Will your power adapter operate abroad?

The best way to find out is to directly check what's printed on the power supply. These usually feature a sticker or something similar that says something about the voltages the device can operate on (e.g. "120 Volts", "120V", "~120V" or similar). Modern power supplies often operate on a wide range of voltages.

A range of e.g. "110-240V" is not uncommon, if that's the case, all you need to bring along is a matching cable or adapter so you can plug it into the local socket format (a hassle on its own).

Flag Country Power Voltage and Frequency
Afghanistan 220 V - 50 Hz (plugs: C, F)
Albania 230 V - 50 Hz (plugs: C, F)
Algeria 230 V - 50 Hz (plugs: C, F)
American Samoa 120 V - 60 Hz (plugs: A, B, F, I)
Andorra 230 V - 50 Hz (plugs: C, F)
Angola 220 V - 50 Hz (plugs: C)
Anguilla 110 V - 60 Hz (plugs: A, B)
Antigua and Barbuda 230 V - 60 Hz (plugs: A, B)
Argentina 220 V - 50 Hz (plugs: I)
Armenia 230 V - 50 Hz (plugs: C, F)
Aruba 120 V - 60 Hz (plugs: A, B, F)
Australia 230 V - 50 Hz (plugs: I)
Austria 230 V - 50 Hz (plugs: C, F)
Azerbaijan 220 V - 50 Hz (plugs: C, F)
Bahamas 120 V - 60 Hz (plugs: A, B)
Bahrain 230 V - 50 Hz (plugs: G)
Bangladesh 220 V - 50 Hz (plugs: A, C, D, G, K)
Barbados 115 V - 50 Hz (plugs: A, B)
Belarus 220 V - 50 Hz (plugs: C, F)
Belgium 230 V - 50 Hz (plugs: C, E)
Belize 110 V / 220 V - 60 Hz (plugs: A, B, G)
Benin 220 V - 50 Hz (plugs: C, E)
Bermuda 120 V - 60 Hz (plugs: A, B)
Bhutan 230 V - 50 Hz (plugs: C, D, G)
Bolivia 230 V - 50 Hz (plugs: A, C)
Bosnia and Herzegovina 230 V - 50 Hz (plugs: C, F)
Botswana 230 V - 50 Hz (plugs: D, G)
Brazil 127 V / 220 V - 60 Hz (plugs: C, N)
British Indian Ocean Territory
British Virgin Islands 110 V - 60 Hz (plugs: A, B)
Brunei 240 V - 50 Hz (plugs: G)
Bulgaria 230 V - 50 Hz (plugs: C, F)
Burkina Faso 220 V - 50 Hz (plugs: C, E)
Burundi 220 V - 50 Hz (plugs: C, E)
Cambodia 230 V - 50 Hz (plugs: A, C, G)
Cameroon 220 V - 50 Hz (plugs: C, E)
Canada 120 V - 60 Hz (plugs: A, B)
Cape Verde 230 V - 50 Hz (plugs: C, F)
Cayman Islands 120 V - 60 Hz (plugs: A, B)
Central African Republic 220 V - 50 Hz (plugs: C, E)
Chad 220 V - 50 Hz (plugs: C, D, E, F)
Chile 220 V - 50 Hz (plugs: C, L)
China 220 V - 50 Hz (plugs: A, C, I)
Christmas Island 230 V - 50 Hz (plugs: I)
Cocos Islands 230 V - 50 Hz (plugs: I)
Colombia 110 V - 60 Hz (plugs: A, B)
Comoros 220 V - 50 Hz (plugs: C, E)
Cook Islands 240 V - 50 Hz (plugs: I)
