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 Seoul

+12h

São Paulo

BRTSOURCE

Brazil · UTC-03:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Seoul

KST

South Korea · UTC+09:00

HH12

MM00

(next day)00:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

São Paulo

Seoul

12:00 AM

12:00 PM

2:00 AM

2:00 PM

4:00 AM

4:00 PM

6:00 AM

6:00 PM

8:00 AM

8:00 PM

10:00 AM

10:00 PM

12:00 PM

12:00 AM+1

2:00 PM

2:00 AM+1

4:00 PM

4:00 AM+1

6:00 PM

6:00 AM+1

8:00 PM

8:00 AM+1

10:00 PM

10:00 AM+1

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

BRT and KST on the World Map

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

BRT Zone

→

KST 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

KST – Korea Standard Time

UTC+09:00

Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.

Countries in KST

South KoreaNorth Korea

Major Cities in KST

SeoulBusanIncheonDaeguDaejeonPyongyang

Key Facts about KST

•South Korea does not observe daylight saving time.
•Seoul is home to Samsung, LG, and Hyundai headquarters.
•KST is the same offset as JST (UTC+09:00).

Daylight Saving:No – UTC+09:00 year-round

Learn more about KST 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 Seoul

Wikipedia

Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.

Population:9.7 million

Metro:25.5 million

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

Currency:KRW (₩)

Stock Exchange:KRX (Korea Exchange)

Key Landmarks

Gyeongbokgung PalaceN Seoul TowerBukchon Hanok VillageDongdaemun Design PlazaCheonggyecheon Stream

Did You Know?

Seoul has the fastest average internet speed in the world.

Learn more about KST timezone →

Comparing Time Zones: São Paulo and Seoul

São Paulo runs on Brasilia Standard Time (BRT) at UTC-03:00. Seoul runs on Korean Standard Time (KST) at UTC+09:00. That puts São Paulo 12 hours ahead of Seoul — a difference of +12h at the current offsets.

In practice, when it is 9:00 AM in São Paulo it is 9:00 PM in Seoul. Midnight in São Paulo is 12:00 PM in Seoul. Neither zone observes daylight saving time, so the offset between them stays constant all year.

São Paulo to Seoul time conversion table

São Paulo (BRT)	Seoul (KST)	Day
12:00 AM	12:00 PM	same day
6:00 AM	6:00 PM	same day
7:00 AM	7:00 PM	same day
8:00 AM	8:00 PM	same day
9:00 AM	9:00 PM	same day
12:00 PM	12:00 AM	next day
3:00 PM	3:00 AM	next day
5:00 PM	5:00 AM	next day
6:00 PM	6:00 AM	next day
9:00 PM	9:00 AM	next day

Why people convert São Paulo to Seoul time

Scheduling a call from São Paulo to Seoul: a 10:00 AM start in São Paulo lands at 10:00 PM in Seoul, so you can confirm the slot without doing the arithmetic yourself.
Handling a +12h gap: São Paulo and Seoul have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Seoul is 9:00 PM in São Paulo.
Keeping family and friends in sync: knowing that 8:00 PM in São Paulo is 8:00 AM in Seoul makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM BRT" is unambiguous; "3 PM" across a +12h gap is not.
With a +12h gap there is no shared 9-to-5 window, so alternate the early start: one week São Paulo takes the early slot, the next week Seoul does.

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 KST (Korea Standard Time)

Korea Standard Time (KST) is the time zone used in South Korea. It shares the same UTC offset as Japan Standard Time but is a distinct time zone. South Korea does not observe daylight saving time. Seoul, the capital, is a major global tech and business hub.

Best time to call between São Paulo and Seoul

With a +12h offset there is no overlap inside a normal 9 AM – 5 PM day. Seoul opens at 9:00 AM KST, which is 9:00 PM in São Paulo, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

São Paulo and Seoul have no shared working hours because of the +12h gap. Teams need to alternate early starts or rely on asynchronous handovers.

São Paulo is 12 hours ahead of Seoul (BRT UTC-03:00 → KST UTC+09:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

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 Seoul?

São Paulo (BRT, UTC-03:00) is 12 hours ahead of Seoul (KST, UTC+09:00). The gap is currently +12h.

How do I convert São Paulo time to Seoul time?

Add +12h to São Paulo local time. For example, 9:00 AM in São Paulo is 9:00 PM in Seoul.

What time is it in Seoul right now?

Seoul uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +12h offset from São Paulo.

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

There is no shared working-hours window because of the +12h gap. The closest option is 1:00 PM in São Paulo, which is 1:00 AM in Seoul.

Which is ahead, São Paulo or Seoul?

São Paulo is 12 hours ahead of Seoul. When it is 12:00 PM in São Paulo it is 12:00 AM in Seoul.

Do São Paulo and Seoul use different time zones?

São Paulo (Brazil) uses BRT at UTC-03:00, while Seoul (South Korea) uses KST at UTC+09:00. The IANA identifiers are America/Sao_Paulo and Asia/Seoul.

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

Neither zone observes daylight saving time, so the +12h offset between São Paulo and Seoul is fixed all year.

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 Seoul?

Sometimes. The +12h gap is large enough that 8:00 PM or later in São Paulo already falls on the next day in Seoul.

What is the time difference between São Paulo and Seoul?

Seoul is +12h 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 Seoul in?

Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.

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 Seoul?

Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.

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

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 Seoul works 9:00 AM - 6:00 PM KST (+12h difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in São Paulo and Seoul?

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

How do São Paulo and Seoul compare in size?

São Paulo has a population of approximately 12.4 million (metro: 22.4 million), while Seoul has approximately 9.7 million (metro: 25.5 million).

What are the major landmarks in São Paulo and Seoul?

São Paulo is known for Paulista Avenue, Ibirapuera Park, São Paulo Cathedral. Seoul is famous for Gyeongbokgung Palace, N Seoul Tower, Bukchon Hanok Village.

Do São Paulo and Seoul have stock exchanges?

Yes. São Paulo has the B3 (Brasil Bolsa Balcão) and Seoul has the KRX (Korea Exchange). The +12h time difference affects trading hour overlaps between these exchanges.