Il numero romano MMDCCCIII nel sistema decimale vale: 2803.
MMDCCCIII in latino si scrive duo milia octingenti tres,
mentre in italiano duemilaottocentotré.
MMDCCLXXXIV, MMDCCLXXXV, MMDCCLXXXVI, MMDCCLXXXVII, MMDCCLXXXVIII, MMDCCLXXXIX, MMDCCXC, MMDCCXCI, MMDCCXCII, MMDCCXCIII, MMDCCXCIV, MMDCCXCV, MMDCCXCVI, MMDCCXCVII, MMDCCXCVIII, MMDCCXCIX, MMDCCC, MMDCCCI, MMDCCCII, MMDCCCIV, MMDCCCV, MMDCCCVI, MMDCCCVII, MMDCCCVIII, MMDCCCIX, MMDCCCX, MMDCCCXI, MMDCCCXII, MMDCCCXIII, MMDCCCXIV, MMDCCCXV, MMDCCCXVI, MMDCCCXVII, MMDCCCXVIII, MMDCCCXIX, MMDCCCXX, MMDCCCXXI, MMDCCCXXII