Brasilia Time (brt) is used in Brazil. The IANA timezone identifier is America/Sao_Paulo.

Central Standard Time (cst) is used in USA. The IANA timezone identifier is America/Chicago.

BRT to CST Time Converter

Brasilia Time → Central Standard Time

BRT = UTC-3CST = UTC-5

⚠️ CST is ambiguous — on this page it means Central Standard Time. It also refers to:

BRT → China Standard Time (Beijing) ↗BRT → Cuba Standard Time (Havana) ↗

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

CST (Chicago)

USA · -2h🔔 Public Holiday in 6d — Independence Day

07:00

London

United Kingdom · +4h

13:00

New York

USA · -1h

08:00

Tokyo

Japan · +12h

21:00

Dubai

United Arab Emirates · +7h

16:00

How far apart are BRT (São Paulo) and CST (Chicago)?

BRT (São Paulo) is 2 hours ahead of CST (Chicago). Midday in BRT (São Paulo) lines up with 10:00 in CST (Chicago).

BRT (São Paulo) is in the America/Sao_Paulo timezone. CST (Chicago) is in America/Chicago. The difference is 2 hours.

Daily overlap window

There is a 6-hour window each day where both BRT (São Paulo) and CST (Chicago) are within standard business hours (09:00–17:00).

00:0006:0012:0018:0024:00

BRT (São Paulo)

CST (Chicago)

Overlap (6h)

When to schedule across time zones

Both BRT (São Paulo) and CST (Chicago) are in standard hours simultaneously for 6h per day. 3 recommended slots shown below.

11:00 São Paulo / 09:00 Chicago✓ Both working

12:00 São Paulo / 10:00 Chicago✓ Both working

13:00 São Paulo / 11:00 Chicago✓ Both working

Based on standard 09:00–17:00 working hours in each location's local time.

Upcoming public holidays

⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.

BRT (São Paulo)7 holidays

Jul 9Constitutionalist Revolution of 1932SOON

Sep 7Independence Day

Oct 12Our Lady of Aparecida

Nov 2All Souls' Day

Nov 15Republic Proclamation Day

CST (Chicago)7 holidays

Jul 3Independence DaySOON

Sep 7Labour Day

Oct 12Columbus Day

Oct 12Indigenous Peoples' Day

Nov 11Veterans Day

How to work with BRT (São Paulo) and CST (Chicago) time zones

Working across BRT (São Paulo) (Brazil) and CST (Chicago) (USA) involves a 2-hour gap. The good news: there is a 6-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.

💡 How to schedule across these time zones

✅

11:00–12:00 in BRT (São Paulo) = 09:00–10:00 in CST (Chicago). Both sides are in standard business hours during this window.

✅

12:00–13:00 in BRT (São Paulo) = 10:00–11:00 in CST (Chicago). Both sides are in standard business hours during this window.

✅

13:00–14:00 in BRT (São Paulo) = 11:00–12:00 in CST (Chicago). Both sides are in standard business hours during this window.

DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.

Get the Extension — Free →

Use the time slider above to find the exact equivalent time for any moment in BRT (São Paulo). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

BRT (São Paulo) ↔ CST (Chicago)

6h of business hours overlap daily (09:00–17:00)

BRT (São Paulo)

CST (Chicago)

00:00

22:00-1d

01:00

23:00-1d

02:00

00:00

03:00

01:00

04:00

02:00

05:00

03:00

06:00

04:00

07:00

05:00

08:00

06:00

09:00Working

07:00off

10:00Working

08:00off

11:00Working

09:00Working

12:00Working

10:00Working

13:00Working

11:00Working

14:00Working

12:00Working

15:00Working

13:00Working

16:00Working

14:00Working

17:00

15:00Working

18:00

16:00Working

19:00

17:00

20:00

18:00

21:00

19:00

22:00

20:00

23:00

21:00

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between brt and cst?

Brasilia Time (brt) is UTC-3 and Central Standard Time (cst) is UTC-5. The difference between them is 2 hours.

Where is brt used?

Brasilia Time (brt) is used in Brazil and surrounding regions. The IANA timezone identifier is America/Sao_Paulo.

Where is cst used?

Central Standard Time (cst) is used in USA and surrounding regions. The IANA timezone identifier is America/Chicago. Note: cst is ambiguous and may refer to other timezones.

How do I convert brt to cst?

Use the interactive converter above. Drag the time slider to any brt time and the cst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular BRT conversions

BRT → London BRT → New York BRT → Tokyo BRT → Dubai BRT → Sydney BRT → Paris BRT → Berlin BRT → Singapore BRT → Los Angeles BRT → Toronto

Popular CST conversions

London → CST New York → CST Tokyo → CST Dubai → CST Sydney → CST Paris → CST Berlin → CST Singapore → CST Los Angeles → CST Toronto → CST