Compatibility summary
Your Philippines plug may fit in Guam outlets, as both use at least one common plug type. Voltage differs by more than 20% — a voltage converter may be needed for some appliances.
Plug comparison
Philippines plug types: A B C
Guam plug types: A B
Both countries share at least one plug type (A B C and A B), so some plugs may work without an adapter. Check your appliance.
Voltage comparison
Philippines: 220V, 60Hz
Guam: 110V, 60Hz
Voltage converter recommended (Philippines 220V vs Guam 110V).