No overlap — one side will join outside working hours
BRT (São Paulo)
KST (Seoul)
00:00
12:00Working
01:00
13:00Working
02:00
14:00Working
03:00
15:00Working
04:00
16:00Working
05:00
17:00
06:00
18:00
07:00
19:00
08:00
20:00
09:00Working
21:00off
10:00Working
22:00off
11:00Working
23:00off
12:00Working
00:00+1doff
13:00Working
01:00+1doff
14:00Working
02:00+1doff
15:00Working
03:00+1doff
16:00Working
04:00+1doff
17:00
05:00+1d
18:00
06:00+1d
19:00
07:00+1d
20:00
08:00+1d
21:00
09:00+1dWorking
22:00
10:00+1dWorking
23:00
11:00+1dWorking
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between brt and kst?
Brasilia Time (brt) is UTC-3 and Korea Standard Time (kst) is UTC+9. The difference between them is 12 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 kst used?
Korea Standard Time (kst) is used in South Korea and surrounding regions. The IANA timezone identifier is Asia/Seoul.
How do I convert brt to kst?
Use the interactive converter above. Drag the time slider to any brt time and the kst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
BRT (São Paulo) is 12 hours behind KST (Seoul). Midday in BRT (São Paulo) lines up with 00:00 in KST (Seoul).
BRT (São Paulo) runs on America/Sao_Paulo; KST (Seoul) runs on Asia/Seoul. Together they are 12 hours apart.
Business hours comparison
There is no business hours overlap between BRT (São Paulo) and KST (Seoul) during standard working hours (9:00–17:00). Meetings would require one party to work outside normal hours.
Best times to schedule a meeting
BRT (São Paulo) and KST (Seoul) have no shared working window. These slots minimize out-of-hours disruption for both sides.
04:00 São Paulo / 16:00 Seoul⚡ One side off-hours
⚠️ 5h before working hours in São Paulo
09:00 São Paulo / 21:00 Seoul⚡ One side off-hours
⚠️ 5h after working hours in Seoul
16:00 São Paulo / 04:00 Seoul⚡ One side off-hours
⚠️ 5h before working hours in Seoul
Working hours defined as 09:00–17:00 local time for each location.
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
KST (Seoul)7 holidays
Aug 15Liberation Day
Sep 24Chuseok
Sep 25Chuseok
Sep 26Chuseok
Oct 3National Foundation Day
How to work with BRT (São Paulo) and KST (Seoul) time zones
Teams in BRT (São Paulo) (Brazil) and KST (Seoul) (South Korea) deal with a 12-hour gap that pushes their working days apart. Real-time meetings always require someone to stretch outside the standard 9–5.
💡 How to schedule across these time zones
⚡
A 04:00 meeting in BRT (São Paulo) means 16:00 in KST (Seoul) (5h before working hours in São Paulo).
⚡
A 09:00 meeting in BRT (São Paulo) means 21:00 in KST (Seoul) (5h after working hours in Seoul).
⚡
A 16:00 meeting in BRT (São Paulo) means 04:00 in KST (Seoul) (5h before working hours in Seoul).
Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.
Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.
Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am BRT (São Paulo)".
