Kolkata zone
GMT+5:30 (GMT+5:30)
UTC zone
UTC (GMT-0)
Difference
5h 30m behind Kolkata
Business overlap
2h (9-5 windows)
Working hours overlap
Each cell is one hour in Kolkata. Filled cells mark when 9 AM – 5 PM in Kolkata and UTC both apply.
2 hours per day
- Kolkata
- GMT+5:30
- UTC
- GMT-0
- Difference
- -5h 30m
- Business overlap
- 2h
Hour-by-hour conversion
Each row shows the matching local time in UTC for an hour in Kolkata.
| Kolkata | UTC | Day | Window |
|---|---|---|---|
| 12:00 AM | 6:30 PM | previous day | — |
| 1:00 AM | 7:30 PM | previous day | — |
| 2:00 AM | 8:30 PM | previous day | — |
| 3:00 AM | 9:30 PM | previous day | — |
| 4:00 AM | 10:30 PM | previous day | — |
| 5:00 AM | 11:30 PM | previous day | — |
| 6:00 AM | 12:30 AM | same day | — |
| 7:00 AM | 1:30 AM | same day | — |
| 8:00 AM | 2:30 AM | same day | — |
| 9:00 AM | 3:30 AM | same day | — |
| 10:00 AM | 4:30 AM | same day | — |
| 11:00 AM | 5:30 AM | same day | — |
| 12:00 PM | 6:30 AM | same day | — |
| 1:00 PM | 7:30 AM | same day | — |
| 2:00 PM | 8:30 AM | same day | — |
| 3:00 PM | 9:30 AM | same day | Both 9-5 |
| 4:00 PM | 10:30 AM | same day | Both 9-5 |
| 5:00 PM | 11:30 AM | same day | — |
| 6:00 PM | 12:30 PM | same day | — |
| 7:00 PM | 1:30 PM | same day | — |
| 8:00 PM | 2:30 PM | same day | — |
| 9:00 PM | 3:30 PM | same day | — |
| 10:00 PM | 4:30 PM | same day | — |
| 11:00 PM | 5:30 PM | same day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 3:00 PM – 5:00 PM in Kolkata time. That gives you 2 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 Kolkata time to UTC time
Kolkata follows the Asia/Kolkata time zone (currently GMT+5:30, GMT+5:30), while UTC follows UTC (currently UTC, GMT-0). UTC is 5h 30m behind Kolkata right now.
Neither city observes daylight saving time, so the offset between them is the same all year.
Reverse this conversion
UTC to Kolkata
Open the converter
Plan a meeting between Kolkata and UTC
More conversions from Kolkata
Frequently asked questions
- How many hours is Kolkata from UTC?
- UTC is 5h 30m behind Kolkata right now.
- What time is 9:00 AM Kolkata in UTC?
- 9:00 AM in Kolkata is 3:30 AM in UTC.
- What time is 5:00 PM Kolkata in UTC?
- 5:00 PM in Kolkata is 11:30 AM in UTC.
- When do Kolkata and UTC business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 2 hours, roughly from 3:00 PM to 5:00 PM in Kolkata time.
- Does daylight saving time change the difference between Kolkata and UTC?
- Neither Kolkata nor UTC observes daylight saving time, so the offset between them is constant year-round.
Local time page
Time in Kolkata
Local time page
Time in UTC