Chicago to Boulder time converter

Boulder is 1 hour behind Chicago. When it is 9:00 AM in Chicago, it is 8:00 AM in Boulder.

Chicago CDT

Friday, October 16, 2026

Boulder MDT

Friday, October 16, 2026

Chicago
Illinois, United States
Fri, Oct 16
CDTUTC-5
Boulder
Colorado, United States
Fri, Oct 16
MDTUTC-6-1h
Finding your time zone…
Shared working hours (9:00–18:00)

Chicago to Boulder conversion table

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

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

Best time to call or meet

Both sides are at work from 10:00 AM – 6:00 PM in Chicago (9:00 AM – 5:00 PM in Boulder).

Daylight saving time and the difference

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

  • Oct 16, 2026 – Nov 1, 2026: -1h
  • Nov 1, 2026 – Nov 1, 2026: ±0
  • Nov 1, 2026 – Mar 14, 2027: -1h
  • Mar 14, 2027 – Mar 14, 2027: -2h
  • Mar 14, 2027 – Oct 16, 2027: -1h

Distance

Chicago and Boulder are 1,492 km (927 miles) apart in a straight line.

More conversions

Boulder to ChicagoChicago to New YorkChicago to LondonChicago to Los AngelesChicago to TorontoChicago to São PauloChicago to ParisChicago to BerlinChicago to MoscowChicago to DubaiChicago to New DelhiChicago to BangkokChicago to Singapore
New York to BoulderLondon to BoulderLos Angeles to BoulderToronto to BoulderSão Paulo to BoulderParis to BoulderBerlin to BoulderMoscow to BoulderDubai to BoulderNew Delhi to BoulderBangkok to BoulderSingapore to Boulder

Questions and answers

What is the time difference between Chicago and Boulder?

Boulder is 1 hour behind Chicago.

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

When it is 9:00 AM in Chicago, it is 8:00 AM in Boulder.

When is the best time to call Boulder from Chicago?

Both sides are at work from 10:00 AM – 6:00 PM in Chicago (9:00 AM – 5:00 PM in Boulder).

Does the time difference between Chicago and Boulder change?

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