When the world meets at work.
Read the day in both zones.
If it's this in Kolkata, it's that in London.
When it's 8:00 am in Kolkata, it's 3:30 am in London — late night there, the same day.
When it's 10:00 am in Kolkata, it's 5:30 am in London — morning there, the same day.
When it's 12:00 pm in Kolkata, it's 7:30 am in London — morning there, the same day.
When it's 3:00 pm in Kolkata, it's 10:30 am in London — late morning there, the same day.
When it's 5:00 pm in Kolkata, it's 12:30 pm in London — midday there, the same day.
When it's 9:00 pm in Kolkata, it's 4:30 pm in London — afternoon there, the same day.
Crossing the border. Money, language, plugs.
Money changes hands at the border: Kolkata uses the INR (₹) and London uses the GBP (£). Conversations can stay in English, which is official in both countries. Cars drive on the left in both, so rentals feel familiar.
- Country
- India
- Capital
- New Delhi
- Currency
- Indian rupee (INR · ₹)
- Language
- English, Hindi, Tamil
- Calling code
- +91
- Drives on
- Left
- Country
- United Kingdom
- Capital
- London
- Currency
- British pound (GBP · £)
- Language
- English
- Calling code
- +44
- Drives on
- Left
Quick answers. Before you book the call.
What's the time difference between Kolkata and London?
Kolkata is 4.5 hours behind London. Kolkata runs on GMT+5:30 and London on GMT+1. The gap can shift by an hour when either side enters or leaves daylight saving — the live clocks above always reflect the current offset.
When it's 10 am in Kolkata, what time is it in London?
10:00 am in Kolkata is 5:30 am in London on the same day — morning there. The same shift applies to any hour; the quick-conversion cards and the 24-hour table above cover the full day.
When it's 3 pm in Kolkata, what time is it in London?
3:00 pm in Kolkata is 10:30 am in London on the same day — late morning there. The same shift applies to any hour; the quick-conversion cards and the 24-hour table above cover the full day.
When's the best time to schedule a meeting?
There are 3 hours where both cities are inside a 09:00–17:00 workday. Aim for the middle of that window so neither side is starting or closing out.
Does daylight saving time change the difference?
Yes, if either city observes DST. When one side shifts and the other doesn't, the gap changes by one hour. The DST badges under each clock show whether each zone is currently shifted and when the next transition lands.
How far is Kolkata from London?
About 7,962 km as the crow flies (great-circle distance). A non-stop commercial flight cruises that in roughly 9h 52m, not counting airport time, winds, or routing around restricted airspace.
Can I send this meeting time as a calendar invite?
Yes. Pick a time on the slider above, open the meeting card, customize the title and duration, then download the .ics file. It imports cleanly into Google Calendar, Outlook, and Apple Calendar with the correct timezone attached.
What currency do Kolkata and London use?
Kolkata uses the Indian rupee (INR, ₹); London uses the British pound (GBP, £). Check the live rate before transferring money or paying with a card abroad — most banks add a 1–3 % FX margin on top of the mid-market rate.
How do I call Kolkata from London?
Dial the international prefix used by your carrier (often 00), then +91, then the local number — drop any leading zero of the city or mobile code. For free calls, WhatsApp, Signal, and FaceTime work over Wi-Fi regardless of country code.
What language is spoken in Kolkata and London?
Both India and United Kingdom count English among their official languages, so business meetings often skip translation. Kolkata also has Hindi, Tamil; London adds no other official tongue.
Do Kolkata and London drive on the same side of the road?
Yes — both drive on the left. Rental cars feel identical between the two.