Kolkata to Sydney Time Difference

Sydney is 4 hours and 30 minutes ahead of Kolkata. The best window for a call is 9 AM–12:30 PM in Kolkata, which is 1:30 PM–5 PM in Sydney — an overlap of 3 hours and 30 minutes inside 9 AM–5 PM on both sides. Clocks change on October 4, 2026, which briefly shifts the gap between Kolkata and Sydney — the converter on this page always reflects the correct offset for the date you pick.

• When it's 9:00 AM in Kolkata, it's 1:30 PM in Sydney.
• When it's 9:00 AM in Sydney, it's 4:30 AM in Kolkata.

Sydney is currently 4 hours and 30 minutes ahead of Kolkata.

The 9 AM – 5 PM business windows in Kolkata and Sydney overlap for 3 hours and 30 minutes. 9 AM–12:30 PM in Kolkata is 1:30 PM–5 PM in Sydney. Aim somewhere in the middle of that window so neither side starts cold or finishes drained.

On October 4, 2026, Sydney shifts for daylight saving. After that, Sydney will be 5 hours and 30 minutes ahead of Kolkata (currently 4 hours and 30 minutes ahead of Kolkata). The converter and the tables above always reflect the correct offset for the date you pick.

• Kolkata does not observe daylight saving time.
• Sydney is not currently observing daylight saving time (standard time is in effect).

Frequently asked questions

Is Sydney ahead of or behind Kolkata?

Sydney is 4 hours and 30 minutes ahead of Kolkata.

How many hours ahead of Kolkata is Sydney?

Sydney is 4 hours and 30 minutes ahead of Kolkata.

What time is 9 AM in Kolkata in Sydney?

9:00 AM in Kolkata is 1:30 PM in Sydney.

What time is noon in Kolkata in Sydney?

12:00 PM in Kolkata is 4:30 PM in Sydney.

What time is 5 PM in Kolkata in Sydney?

5:00 PM in Kolkata is 9:30 PM in Sydney. Useful for end-of-day handoffs between the two offices.

What time is 3 PM in Kolkata in Sydney?

3:00 PM in Kolkata is 7:30 PM in Sydney.

Is Kolkata currently observing daylight saving time?

Kolkata does not observe daylight saving time — its UTC offset stays the same all year.

Is Sydney currently observing daylight saving time?

Sydney observes daylight saving time seasonally, but is not currently on DST (standard time is in effect).

Do Kolkata and Sydney observe daylight saving?

On October 4, 2026, Sydney shifts for daylight saving. After that, Sydney will be 5 hours and 30 minutes ahead of Kolkata (currently 4 hours and 30 minutes ahead of Kolkata). The converter and the tables above always reflect the correct offset for the date you pick.

When is the best time to call Sydney from Kolkata?

Aim for 9 AM–12:30 PM in Kolkata, which is 1:30 PM–5 PM in Sydney.

When is the best time to call Kolkata from Sydney?

Aim for 1:30 PM–5 PM in Sydney, which is 9 AM–12:30 PM in Kolkata.

Kolkata (IST) to Sydney (AEST) — how do I convert quickly?

Add 4 hours and 30 minutes to Kolkata local time to get Sydney local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.

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