Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

Chicago to São Paulo

+2h

Chicago

CDTSOURCE

USA · UTC-05:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

São Paulo

BRT

Brazil · UTC-03:00

HH02

MM00

14:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Chicago

São Paulo

12:00 AM

2:00 AM

4:00 AM

6:00 AM

8:00 AM

10:00 AM

12:00 PM

2:00 PM

4:00 PM

6:00 PM

8:00 PM

10:00 PM

12:00 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

CDT and BRT on the World Map

The map below highlights the CDT (Central Standard Time) and BRT (Brasilia Time) timezone regions across the globe.

CDT Zone

→

BRT Zone

Explore all world timezones interactively →

CST – Central Standard Time

UTC-06:00

Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.

Countries in CST

United States (Central)Canada (Manitoba, Saskatchewan)MexicoGuatemalaHondurasEl SalvadorCosta RicaNicaraguaBelize

Major Cities in CST

ChicagoHoustonDallasSan AntonioMexico CityAustinWinnipegMemphisMilwaukeeNashvilleKansas CityNew OrleansMinneapolisGuatemala City

Key Facts about CST

•CST covers 20 US states fully or partially.
•Chicago and Houston are the two largest cities in the Central Time Zone.
•Mexico City, one of the world's most populous cities, operates on CST.
•CST is 1 hour behind EST and 2 hours ahead of PST.

Daylight Saving:Yes – switches to CDT

Learn more about CST on Wikipedia

BRT – Brasilia Time

UTC-03:00

Brasilia Time (BRT) is the time zone for eastern Brazil, 3 hours behind UTC.

Countries in BRT

Brazil (eastern)

Major Cities in BRT

São PauloRio de JaneiroBrasíliaBelo HorizonteSalvadorFortalezaRecifeCuritiba

Key Facts about BRT

•Brazil abolished daylight saving time in 2019.
•São Paulo is the largest city in the Southern Hemisphere.
•BRT is 2 hours ahead of EST.
•Brazil spans four different time zones.
•The B3 stock exchange in São Paulo operates on BRT.

Daylight Saving:No – UTC-03:00 year-round

Learn more about BRT on Wikipedia

About Chicago

Wikipedia

Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.

Population:2.7 million

Metro:9.5 million

Business Hours:8:00 AM - 5:00 PM CST

Currency:USD ($)

Stock Exchange:CME (Chicago Mercantile Exchange), CBOE

Key Landmarks

Willis TowerMillennium ParkCloud Gate (The Bean)Navy PierArt Institute of Chicago

Did You Know?

The Chicago Board of Trade is the world's oldest futures and options exchange.

Learn more about CDT timezone →

About São Paulo

Wikipedia

São Paulo operates on Brasília Time (BRT), UTC-3. As South America's largest financial center, São Paulo's B3 exchange is the Americas' second-largest.

Population:12.4 million

Metro:22.4 million

Business Hours:9:00 AM - 6:00 PM BRT

Currency:BRL (R$)

Stock Exchange:B3 (Brasil Bolsa Balcão)

Key Landmarks

Paulista AvenueIbirapuera ParkSão Paulo CathedralMASPPinacoteca

Did You Know?

The city has more helicopters than any other city in the world due to traffic congestion.

Learn more about BRT timezone →

Chicago to São Paulo Time Difference – Complete Guide

Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. São Paulo runs on Brasilia Standard Time (BRT) at UTC-03:00. That puts Chicago 2 hours ahead of São Paulo — a difference of +2h at the current offsets.

In practice, when it is 9:00 AM in Chicago it is 11:00 AM in São Paulo. Midnight in Chicago is 2:00 AM in São Paulo.Chicago observes daylight saving time while São Paulo does not, so the gap narrows or widens by an hour part of the year.

Chicago to São Paulo time conversion table

Chicago (CDT)	São Paulo (BRT)	Day
12:00 AM	2:00 AM	same day
6:00 AM	8:00 AM	same day
7:00 AM	9:00 AM	same day
8:00 AM	10:00 AM	same day
9:00 AM	11:00 AM	same day
12:00 PM	2:00 PM	same day
3:00 PM	5:00 PM	same day
5:00 PM	7:00 PM	same day
6:00 PM	8:00 PM	same day
9:00 PM	11:00 PM	same day

Why people convert Chicago to São Paulo time

Scheduling a call from Chicago to São Paulo: a 10:00 AM start in Chicago lands at 12:00 PM in São Paulo, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Chicago and São Paulo are inside the 9-to-5 working day between 9:00 AM and 3:00 PM CDT time (11:00 AM–5:00 PM BRT). That is roughly 6 hours of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in Chicago is 10:00 PM in São Paulo makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM CDT" is unambiguous; "3 PM" across a +2h gap is not.
Block 9:00 AM–3:00 PM CDT as the recurring meeting window if you work primarily from Chicago and need São Paulo colleagues present.
Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +2h gap.

