Kolkata zone
GMT+5:30 (GMT+5:30)
Cairo zone
GMT+3 (GMT+3)
Difference
2h 30m behind Kolkata
Business overlap
5h (9-5 windows)
Working hours overlap
Each cell is one hour in Kolkata. Filled cells mark when 9 AM – 5 PM in Kolkata and Cairo both apply.
5 hours per day
- Kolkata
- GMT+5:30
- Cairo
- GMT+3
- Difference
- -2h 30m
- Business overlap
- 5h
Hour-by-hour conversion
Each row shows the matching local time in Cairo for an hour in Kolkata.
| Kolkata | Cairo | Day | Window |
|---|---|---|---|
| 12:00 AM | 9:30 PM | previous day | — |
| 1:00 AM | 10:30 PM | previous day | — |
| 2:00 AM | 11:30 PM | previous day | — |
| 3:00 AM | 12:30 AM | same day | — |
| 4:00 AM | 1:30 AM | same day | — |
| 5:00 AM | 2:30 AM | same day | — |
| 6:00 AM | 3:30 AM | same day | — |
| 7:00 AM | 4:30 AM | same day | — |
| 8:00 AM | 5:30 AM | same day | — |
| 9:00 AM | 6:30 AM | same day | — |
| 10:00 AM | 7:30 AM | same day | — |
| 11:00 AM | 8:30 AM | same day | — |
| 12:00 PM | 9:30 AM | same day | Both 9-5 |
| 1:00 PM | 10:30 AM | same day | Both 9-5 |
| 2:00 PM | 11:30 AM | same day | Both 9-5 |
| 3:00 PM | 12:30 PM | same day | Both 9-5 |
| 4:00 PM | 1:30 PM | same day | Both 9-5 |
| 5:00 PM | 2:30 PM | same day | — |
| 6:00 PM | 3:30 PM | same day | — |
| 7:00 PM | 4:30 PM | same day | — |
| 8:00 PM | 5:30 PM | same day | — |
| 9:00 PM | 6:30 PM | same day | — |
| 10:00 PM | 7:30 PM | same day | — |
| 11:00 PM | 8:30 PM | same day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 12:00 PM – 5:00 PM in Kolkata time. That gives you 5 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 Cairo time
Kolkata follows the Asia/Kolkata time zone (currently GMT+5:30, GMT+5:30), while Cairo follows Africa/Cairo (currently GMT+3, GMT+3). Cairo is 2h 30m behind Kolkata right now.
Cairo observes daylight saving time, while Kolkata does not. The offset between the two cities changes by one hour at the daylight saving transitions.
Daylight saving transitions in 2026
Kolkata
Does not observe daylight saving time.
Cairo
- Spring forward · Thursday, April 23, 2026
- Fall back · Thursday, October 29, 2026
Reverse this conversion
Cairo to Kolkata
Open the converter
Plan a meeting between Kolkata and Cairo
More conversions from Kolkata
Frequently asked questions
- How many hours is Kolkata from Cairo?
- Cairo is 2h 30m behind Kolkata right now.
- What time is 9:00 AM Kolkata in Cairo?
- 9:00 AM in Kolkata is 6:30 AM in Cairo.
- What time is 5:00 PM Kolkata in Cairo?
- 5:00 PM in Kolkata is 2:30 PM in Cairo.
- When do Kolkata and Cairo business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 5 hours, roughly from 12:00 PM to 5:00 PM in Kolkata time.
- Does daylight saving time change the difference between Kolkata and Cairo?
- Cairo observes daylight saving time while Kolkata does not, so the offset between them changes by one hour twice a year.
Local time page
Time in Kolkata
Local time page
Time in Cairo