Compare the plug shapes, voltage and frequency in Antigua and Barbuda and Nepal, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Antigua and Barbuda, you will need a travel adapter for Nepal. Antigua and Barbuda uses Type A/Type B plugs, and Nepal uses Type C/Type D/Type M, 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.
Antigua and Barbuda (home)
Nepal (destination)
Electrical specifications in Nepal
More about plugs in Nepal
In Nepal, the standard power plug is Type C and Type D and Type M. The country runs on 230 volts at 50 Hz. That means wall sockets in Nepal can be one of 3 different shapes — Type C, Type D, Type M, and your plug needs to physically match the socket to fit.
Full Nepal plug guide