Conscription in Finland is part of a general compulsion for national military service for all adult males (Finnish: maanpuolustusvelvollisuus; Swedish: totalförsvarsplikt) defined in the 127§ of the Constitution of Finland.
Conscription can take the form of military or of civilian service. According to Finnish Defence Forces 2011 data slightly under 80% of Finnish males turned 30 had entered and finished the military service. The number of female volunteers to annually enter armed service had stabilised at approximately 300. The service period is 165, 255 or 347 days for the rank and file conscripts and 347 days for conscripts trained as NCOs or reserve officers. The length of civilian service is always twelve months. Those electing to serve unarmed in duties where unarmed service is possible serve either nine or twelve months, depending on their training.
Any Finnish citizen who refuses to perform both military and civilian service faces a penalty of 173 days in prison, minus any served days. Such sentences are usually served fully in prison, with no parole.Jehovah's Witnesses are exempted in that they may be granted a deferment of service for 3 years upon presentation of a certificate from their congregation's minister showing they are an active member of that religious community. Providing they are still an active member 3 years later, there is nothing to stop them getting a further certificate and deferment. The inhabitants of the demilitarized Åland Islands are exempt from military service. By the Conscription Act of 1951, they are, however, required to serve a time at a local institution, like the coast guard. However, until such service has been arranged, they are freed from service obligation. The non-military service of Åland islands has not been arranged since the introduction of the act, and there are no plans to institute it. The inhabitants of Åland islands can also volunteer for military service on the mainland. As of 1995, women are permitted to serve on a voluntary basis and pursue careers in the military after their initial voluntary military service.