About CST (Central Standard Time)

Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.

About BRT (Brasilia Time)

Brasilia Time (BRT) is the standard time in the most populous regions of Brazil, including São Paulo, Rio de Janeiro, and the capital Brasília. Brazil abolished daylight saving time in 2019, so BRT is now observed year-round in these regions. Brazil spans four time zones in total.

Best time to call between Chicago and São Paulo

Both Chicago and São Paulo sit inside the 9 AM – 5 PM working day between 9:00 AM–3:00 PM CDT, which is 11:00 AM–5:00 PM BRT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Chicago and São Paulo share 6 hours of working-hours overlap (9:00 AM–3:00 PM CDT), so scheduling a live meeting is straightforward.

Chicago is 2 hours ahead of São Paulo (CDT UTC-05:00 → BRT UTC-03:00). The shared working window is 9:00 AM–3:00 PM CDT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Chicago

☀ Currently in DST

Standard: UTC-06:00 · DST: UTC-05:00

Clocks fall back on Sun, Nov 1, 2026

São Paulo

Does not observe DST

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Chicago and São Paulo?

Chicago (CDT, UTC-05:00) is 2 hours ahead of São Paulo (BRT, UTC-03:00). The gap is currently +2h.

How do I convert Chicago time to São Paulo time?

Add +2h to Chicago local time. For example, 9:00 AM in Chicago is 11:00 AM in São Paulo.

What time is it in São Paulo right now?

São Paulo uses BRT at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h offset from Chicago.

What is the best time to call São Paulo from Chicago?

Call between 9:00 AM and 3:00 PM CDT — that maps to 11:00 AM–5:00 PM BRT and keeps both parties inside the working day.

Which is ahead, Chicago or São Paulo?

Chicago is 2 hours ahead of São Paulo. When it is 12:00 PM in Chicago it is 2:00 PM in São Paulo.

Do Chicago and São Paulo use different time zones?

Chicago (USA) uses CDT at UTC-05:00, while São Paulo (Brazil) uses BRT at UTC-03:00. The IANA identifiers are America/Chicago and America/Sao_Paulo.

Does daylight saving time affect the Chicago–São Paulo difference?

Yes at the moment: Chicago is on daylight saving time and São Paulo is not, so the +2h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Chicago's time zone?

CDT also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.

Which countries use CDT, Chicago's zone?

CDT is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.

Is there a day difference between Chicago and São Paulo?

Not normally. The +2h gap only pushes the date over for late-evening times.

What is the time difference between Chicago and São Paulo?

São Paulo is +2h from Chicago.

What timezone is Chicago in?

Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.

What timezone is São Paulo in?

São Paulo operates on Brasília Time (BRT), UTC-3. As South America's largest financial center, São Paulo's B3 exchange is the Americas' second-largest.

What are the business hours in Chicago?

Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.

What are the business hours in São Paulo?

Standard business hours in São Paulo are 9:00 AM - 6:00 PM BRT.

What is the best time to schedule a call between Chicago and São Paulo?

The best overlap for a call is when both cities are in business hours. Chicago works 8:00 AM - 5:00 PM CST and São Paulo works 9:00 AM - 6:00 PM BRT (+2h difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Chicago and São Paulo?

Chicago uses USD ($) while São Paulo uses BRL (R$). Check current exchange rates when planning travel or business between these cities.

How do Chicago and São Paulo compare in size?

Chicago has a population of approximately 2.7 million (metro: 9.5 million), while São Paulo has approximately 12.4 million (metro: 22.4 million).

What are the major landmarks in Chicago and São Paulo?

Chicago is known for Willis Tower, Millennium Park, Cloud Gate (The Bean). São Paulo is famous for Paulista Avenue, Ibirapuera Park, São Paulo Cathedral.

Do Chicago and São Paulo have stock exchanges?

Yes. Chicago has the CME (Chicago Mercantile Exchange), CBOE and São Paulo has the B3 (Brasil Bolsa Balcão). The +2h time difference affects trading hour overlaps between these exchanges.