This free calculator is able to convert Decimal Numbers in Roman Numbers.The best app for school, college and work! If you are a student, it will helps you to learn roman numerals.Note: Roman numerals, the numeric system used in ancient Rome, employs combinations of letters from the Latin alphabet to signify values. The numbers 1 to 10 can be expressed in Roman numerals as follows:I, II, III, IV, V, VI, VII, VIII, IX, X.