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).

São Paulo to Chicago

-2h

São Paulo

BRTSOURCE

Brazil · UTC-03:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Chicago

CDT

USA · UTC-05:00☀ DST active

HH10

MM00

10:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

São Paulo

Chicago

12:00 AM

10:00 PM-1

2:00 AM

12:00 AM

4:00 AM

2:00 AM

6:00 AM

4:00 AM

8:00 AM

6:00 AM

10:00 AM

8:00 AM

12:00 PM

10:00 AM

2:00 PM

12:00 PM

4:00 PM

2:00 PM

6:00 PM

4:00 PM

8:00 PM

6:00 PM

10:00 PM

8:00 PM

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

BRT and CDT on the World Map

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

BRT Zone

→

CDT Zone

Explore all world timezones interactively →

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

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

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 →

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 →

Everything You Need to Know About São Paulo and Chicago Time

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

In practice, when it is 9:00 AM in São Paulo it is 7:00 AM in Chicago. Midnight in São Paulo is 10:00 PM in Chicago.Chicago observes daylight saving time while São Paulo does not, so the gap narrows or widens by an hour part of the year.

São Paulo to Chicago time conversion table

São Paulo (BRT)	Chicago (CDT)	Day
12:00 AM	10:00 PM	previous day
6:00 AM	4:00 AM	same day
7:00 AM	5:00 AM	same day
8:00 AM	6:00 AM	same day
9:00 AM	7:00 AM	same day
12:00 PM	10:00 AM	same day
3:00 PM	1:00 PM	same day
5:00 PM	3:00 PM	same day
6:00 PM	4:00 PM	same day
9:00 PM	7:00 PM	same day

Why people convert São Paulo to Chicago time

Scheduling a call from São Paulo to Chicago: a 10:00 AM start in São Paulo lands at 8:00 AM in Chicago, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both São Paulo and Chicago are inside the 9-to-5 working day between 11:00 AM and 5:00 PM BRT time (9:00 AM–3:00 PM CDT). That is roughly 6 hours of usable overlap.
Coordinating a São Paulo-based team with Chicago contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM BRT" is unambiguous; "3 PM" across a -2h gap is not.
Block 11:00 AM–5:00 PM BRT as the recurring meeting window if you work primarily from São Paulo and need Chicago colleagues present.
Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.

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.

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.

Best time to call between São Paulo and Chicago

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

Business hours overlap

São Paulo and Chicago share 6 hours of working-hours overlap (11:00 AM–5:00 PM BRT), so scheduling a live meeting is straightforward.

São Paulo is 2 hours behind Chicago (BRT UTC-03:00 → CDT UTC-05:00). The shared working window is 11:00 AM–5:00 PM BRT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

São Paulo

Does not observe DST

Chicago

☀ Currently in DST

Standard: UTC-06:00 · DST: UTC-05:00

Clocks fall back on Sun, Nov 1, 2026

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 São Paulo and Chicago?

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

How do I convert São Paulo time to Chicago time?

Add -2h to São Paulo local time. For example, 9:00 AM in São Paulo is 7:00 AM in Chicago.

What time is it in Chicago right now?

Chicago uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h offset from São Paulo.

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

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

Which is behind, São Paulo or Chicago?

São Paulo is 2 hours behind Chicago. When it is 12:00 PM in São Paulo it is 10:00 AM in Chicago.

Do São Paulo and Chicago use different time zones?

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

Does daylight saving time affect the São Paulo–Chicago 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 São Paulo's time zone?

BRT also covers São Paulo, Rio de Janeiro, Brasília, Belo Horizonte, Salvador, Fortaleza, Recife, Curitiba.

Which countries use BRT, São Paulo's zone?

BRT is used in Brazil (eastern).

Is there a day difference between São Paulo and Chicago?

Not normally. The -2h gap only pushes the date over the previous day.

What is the time difference between São Paulo and Chicago?

Chicago is -2h from São Paulo.

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 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 are the business hours in São Paulo?

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

What are the business hours in Chicago?

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

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

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

What currencies are used in São Paulo and Chicago?

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

How do São Paulo and Chicago compare in size?

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

What are the major landmarks in São Paulo and Chicago?

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

Do São Paulo and Chicago have stock exchanges?

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