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Working hours
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09
End
18
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AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Kolkata vs Tokyo

Kolkata keeps IST (UTC+5:30) and Tokyo keeps JST (UTC+9) today. Tokyo is 3½ hours ahead of Kolkata; the rows below read both clocks live.

The working day, side by side

Hours shaded in both rows are inside working hours in both cities: 13:00–18:00 in Tokyo (09:00–14:00 your time).

Kolkata and Tokyo hour by hour, with the working-hour overlap shaded
City00:00 in Kolkata01:00 in Kolkata02:00 in Kolkata03:00 in Kolkata04:00 in Kolkata05:00 in Kolkata06:00 in Kolkata07:00 in Kolkata08:00 in Kolkata09:00 in Kolkata10:00 in Kolkata11:00 in Kolkata12:00 in Kolkata13:00 in Kolkata14:00 in Kolkata15:00 in Kolkata16:00 in Kolkata17:00 in Kolkata18:00 in Kolkata19:00 in Kolkata20:00 in Kolkata21:00 in Kolkata22:00 in Kolkata23:00 in Kolkata
Kolkata——000102030405060708091011121314151617181920212223
Tokyo——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Kolkata and Tokyo

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Kolkata, Tokyo and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

09:00 in Kolkata
Inside working hours on both sides
13:00 in Tokyo
10:00 in Kolkata
Inside working hours on both sides
14:00 in Tokyo
11:00 in Kolkata
Inside working hours on both sides
15:00 in Tokyo
12:00 in Kolkata
Inside working hours on both sides
16:00 in Tokyo

Where daylight saving pulls them apart

Neither Kolkata nor Tokyo changes its clocks, so the gap above holds all year.

Also useful

Common questions

How many hours ahead is Tokyo of Kolkata?

Tokyo is 3½ hours ahead of Kolkata right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Kolkata and Tokyo?

Any hour in 09:00–14:00 Kolkata time is inside working hours in both cities.

Do Kolkata and Tokyo change clocks on the same date?

Neither city changes its clocks, so the gap between them never moves.