Colombo to Kolkata Time Converter
Convert time between Colombo and Kolkata with live clocks and the current, daylight-saving-aware time difference.
About this tool
Colombo to Kolkata Time Converter
Convert time between Colombo and Kolkata with live clocks and the current, daylight-saving-aware time difference.
See what time it is in Kolkata when you know the time in Colombo — this converter shows both cities' clocks live and the exact current time difference between them, adjusted automatically for daylight saving. Colombo runs on the Asia/Colombo zone (IST) and Kolkata on Asia/Kolkata (IST); 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 Colombo time to pin the matching Kolkata time, or press swap to convert the other way. Nothing is uploaded.
How to use Colombo to Kolkata Time Converter
- 1
Open Colombo to Kolkata Time Converter on AltFTool — it loads instantly in your browser.
- 2
Read the live clocks at the top for the current time in Colombo and Kolkata.
- 3
Type a specific time into the Colombo field to see the matching Kolkata time and date.
- 4
Press swap to convert Kolkata times to Colombo instead.
Why use Colombo to Kolkata Time Converter
Live clocks for both cities
The current local time in Colombo and Kolkata 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 Colombo time to see the exact Kolkata 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 Colombo and Kolkata without miscounting the hours.
- Working out when a live event in Kolkata starts in Colombo local time.
- Planning travel or a deadline across the Colombo–Kolkata time difference.
Frequently asked questions
What is the time difference between Colombo and Kolkata?
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. Colombo uses Asia/Colombo and Kolkata uses Asia/Kolkata.
What time is it in Kolkata when it's 9:00 AM in Colombo?
Type 9:00 into the Colombo field above and the converter shows the matching Kolkata time for today, daylight saving included. It also shows the Kolkata date in case the time crosses midnight.
Does this converter handle daylight saving between Colombo and Kolkata?
Yes. It uses your browser's own time-zone data (Asia/Colombo for Colombo, Asia/Kolkata for Kolkata), which carries each region's daylight-saving rules, so the result stays correct all year.
Can it convert Kolkata time to Colombo time as well?
Yes — press the swap button and the converter flips to show Kolkata → Colombo, with the same live clocks and time picker.
Is the Colombo to Kolkata 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 Colombo to Kolkata Time Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
<iframe src="https://www.altftool.com/embed/widget/colombo-to-kolkata-time-converter"
title="Colombo to Kolkata Time Converter — free AltFTool widget"
width="100%" height="640" style="border:0;border-radius:12px;overflow:hidden"
loading="lazy" referrerpolicy="no-referrer-when-downgrade" allow="clipboard-write"></iframe>
<p style="font-size:12px;margin:4px 0 0">Widget by <a href="https://www.altftool.com/tools/all/colombo-to-kolkata-time-converter?utm_source=embed&utm_medium=widget" rel="nofollow">AltFTool — free online tools</a></p>