Chicago to Ratnapura time converter

Ratnapura is 10 hours 30 minutes ahead of Chicago. When it is 9:00 AM in Chicago, it is 7:30 PM in Ratnapura.

Chicago CDT

Tuesday, October 20, 2026

Ratnapura IST

Tuesday, October 20, 2026

Chicago
Illinois, United States
Tue, Oct 20
CDTUTC-5
Ratnapura
Sri Lanka
Tue, Oct 20
ISTUTC+5:30+10h 30m
Finding your time zone…
Shared working hours (9:00–18:00)

Chicago to Ratnapura conversion table

Every hour of today in Chicago and the matching time in Ratnapura. Light rows are typical working hours (9:00–18:00).

ChicagoRatnapura
12:00 AM10:30 AM
1:00 AM11:30 AM
2:00 AM12:30 PM
3:00 AM1:30 PM
4:00 AM2:30 PM
5:00 AM3:30 PM
6:00 AM4:30 PM
7:00 AM5:30 PM
8:00 AM6:30 PM
9:00 AM7:30 PM
10:00 AM8:30 PM
11:00 AM9:30 PM
12:00 PM10:30 PM
1:00 PM11:30 PM
2:00 PM12:30 AM+1 day
3:00 PM1:30 AM+1 day
4:00 PM2:30 AM+1 day
5:00 PM3:30 AM+1 day
6:00 PM4:30 AM+1 day
7:00 PM5:30 AM+1 day
8:00 PM6:30 AM+1 day
9:00 PM7:30 AM+1 day
10:00 PM8:30 AM+1 day
11:00 PM9:30 AM+1 day

Best time to call or meet

Working hours don't overlap fully. The closest fit is 9:00 AM – 11:30 AM in Chicago (7:30 PM – 10:00 PM in Ratnapura): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Chicago and Ratnapura switch clocks on different dates:

  • Oct 20, 2026 – Nov 1, 2026: +10h 30m
  • Nov 1, 2026 – Mar 14, 2027: +11h 30m
  • Mar 14, 2027 – Oct 20, 2027: +10h 30m

Distance

Chicago and Ratnapura are 14,483 km (8,999 miles) apart in a straight line.

More conversions

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Questions and answers

What is the time difference between Chicago and Ratnapura?

Ratnapura is 10 hours 30 minutes ahead of Chicago.

What time is it in Ratnapura when it is 9 AM in Chicago?

When it is 9:00 AM in Chicago, it is 7:30 PM in Ratnapura.

When is the best time to call Ratnapura from Chicago?

Working hours don't overlap fully. The closest fit is 9:00 AM – 11:30 AM in Chicago (7:30 PM – 10:00 PM in Ratnapura): working hours on one side, early or late on the other.

Does the time difference between Chicago and Ratnapura change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.