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About this tool
Convert time between Colombo and Chicago with live clocks and the current, daylight-saving-aware time difference.
See what time it is in Chicago 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 Chicago on America/Chicago (CT); 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 Chicago time, or press swap to convert the other way. Nothing is uploaded.
Open Colombo to Chicago Time Converter on AltFTool — it loads instantly in your browser.
Read the live clocks at the top for the current time in Colombo and Chicago.
Type a specific time into the Colombo field to see the matching Chicago time and date.
Press swap to convert Chicago times to Colombo instead.
The current local time in Colombo and Chicago updates every second, with each city's UTC offset and abbreviation shown.
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.
Enter a specific Colombo time to see the exact Chicago time for today, including the date if the conversion crosses midnight.
It runs entirely in your browser — no account, and no times are sent anywhere.
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 Chicago uses America/Chicago.
Type 9:00 into the Colombo field above and the converter shows the matching Chicago time for today, daylight saving included. It also shows the Chicago date in case the time crosses midnight.
Yes. It uses your browser's own time-zone data (Asia/Colombo for Colombo, America/Chicago for Chicago), which carries each region's daylight-saving rules, so the result stays correct all year.
Yes — press the swap button and the converter flips to show Chicago → Colombo, with the same live clocks and time picker.
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.
Add the Colombo to Chicago 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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