Time in Kolkata vs Rio de Janeiro
Kolkata keeps IST (UTC+5:30) and Rio de Janeiro keeps UTC−3 (UTC−3) today. Rio de Janeiro is 8½ hours behind 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: 09:00–10:00 in Rio de Janeiro (17:00–18:00 your time).
| City | 00:00 in Kolkata | 01:00 in Kolkata | 02:00 in Kolkata | 03:00 in Kolkata | 04:00 in Kolkata | 05:00 in Kolkata | 06:00 in Kolkata | 07:00 in Kolkata | 08:00 in Kolkata | 09:00 in Kolkata | 10:00 in Kolkata | 11:00 in Kolkata | 12:00 in Kolkata | 13:00 in Kolkata | 14:00 in Kolkata | 15:00 in Kolkata | 16:00 in Kolkata | 17:00 in Kolkata | 18:00 in Kolkata | 19:00 in Kolkata | 20:00 in Kolkata | 21:00 in Kolkata | 22:00 in Kolkata | 23:00 in Kolkata |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Rio de Janeiro—— | 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 Kolkata and Rio de Janeiro
Best hours to call
17:00 in Kolkata
Inside working hours on both sides
09:00 in Rio de Janeiro
Where daylight saving pulls them apart
Neither Kolkata nor Rio de Janeiro changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Rio de Janeiro of Kolkata?
Rio de Janeiro is 8½ hours behind 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 Rio de Janeiro?
Any hour in 17:00–18:00 Kolkata time is inside working hours in both cities.
Do Kolkata and Rio de Janeiro change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.