除隊日計算機

入隊日と兵科に基づいて韓国の除隊日を計算します。

Overview

Korean conscript service runs a fixed number of months from the enlistment date, with that date counted as day one. The discharge date is therefore the enlistment date plus the branch duration, minus one day. Army and Marines serve 18 months, Navy 20, and Air Force and Social Service 21 — a three-month spread that reflects each branch's training investment.

除隊日

D-Day

服務期間

兵科別服務期間

兵科 期間
陸軍 (육군)18 ヶ月
海兵隊 (해병대)18 ヶ月
海軍 (해군)20 ヶ月
空軍 (공군)21 ヶ月
社会服務要員 (사회복무요원)21 ヶ月

How to Use

  1. 1
    Enter your values

    Type your numbers into the Military Discharge Date Calculator input fields.

  2. 2
    Adjust the options

    Choose the units, method, or region that fits your situation, or apply a quick preset.

  3. 3
    Read the result instantly

    The result updates as you type — no submit button, and nothing is sent to a server.

About

Because the term is stated in months rather than days, an 18-month obligation spans between 546 and 550 actual days depending on which months it covers and whether a 29 February falls inside it. Enlistment on the 31st of a month is clamped to the last valid day of the target month before the inclusive-counting correction is applied.

Service periods have fallen repeatedly since the 1990s, when Army service ran to 26 months; the current durations date from the 2018 reduction schedule. Accumulated leave or a designated early release date supersedes the calculated figure.

Frequently Asked Questions

How long is mandatory military service in South Korea?
Service length varies by branch: Army and Marines serve 18 months, Navy serves 20 months, Air Force serves 21 months, and Social Service (alternative service) is 21 months. These durations were reduced from longer periods in 2018 and 2020.
Who is required to serve in the Korean military?
All Korean male citizens aged 18–28 must complete mandatory military service. Exemptions are rare and may be granted for significant physical disabilities, certain elite athletes (e.g., Olympic/Asian Games medalists), or through alternative service programs.
Can the discharge date change after enlistment?
The discharge date is set at enlistment based on the service branch and start date. It typically does not change unless there are special circumstances such as disciplinary actions (which can extend service) or policy changes affecting service length.

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