perfect Match (4 hours)
◐ Extended Hours (6 hours)
✈️ Travel Information
Distance
9,139 km
Est. Flight Time
~11.8h
Time Difference
+4.5h
Work Hours Overlap
4h
Good
🔴 Office Closed
Today 09:00
09:00 - 13:00
⏰ Quick Conversion
06:00
Kolkata
10.5:00
Sydney
09:00
Kolkata
13.5:00
Sydney
12:00
Kolkata
16.5:00
Sydney
15:00
Kolkata
19.5:00
Sydney
18:00
Kolkata
22.5:00
Sydney
21:00
Kolkata
1.5:00
Sydney (+1)
00:00
Kolkata
4.5:00
Sydney
03:00
Kolkata
7.5:00
Sydney
Frequently Asked Questions
How many hours is Kolkata behind Sydney?
Sydney is 4 hours 30 min ahead of Kolkata. When it is 12:00 noon in Kolkata, it is 16.5:00 in Sydney. Kolkata operates on Asia/Kolkata (UTC+5.5), while Sydney uses Australia/Sydney (UTC+10).
What is the best time to call Sydney from Kolkata?
There are 4 hours of overlapping business time (9 AM–5 PM) between Kolkata and Sydney. The best window is 09:00–13:00 Kolkata time (13.5:00–17.5:00 in Sydney).
Does the Kolkata to Sydney time difference change throughout the year?
The time difference can shift by up to one hour when either city observes Daylight Saving Time (DST). DST transition dates differ between countries — typically March/April in the Northern Hemisphere and October in the Southern Hemisphere. Always verify the live difference above when scheduling important meetings near DST changeover dates.
Flying between Kolkata and Sydney
The distance between Kolkata and Sydney is approximately 9,139 km. A direct flight typically takes around 11.8 hours. Your arrival clock will show local Sydney time — use our Flight Time Calculator to predict exact arrival times.