Time converter

Singapore to Kolkata

Kolkata is 2h 30m behind Singapore right now.

Singapore

Singapore

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Asia/Singapore

Kolkata

India

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Asia/Kolkata

Singapore zone

GMT+8 (GMT+8)

Kolkata zone

GMT+5:30 (GMT+5:30)

Difference

2h 30m behind Singapore

Business overlap

5h (9-5 windows)

Working hours overlap

Each cell is one hour in Singapore. Filled cells mark when 9 AM – 5 PM in Singapore and Kolkata both apply.

5 hours per day

12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
Singapore
GMT+8
Kolkata
GMT+5:30
Difference
-2h 30m
Business overlap
5h
Both teams 9-5One team 9-5Outside hoursNow in Singapore

Hour-by-hour conversion

Each row shows the matching local time in Kolkata for an hour in Singapore.

SingaporeKolkataDayWindow
12:00 AM9:30 PMprevious day—
1:00 AM10:30 PMprevious day—
2:00 AM11:30 PMprevious day—
3:00 AM12:30 AMsame day—
4:00 AM1:30 AMsame day—
5:00 AM2:30 AMsame day—
6:00 AM3:30 AMsame day—
7:00 AM4:30 AMsame day—
8:00 AM5:30 AMsame day—
9:00 AM6:30 AMsame day—
10:00 AM7:30 AMsame day—
11:00 AM8:30 AMsame day—
12:00 PM9:30 AMsame dayBoth 9-5
1:00 PM10:30 AMsame dayBoth 9-5
2:00 PM11:30 AMsame dayBoth 9-5
3:00 PM12:30 PMsame dayBoth 9-5
4:00 PM1:30 PMsame dayBoth 9-5
5:00 PM2:30 PMsame day—
6:00 PM3:30 PMsame day—
7:00 PM4:30 PMsame day—
8:00 PM5:30 PMsame day—
9:00 PM6:30 PMsame day—
10:00 PM7:30 PMsame day—
11:00 PM8:30 PMsame day—

Best meeting windows

If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 12:00 PM – 5:00 PM in Singapore time. That gives you 5 hours per workday for live meetings.

Tighter overlap is achievable by having the side with later working hours start earlier, or by treating the first and last hours of each side as flexible. The bar above marks every hour where both cities sit inside a 9 AM – 5 PM window.

About converting Singapore time to Kolkata time

Singapore follows the Asia/Singapore time zone (currently GMT+8, GMT+8), while Kolkata follows Asia/Kolkata (currently GMT+5:30, GMT+5:30). Kolkata is 2h 30m behind Singapore right now.

Neither city observes daylight saving time, so the offset between them is the same all year.

Reverse this conversion

Kolkata to Singapore

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Plan a meeting between Singapore and Kolkata

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Frequently asked questions

How many hours is Singapore from Kolkata?
Kolkata is 2h 30m behind Singapore right now.
What time is 9:00 AM Singapore in Kolkata?
9:00 AM in Singapore is 6:30 AM in Kolkata.
What time is 5:00 PM Singapore in Kolkata?
5:00 PM in Singapore is 2:30 PM in Kolkata.
When do Singapore and Kolkata business hours overlap?
Standard 9 AM - 5 PM working hours overlap for about 5 hours, roughly from 12:00 PM to 5:00 PM in Singapore time.
Does daylight saving time change the difference between Singapore and Kolkata?
Neither Singapore nor Kolkata observes daylight saving time, so the offset between them is constant year-round.

Local time page

Time in Singapore

Local time page

Time in Kolkata