Kolkata to London Time Converter
Convert time between Kolkata and London with live clocks and the current, daylight-saving-aware time difference.
About this tool
Kolkata to London Time Converter
Convert time between Kolkata and London with live clocks and the current, daylight-saving-aware time difference.
See what time it is in London when you know the time in Kolkata — this converter shows both cities' clocks live and the exact current time difference between them, adjusted automatically for daylight saving. Kolkata runs on the Asia/Kolkata zone (IST) and London on Europe/London (GMT); the tool reads your browser's own time-zone data, so the offset is always right even across the days each city changes its clocks. Type any Kolkata time to pin the matching London time, or press swap to convert the other way. Nothing is uploaded.
How to use Kolkata to London Time Converter
- 1
Open Kolkata to London Time Converter on AltFTool — it loads instantly in your browser.
- 2
Read the live clocks at the top for the current time in Kolkata and London.
- 3
Type a specific time into the Kolkata field to see the matching London time and date.
- 4
Press swap to convert London times to Kolkata instead.
Why use Kolkata to London Time Converter
Live clocks for both cities
The current local time in Kolkata and London updates every second, with each city's UTC offset and abbreviation shown.
Daylight-saving aware
Offsets come from the browser's IANA time-zone database, so the difference is correct on either side of a daylight-saving change — no stale table.
Pick any time
Enter a specific Kolkata time to see the exact London time for today, including the date if the conversion crosses midnight.
Free and private
It runs entirely in your browser — no account, and no times are sent anywhere.
Common use cases
- Scheduling a call or meeting between Kolkata and London without miscounting the hours.
- Working out when a live event in London starts in Kolkata local time.
- Planning travel or a deadline across the Kolkata–London time difference.
Frequently asked questions
What is the time difference between Kolkata and London?
It can change through the year because one or both cities observe daylight saving, so the converter above shows the current difference live rather than a fixed number. Kolkata uses Asia/Kolkata and London uses Europe/London.
What time is it in London when it's 9:00 AM in Kolkata?
Type 9:00 into the Kolkata field above and the converter shows the matching London time for today, daylight saving included. It also shows the London date in case the time crosses midnight.
Does this converter handle daylight saving between Kolkata and London?
Yes. It uses your browser's own time-zone data (Asia/Kolkata for Kolkata, Europe/London for London), which carries each region's daylight-saving rules, so the result stays correct all year.
Can it convert London time to Kolkata time as well?
Yes — press the swap button and the converter flips to show London → Kolkata, with the same live clocks and time picker.
Is the Kolkata to London time conversion accurate and private?
It relies on the standard IANA time-zone database built into your browser, not an approximation, and makes no network calls, so your times stay on your device.
Embed this tool on your site
Add the Kolkata to London Time Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
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