Compare the plug shapes, voltage and frequency in Barbados and Bhutan, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Barbados, you will need a travel adapter for Bhutan. Barbados uses Type A/Type B plugs, and Bhutan uses Type C/Type D/Type M, so the pin shapes will not fit any wall socket. Voltages differ (115 V at home vs 230 V abroad), so check the label on each device. Most modern dual-voltage chargers handle the swing without a converter, but heating appliances usually do not.
Barbados (home)
Bhutan (destination)
Electrical specifications in Bhutan
More about plugs in Bhutan
In Bhutan, 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 Bhutan 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 Bhutan plug guide