Porto to Sanmu time converter

Sanmu is 8 hours ahead of Porto. When it is 9:00 AM in Porto, it is 5:00 PM in Sanmu.

Porto WEST

Tuesday, October 20, 2026

Sanmu JST

Wednesday, October 21, 2026

Porto
Portugal
Tue, Oct 20
WESTUTC+1
Sanmu
Japan
Wed, Oct 21
JSTUTC+9+8h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to Sanmu conversion table

Every hour of today in Porto and the matching time in Sanmu. Light rows are typical working hours (9:00–18:00).

PortoSanmu
12:00 AM8:00 AM
1:00 AM9:00 AM
2:00 AM10:00 AM
3:00 AM11:00 AM
4:00 AM12:00 PM
5:00 AM1:00 PM
6:00 AM2:00 PM
7:00 AM3:00 PM
8:00 AM4:00 PM
9:00 AM5:00 PM
10:00 AM6:00 PM
11:00 AM7:00 PM
12:00 PM8:00 PM
1:00 PM9:00 PM
2:00 PM10:00 PM
3:00 PM11:00 PM
4:00 PM12:00 AM+1 day
5:00 PM1:00 AM+1 day
6:00 PM2:00 AM+1 day
7:00 PM3:00 AM+1 day
8:00 PM4:00 AM+1 day
9:00 PM5:00 AM+1 day
10:00 PM6:00 AM+1 day
11:00 PM7:00 AM+1 day

Best time to call or meet

Both sides are at work from 9:00 AM – 10:00 AM in Porto (5:00 PM – 6:00 PM in Sanmu).

Daylight saving time and the difference

The difference changes during the year because Porto and Sanmu switch clocks on different dates:

  • Oct 20, 2026 – Oct 25, 2026: +8h
  • Oct 25, 2026 – Mar 28, 2027: +9h
  • Mar 28, 2027 – Oct 20, 2027: +8h

Distance

Porto and Sanmu are 10,912 km (6,780 miles) apart in a straight line.

More conversions

Sanmu to PortoPorto to New YorkPorto to LondonPorto to Los AngelesPorto to ChicagoPorto to TorontoPorto to São PauloPorto to ParisPorto to BerlinPorto to MoscowPorto to DubaiPorto to New DelhiPorto to Bangkok
New York to SanmuLondon to SanmuLos Angeles to SanmuChicago to SanmuToronto to SanmuSão Paulo to SanmuParis to SanmuBerlin to SanmuMoscow to SanmuDubai to SanmuNew Delhi to SanmuBangkok to Sanmu

Questions and answers

What is the time difference between Porto and Sanmu?

Sanmu is 8 hours ahead of Porto.

What time is it in Sanmu when it is 9 AM in Porto?

When it is 9:00 AM in Porto, it is 5:00 PM in Sanmu.

When is the best time to call Sanmu from Porto?

Both sides are at work from 9:00 AM – 10:00 AM in Porto (5:00 PM – 6:00 PM in Sanmu).

Does the time difference between Porto and Sanmu change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.