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