Porto to Koga time converter

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

Porto WEST

Monday, October 19, 2026

Koga JST

Tuesday, October 20, 2026

Porto
Portugal
Mon, Oct 19
WESTUTC+1
Koga
Japan
Tue, Oct 20
JSTUTC+9+8h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to Koga conversion table

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

PortoKoga
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 Koga).

Daylight saving time and the difference

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

  • Oct 19, 2026 – Oct 25, 2026: +8h
  • Oct 25, 2026 – Mar 28, 2027: +9h
  • Mar 28, 2027 – Oct 19, 2027: +8h

Distance

Porto and Koga are 10,830 km (6,729 miles) apart in a straight line.

More conversions

Koga 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 KogaLondon to KogaLos Angeles to KogaChicago to KogaToronto to KogaSão Paulo to KogaParis to KogaBerlin to KogaMoscow to KogaDubai to KogaNew Delhi to KogaBangkok to Koga

Questions and answers

What is the time difference between Porto and Koga?

Koga is 8 hours ahead of Porto.

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

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

When is the best time to call Koga from Porto?

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

Does the time difference between Porto and Koga change?

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