Verify the results or perform the calculations that involves analytic, *algebraic*, *geometry*, arithmetic and combinatorial computations by comparing the results of manual and calculator calculations or using these number conversion calculators. In general, the number theory is an important branch of mathematics that deals with performing various arithmetic operations based on addition, subtraction, division, equation solving, rational numbers, irrational numbers, quadratic functions, exponentiation, prime, factorization, negative numbers, complex numbers, *fraction arithmetic* etc. The main objective of these calculators is to assist students, professionals and researchers quickly perform or verify the results of such calculations to save their time.