The informal use of the term formula in science refers to the general construct of a relationship between given quantities. The plural of formula can be either formulas (from the most common English plural noun form) or, under the influence of scientific Latin, formulae (from the original Latin).

What is difference between formula and Formulae?

Formulae is an alternative plural of formula. It means the same thing as formulas and is interchangeable in most contexts. According to Garner's Modern English Usage, formulas predominates in all written uses with the exception of scientific writing.

What is the correct plural form of formula?

plural formulas or formulae\ ˈfȯr-​myə-​ˌlē , -​ˌlī \