Il numero romano MDXVIII nel sistema decimale vale: 1518. MDXVIII in latino si scrive mille quingenti duodeviginti, mentre in italiano millecinquecentodiciotto.
MCDXCIX, MD, MDI, MDII, MDIII, MDIV, MDV, MDVI, MDVII, MDVIII, MDIX, MDX, MDXI, MDXII, MDXIII, MDXIV, MDXV, MDXVI, MDXVII, MDXIX, MDXX, MDXXI, MDXXII, MDXXIII, MDXXIV, MDXXV, MDXXVI, MDXXVII, MDXXVIII, MDXXIX, MDXXX, MDXXXI, MDXXXII, MDXXXIII, MDXXXIV, MDXXXV, MDXXXVI, MDXXXVII