The Elektronika MK-18M (Russian: Электро́ника МК-18М) was a scientific calculator manufactured in the Soviet Union. It was released in 1986.
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The Elektronika MK-18M calculator has no new novel functionality. Despite this, the aluminum casing was an improvement from previous models plastic casing. In addition, the model was produced at a Billur (Kirovograd), in contrast to the Elektronica B3-18 and B3-18A models which were manufactured at Angstrem (Zelenograd) and NPO Elektronika (Boguchar, Voronezh Region).