Compare the plug shapes, voltage and frequency in Philippines and Sri Lanka, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Philippines, you will need a travel adapter for Sri Lanka. Philippines uses Type A/Type B/Type C plugs, and Sri Lanka uses Type G, so the pin shapes will not fit any wall socket. The mains frequency is also different (60 Hz vs 50 Hz). This rarely matters for electronics but can affect motor-driven devices like clocks and shavers.
Frequency differs (60 Hz vs 50 Hz). Rarely an issue for most electronics, but can affect motor-driven devices like clocks and shavers.
Philippines (home)
Sri Lanka (destination)
Electrical specifications in Sri Lanka
Voltage
Frequency
More about plugs in Sri Lanka
In Sri Lanka, the standard power plug is Type G. The country runs on 230 volts at 50 Hz. That means every wall socket in Sri Lanka is the same shape — Type G, and your plug needs to physically match the socket to fit.
Full Sri Lanka plug guide