Calculators that respect your time

Free, fast, ad-free lifting math. Every tool here ships with an open API so developers can wire the same logic into their own apps.

Related tools

1RM Estimator

Estimate your one-rep max from any rep range using six battle-tested formulas.

Plate Calculator

See exactly which plates to load per side for any target weight.

Volume Calculator

Tonnage, set volume, and weekly load tracking for any lift.

Wilks / DOTS / IPF GL

Compare strength across bodyweights with the standard coefficients.

Why these tools?

Most online lifting calculators are walled in by ads, paywalls, or coaching upsells. ProLoad's tools are the lightweight math layer of the ProLoad ecosystem: free for everyone to use, embeddable on any site, and exposed as a developer API for building fitness products.

Use them on their own, or pair them with the ProLoad app to log every set, detect personal records, and track progressive overload across years of training.