About GainsMath

GainsMath is an independent website with calculators for strength training: one-rep max estimates, powerlifting scores, RPE, plate loading and program planning.

How the numbers are produced

Each calculator uses a published formula or a published table. The page that uses it names it and links to the source. The full list is on the methodology page.

Your inputs

There are no accounts. With JavaScript on, results are calculated in your browser. With JavaScript off, the form is sent to our server, the result page is built and sent back; the numbers you enter are not saved.

Contact

Corrections and questions: contact page.