Calculate the Monoisotopic Mass for your Drug

Enter the empirical formula of the drug:

C H N O S F Cl Br I P

The monoisotopic mass is calculated using atomic masses of the most abundant isotope of each atom, accurate to at least 7 decimal places according to IUPAC. Rounding to six decimal places is applied after calculation of the monoisotopic molecular mass.

The accuracy of the calculation has been checked, but the user accepts all responsibility for using the output of this tool in their work.