Kolkata to GMT
Kolkata ↔ GMT · Greenwich Mean Time. Right now, GMT is −5.5h relative to Kolkata. DST is honored live.
From
To
Kolkata
—
GMT
—
00:00Kolkata hour of day23:30
Live offset
−5.5h
Kolkata (May 24) ↔ GMT (May 23)
If Kolkata or GMT just shifted for daylight saving, that's already reflected.
Best meeting overlap
3:00 PM – 4:00 PM
Kolkata time. Equivalent GMT: 9:30 AM – 10:30 AM
Working hours = 9 AM – 5 PM in each zone.
Hour-by-hour
Kolkata → GMT, every hour
Kolkata · May 24GMT · May 23
- 12:00 AM6:30 PM
- 1:00 AM7:30 PM
- 2:00 AM8:30 PM
- 3:00 AM9:30 PM
- 4:00 AM10:30 PM
- 5:00 AM11:30 PM
- 6:00 AM+1d12:30 AM
- 7:00 AM+1d1:30 AM
- 8:00 AM+1d2:30 AM
- 9:00 AM+1d3:30 AM
- 10:00 AM+1d4:30 AM
- 11:00 AM+1d5:30 AM
- 12:00 PM+1d6:30 AM
- 1:00 PM+1d7:30 AM
- 2:00 PM+1d8:30 AM
- 3:00 PM+1d9:30 AM
- 4:00 PM+1d10:30 AM
- 5:00 PM+1d11:30 AM
- 6:00 PM+1d12:30 PM
- 7:00 PM+1d1:30 PM
- 8:00 PM+1d2:30 PM
- 9:00 PM+1d3:30 PM
- 10:00 PM+1d4:30 PM
- 11:00 PM+1d5:30 PM
Both zones in working hours±1d = the TO side lands on a different calendar day
FAQ
Kolkata ↔ GMT, questions answered
- What's the current time difference between Kolkata and GMT?
- Right now, GMT (GMT · Greenwich Mean Time) is −5.5h relative to Kolkata (Kolkata). The number is live and reflects the current daylight-saving status of both zones.
- Does this converter account for daylight saving time?
- Yes. The math is done against IANA's tz database via Intl.DateTimeFormat, so DST shifts in either zone show up immediately at the transition. Around DST boundaries the conversion can move by an hour from one week to the next — this page always reflects the current rule.
- Why does the TO column sometimes show "+1d" or "−1d"?
- When the Kolkata hour lands on a different calendar day in GMT, we flag it so you don't accidentally schedule a meeting on the wrong date. Kolkata 11 PM is often the next day in eastern-hemisphere zones, for example.
- How do I schedule a meeting that works for both zones?
- Look at the row highlighted lume green — that's the longest contiguous block where both Kolkata and GMT are in standard working hours (9 AM–5 PM local). Open the planner from the link above to lock a specific time and share a DST-stable link with the other party.