Time converter

Tokyo to Kolkata

Kolkata is 3h 30m behind Tokyo right now.

Tokyo

Japan

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Asia/Tokyo

Kolkata

India

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Asia/Kolkata

Tokyo zone

GMT+9 (GMT+9)

Kolkata zone

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

Difference

3h 30m behind Tokyo

Business overlap

4h (9-5 windows)

Working hours overlap

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

4 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
Tokyo
GMT+9
Kolkata
GMT+5:30
Difference
-3h 30m
Business overlap
4h
Both teams 9-5One team 9-5Outside hoursNow in Tokyo

Hour-by-hour conversion

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

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

Best meeting windows

If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 1:00 PM – 5:00 PM in Tokyo time. That gives you 4 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 Tokyo time to Kolkata time

Tokyo follows the Asia/Tokyo time zone (currently GMT+9, GMT+9), while Kolkata follows Asia/Kolkata (currently GMT+5:30, GMT+5:30). Kolkata is 3h 30m behind Tokyo right now.

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

Reverse this conversion

Kolkata to Tokyo

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Frequently asked questions

How many hours is Tokyo from Kolkata?
Kolkata is 3h 30m behind Tokyo right now.
What time is 9:00 AM Tokyo in Kolkata?
9:00 AM in Tokyo is 5:30 AM in Kolkata.
What time is 5:00 PM Tokyo in Kolkata?
5:00 PM in Tokyo is 1:30 PM in Kolkata.
When do Tokyo and Kolkata business hours overlap?
Standard 9 AM - 5 PM working hours overlap for about 4 hours, roughly from 1:00 PM to 5:00 PM in Tokyo time.
Does daylight saving time change the difference between Tokyo and Kolkata?
Neither Tokyo nor Kolkata observes daylight saving time, so the offset between them is constant year-round.

Local time page

Time in Tokyo

Local time page

Time in Kolkata