The minimum age per country,  that can legally purchase alcoholic beverages.

EUROPE

  • Albania: 18 | Andorra: 18 | Armenia: 18 | Austria: 16-18 | Azerbaijan: 18
  • Belarus: 18 | Belgium: 18 | Bosnia and Herzegovina: 18 | Bulgaria: 18
  • Croatia:18 | Cyprus:18 | Czechia: 18
  • Denmark: 16-18
  • Estonia: 18
  • Finland: 18-20 | France: 18
  • Georgia: 18 | Germany: 16-18 | Gibraltar: 18 | Greece: 18
  • Hungary: 18
  • Iceland: 20 | Ireland: 18 | Italy: 18
  • Latvia: 18 | Liechtenstein: 16-18 | Lithuania: 20 | Luxembourg: 16
  • Malta: 17 | Moldova: 18 | Montenegro: 18
  • Netherlands: 18 | North Macedonia: 18 | Norway: 18-20
  • Poland: 18 | Portugal: 18
  • Romania: 18 | Russia: 18
  • San Marino: 16 | Serbia: 18 | Slovakia: 18 | Slovenia: 18 | Spain: 18 | Sweden: 18-20 | Switzerland: 18
  • Turkey: 18
  • Ukraine: 18
  • England: 18 | Wales: 18 | Scotland: 18 | Northern Ireland: 18

USA: 21
CANADA: 19
AUSTRALIA: 18

AMERICAS

  • Argentina: 18
  • Bolivia: 18 | Brazil: 18
  • Chile: 18 | Colombia: 18 | Costa Rica: 18
  • Equador: 18
  • Guatemala: 18
  • Mexico: 18
  • Paraguay: 20 | Peru: 18
  • Uruguay: 18
  • Venezuela: 18

ASIA

  • China: 18
  • Hong Kong: 18
  • India: 18-25 | Iran: prohibited | Iraq: 18 | Israel: 18
  • Japan: 20
  • Kazakhstan: 21 | Kuwait: prohibited
  • Lebanon: 18
  • Philippines: 18
  • Qatar: 21
  • Saudi Arabia: prohibired | Singapore: 18 | Syria: 18
  • Taiwan: 18 | Thailand: 20
  • United Arab Emirates: 21

AFRICA

  • Egypt: 21
  • Kenya: 18
  • Liberia: 18 | Libya: prohibited
  • Morocco: 16 (non-muslims)
  • Republic of the Congo: 18
  • Senegal: 18 | Seychelles: 18 | South Africa: 18

more countries & details here

Source: Wikipedia