Costa Rica 120 V - 60 Hz (plugs: A, B)
Croatia 230 V - 50 Hz (plugs: C, F)
Cuba 110 V / 220 V - 60 Hz (plugs: A, B, C, L)
Cyprus 230 V - 50 Hz (plugs: G)
Czechia 230 V - 50 Hz (plugs: C, E)
Democratic Republic of the Congo 220 V - 50 Hz (plugs: C, D, E)
Denmark 230 V - 50 Hz (plugs: C, E, F, K)
Djibouti 220 V - 50 Hz (plugs: C, E)
Dominica 230 V - 50 Hz (plugs: D, G)
Dominican Republic 120 V - 60 Hz (plugs: A, B, C)
East Timor 220 V - 50 Hz (plugs: C, E, F, I)
Ecuador 120 V - 60 Hz (plugs: A, B)
Egypt 220 V - 50 Hz (plugs: C, F)
El Salvador 120 V - 60 Hz (plugs: A, B)
Equatorial Guinea 220 V - 50 Hz (plugs: C, E)
Eritrea 230 V - 50 Hz (plugs: C, L)
Estonia 230 V - 50 Hz (plugs: C, F)
Ethiopia 220 V - 50 Hz (plugs: C, F)
Falkland Islands 240 V - 50 Hz (plugs: G)
Faroe Islands 230 V - 50 Hz (plugs: C, E, F, K)
Fiji 240 V - 50 Hz (plugs: I)
Finland 230 V - 50 Hz (plugs: C, F)
France 230 V - 50 Hz (plugs: C, E)
French Guiana 220 V - 50 Hz (plugs: C, D, E)
French Polynesia
Gabon 220 V - 50 Hz (plugs: C)
Gambia 230 V - 50 Hz (plugs: G)
Georgia 220 V - 50 Hz (plugs: C, F)
Germany 230 V - 50 Hz (plugs: C, F)
Ghana 230 V - 50 Hz (plugs: D, G)
Gibraltar 230 V - 50 Hz (plugs: G)
Greece 230 V - 50 Hz (plugs: C, F)
Greenland 230 V - 50 Hz (plugs: C, E, F, K)
Grenada 230 V - 50 Hz (plugs: G)
Guadeloupe 230 V - 50 Hz (plugs: C, E)
Guam 110 V - 60 Hz (plugs: A, B)
Guatemala 120 V - 60 Hz (plugs: A, B)
Guernsey 230 V - 50 Hz (plugs: C, G)
Guinea 220 V - 50 Hz (plugs: C, F, K)
Guinea-Bissau 220 V - 50 Hz (plugs: C)
Guyana 120 V / 240 V - 60 Hz (plugs: A, B, D, G)
Haiti 110 V - 60 Hz (plugs: A, B)
Honduras 120 V - 60 Hz (plugs: A, B)
Hong Kong 220 V - 50 Hz (plugs: G)
Hungary 230 V - 50 Hz (plugs: C, F)
Iceland 230 V - 50 Hz (plugs: C, F)
India 230 V - 50 Hz (plugs: C, D, M)
Indonesia 230 V - 50 Hz (plugs: C, F)
Iran 230 V - 50 Hz (plugs: C, F)
Iraq 230 V - 50 Hz (plugs: C, D, G)
Ireland 230 V - 50 Hz (plugs: G)
Isle of Man 230 V - 50 Hz (plugs: C, G)
Israel 230 V - 50 Hz (plugs: C, H)
Italy 230 V - 50 Hz (plugs: C, F, L)
Ivory Coast 220 V - 50 Hz (plugs: C, E)
Jamaica 110 V - 50 Hz (plugs: A, B)
Japan 100 V - 50 Hz / 60 Hz (plugs: A, B)
Jersey 230 V - 50 Hz (plugs: C, G)
Jordan 230 V - 50 Hz (plugs: C, D, F, G, J)
Kazakhstan 220 V - 50 Hz (plugs: C, F)
Kenya 240 V - 50 Hz (plugs: G)
Kiribati 240 V - 50 Hz (plugs: I)
Kosovo 230 V - 50 Hz (plugs: C, F)
Kuwait 240 V - 50 Hz (plugs: G)
