Time in Tokyo vs Kolkata
Tokyo keeps JST (UTC+9) and Kolkata keeps IST (UTC+5:30) today. Kolkata is 3½ hours behind Tokyo; 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: 09:00–15:00 in Kolkata (12:00–18:00 your time).
| City | 00:00 in Tokyo | 01:00 in Tokyo | 02:00 in Tokyo | 03:00 in Tokyo | 04:00 in Tokyo | 05:00 in Tokyo | 06:00 in Tokyo | 07:00 in Tokyo | 08:00 in Tokyo | 09:00 in Tokyo | 10:00 in Tokyo | 11:00 in Tokyo | 12:00 in Tokyo | 13:00 in Tokyo | 14:00 in Tokyo | 15:00 in Tokyo | 16:00 in Tokyo | 17:00 in Tokyo | 18:00 in Tokyo | 19:00 in Tokyo | 20:00 in Tokyo | 21:00 in Tokyo | 22:00 in Tokyo | 23:00 in Tokyo |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tokyo—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Kolkata—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
- Working hours
- Shoulder
- Night
- Overlap
Do more with Tokyo and Kolkata
Best hours to call
12:00 in Tokyo
Inside working hours on both sides
09:00 in Kolkata
13:00 in Tokyo
Inside working hours on both sides
10:00 in Kolkata
14:00 in Tokyo
Inside working hours on both sides
11:00 in Kolkata
15:00 in Tokyo
Inside working hours on both sides
12:00 in Kolkata
Where daylight saving pulls them apart
Neither Tokyo nor Kolkata changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Kolkata of Tokyo?
Kolkata is 3½ hours behind Tokyo right now. The gap is not fixed: it moves whenever either side changes its clocks.
What is the best time to call between Tokyo and Kolkata?
Any hour in 12:00–18:00 Tokyo time is inside working hours in both cities.
Do Tokyo and Kolkata change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.