About SmallBizMath

SmallBizMath is a set of free, practical calculators for small-business pricing and promotion decisions.

The goal is simple: give freelancers, service businesses and ecommerce sellers clear, formula-backed tools to answer specific questions — what to charge per hour, what a discount actually costs in profit, whether a BOGO promotion makes sense — without a sign-up, a paywall, or a sales pitch.

Every calculator shows its formulas, its assumptions and a worked example, so you can verify the math yourself rather than trust a black box. See the methodology pages for the full formula reference.

What SmallBizMath is not

SmallBizMath does not provide tax, legal or accounting advice, and does not claim to know your local market rate. It calculates sustainable internal numbers from the inputs you provide — you remain responsible for pricing decisions and for verifying tax and legal requirements with a qualified professional.

Questions or feedback? Visit the contact page.