Kyrgyzstan 220 V - 50 Hz (plugs: C, F)
Laos 230 V - 50 Hz (plugs: A, B, C, E, F)
Latvia 230 V - 50 Hz (plugs: C, F)
Lebanon 230 V - 50 Hz (plugs: C, D, G)
Lesotho 220 V - 50 Hz (plugs: M)
Liberia 120 V - 60 Hz (plugs: A, B)
Libya 230 V - 50 Hz (plugs: C, L)
Liechtenstein 230 V - 50 Hz (plugs: C, J)
Lithuania 230 V - 50 Hz (plugs: C, F)
Luxembourg 230 V - 50 Hz (plugs: C, F)
Macao
Macedonia 230 V - 50 Hz (plugs: C, F)
Madagascar 220 V - 50 Hz (plugs: C, E)
Malawi 230 V - 50 Hz (plugs: G)
Malaysia 240 V - 50 Hz (plugs: G)
Maldives 230 V - 50 Hz (plugs: C, D, G, J, K, L)
Mali 220 V - 50 Hz (plugs: C, E)
Malta 230 V - 50 Hz (plugs: G)
Marshall Islands 120 V - 60 Hz (plugs: A, B)
Martinique 220 V - 50 Hz (plugs: C, D, E)
Mauritania 220 V - 50 Hz (plugs: C)
Mauritius 230 V - 50 Hz (plugs: C, G)
Mayotte 230 V - 50 Hz (plugs: C, E)
Mexico 120 V - 60 Hz (plugs: A, B)
Micronesia 120 V - 60 Hz (plugs: A, B)
Moldova 230 V - 50 Hz (plugs: C, F)
Monaco 230 V - 50 Hz (plugs: C, E, F)
Mongolia 230 V - 50 Hz (plugs: C, E)
Montenegro 230 V - 50 Hz (plugs: C, F)
Montserrat 230 V - 60 Hz (plugs: A, B)
Morocco 220 V - 50 Hz (plugs: C, E)
Mozambique 220 V - 50 Hz (plugs: C, F, M)
Myanmar 230 V - 50 Hz (plugs: A, C, D, G, I)
Namibia 220 V - 50 Hz (plugs: D, M)
Nauru 240 V - 50 Hz (plugs: I)
Nepal 230 V - 50 Hz (plugs: C, D, M)
Netherlands 230 V - 50 Hz (plugs: C, F)
Netherlands Antilles
New Caledonia 220 V - 50 Hz (plugs: C, F)
New Zealand 230 V - 50 Hz (plugs: I)
Nicaragua 120 V - 60 Hz (plugs: A, B)
Niger 220 V - 50 Hz (plugs: C, D, E, F)
Nigeria 230 V - 50 Hz (plugs: D, G)
Niue 230 V - 50 Hz (plugs: I)
Norfolk Island 230 V - 50 Hz (plugs: I)
North Korea 220 V - 50 Hz (plugs: C)
Northern Mariana Islands
Norway 230 V - 50 Hz (plugs: C, F)
Oman 240 V - 50 Hz (plugs: G)
Pakistan 230 V - 50 Hz (plugs: C, D)
Palau 120 V - 60 Hz (plugs: A, B)
Palestinian Territory
Panama 120 V - 60 Hz (plugs: A, B)
Papua New Guinea 240 V - 50 Hz (plugs: I)
Paraguay 220 V - 50 Hz (plugs: C)
Peru 220 V - 60 Hz (plugs: A, C)
Philippines 220 V - 60 Hz (plugs: A, B, C)
Pitcairn 230 V - 50 Hz (plugs: I)
Poland 230 V - 50 Hz (plugs: C, E)
Portugal 230 V - 50 Hz (plugs: C, F)
Puerto Rico 120 V - 60 Hz (plugs: A, B)
Qatar 240 V - 50 Hz (plugs: G)
Republic of the Congo 230 V - 50 Hz (plugs: C, E)
Reunion 230 V - 50 Hz (plugs: C, E)
Romania 230 V - 50 Hz (plugs: C, F)
Russia 220 V - 50 Hz (plugs: C, F)
Rwanda 230 V - 50 Hz (plugs: C, J)
