How long can I stay in South Korea if I approve the K-ETA?

K-ETA permits generally allow you to stay for less than 90 days
However, the period of stay varies depending on the nationality, so I recommend you to check it out

Below is the period of stay by country

30 days
ALBANIA, ANDORRA, BAHRAIN, BOSNIA-HERCEGOVINA, BRUNEI, CYPRUS, ESWATINI, FIJI, GUAM, GUYANA, HOLY SEE, HONDURAS, KIRIBATI, MARSHALL ISLANDS, MAURITIUS, MICRONESIA, MONACO, MONTENEGRO, NAURU, NEW CALEDONIA, OMAN, PALAU, PARAGUAY, SAMOA, SAN MARINO, SAUDI ARABIA, SEYCHELLES, SOLOMON IS, SOUTH AFRICA, TONGA, TUNISIA, TUVALU

60 days
LESOTHO

90 days
ANTIGUA-BARBUDA, ARGENTINA, AUSTRALIA, AUSTRIA, BAHAMAS, BOTSWANA, BRAZIL, BULGARIA, CHILE, HONGKONG, MACAO, TAIWAN, COLOMBIA, COSTA RICA, CROATIA, CZECH, DENMARK, DOMINICAN REP, ECUADOR, EL SALVADOR, DOMINICA, ESTONIA, FINLAND, FRANCE, GERMANY F.R, GRENADA, GUATEMALA, HAITI, HUNGARY, ICELAND, IRELAND, ISRAEL, ITALY, JAMAICA, JAPAN, KUWAIT, LATVIA, LITHUANIA, MALTA, BARBADOS, MOROCCO, NICARAGUA, NORWAY, PANAMA, PERU, POLAND, QATAR, REPUBLIC OF SERBIA, ROMANIA, SINGAPORE, SLOVAK, SLOVENIA, SPAIN, ST. KITTS-NEVIS, ST. LUCIA, ST. VINCENT, SWEDEN, THAILAND, TRINIDAD-TOBAGO, TURKEY, U.A.E, UNITED KINGDOM, UNITED STATES, URUGUAY, VENEZUELA

6 months
CANADA

Guitar
KAZAKHSTAN (No more than 30 days per session, no more than 60 days within 180 days)

FORTUGAL (not more than 90 days per session, not more than 90 days in just 180 days)

RUSIA (not more than 60 days at a time, not more than 90 days in just 180 days)