Compare the plug shapes, voltage and frequency in Oman and Greece, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Oman, you will need a travel adapter for Greece. Oman uses Type G plugs, and Greece uses Type C/Type F, so the pin shapes will not fit any wall socket.
Oman (home)
Greece (destination)
Electrical specifications in Greece
Voltage
Frequency
More about plugs in Greece
In Greece, the standard power plug is Type C and Type F. The country runs on 230 volts at 50 Hz. That means wall sockets in Greece can be one of 2 different shapes — Type C, Type F, and your plug needs to physically match the socket to fit.
Full Greece plug guide