Saint Barthelemy 230 V - 60 Hz (plugs: C, E)
Saint Helena 230 V - 50 Hz (plugs: G)
Saint Kitts and Nevis 230 V - 60 Hz (plugs: D, G)
Saint Lucia 230 V - 50 Hz (plugs: G)
Saint Martin 220 V - 60 Hz (plugs: C, E)
Saint Pierre and Miquelon
Saint Vincent and the Grenadines 110 V / 230 V - 50 Hz (plugs: A, B, G)
Samoa 230 V - 50 Hz (plugs: I)
San Marino 230 V - 50 Hz (plugs: C, F, L)
Sao Tome and Principe 230 V - 50 Hz (plugs: C, F)
Saudi Arabia 230 V - 60 Hz (plugs: G)
Senegal 230 V - 50 Hz (plugs: C, D, E, K)
Serbia 230 V - 50 Hz (plugs: C, F)
Seychelles 240 V - 50 Hz (plugs: G)
Sierra Leone 230 V - 50 Hz (plugs: D, G)
Singapore 230 V - 50 Hz (plugs: G)
Slovakia 230 V - 50 Hz (plugs: C, E)
Slovenia 230 V - 50 Hz (plugs: C, F)
Solomon Islands 230 V - 50 Hz (plugs: G, I)
Somalia 220 V - 50 Hz (plugs: C)
South Africa 230 V - 50 Hz (plugs: C, M, N)
South Georgia and the South Sandwich Islands
South Korea 220 V - 60 Hz (plugs: F)
Spain 230 V - 50 Hz (plugs: C, F)
Sri Lanka 230 V - 50 Hz (plugs: D, G)
Sudan 230 V - 50 Hz (plugs: C, D)
Suriname 127 V / 230 V - 60 Hz (plugs: A, B, C, F)
Svalbard and Jan Mayen
Swaziland 230 V - 50 Hz (plugs: M)
Sweden 230 V - 50 Hz (plugs: C, F)
Switzerland 230 V - 50 Hz (plugs: C, J)
Syria 220 V - 50 Hz (plugs: C, E, L)
Taiwan 110 V - 60 Hz (plugs: A, B)
Tajikistan 220 V - 50 Hz (plugs: C, F)
Tanzania 230 V - 50 Hz (plugs: D, G)
Thailand 230 V - 50 Hz (plugs: A, B, C, O)
Togo 220 V - 50 Hz (plugs: C)
Tokelau 230 V - 50 Hz (plugs: I)
Tonga 240 V - 50 Hz (plugs: I)
Trinidad and Tobago 115 V - 60 Hz (plugs: A, B)
Tunisia 230 V - 50 Hz (plugs: C, E)
Turkey 230 V - 50 Hz (plugs: C, F)
Turkmenistan 220 V - 50 Hz (plugs: C, F)
Turks and Caicos Islands 120 V - 60 Hz (plugs: A, B)
Tuvalu 230 V - 50 Hz (plugs: I)
U.S. Virgin Islands 110 V - 60 Hz (plugs: A, B)
Uganda 240 V - 50 Hz (plugs: G)
Ukraine 230 V - 50 Hz (plugs: C, F)
United Arab Emirates 230 V - 50 Hz (plugs: G)
United Kingdom 230 V - 50 Hz (plugs: G)
United States 120 V - 60 Hz (plugs: A, B)
Uruguay 220 V - 50 Hz (plugs: C, F, L)
Uzbekistan 220 V - 50 Hz (plugs: C, F)
Vanuatu 230 V - 50 Hz (plugs: I)
Vatican 230 V - 50 Hz (plugs: C, F, L)
Venezuela 120 V - 60 Hz (plugs: A, B)
Vietnam 220 V - 50 Hz (plugs: A, B, C)
Wallis and Futuna
Western Sahara
Yemen 230 V - 50 Hz (plugs: A, D, G)
Zambia 230 V - 50 Hz (plugs: C, D, G)
Zimbabwe 240 V - 50 Hz (plugs: D, G)
Compiled by Tripmondo 2018

Last modified: 26.03.2018, edited by: Nils