SmartBizCalc is a free library of business calculators built for small business owners, contractors, and freelancers who need fast, accurate financial answers — without hiring an accountant or wrestling with a spreadsheet.
Most small business owners don't have a CFO. When they need to know if a job is worth taking, what hourly rate to charge, how much to set aside for quarterly taxes, or whether to form an S-Corp — they either guess, Google endlessly, or pay for advice on a question that a good calculator could answer in 30 seconds.
We built SmartBizCalc to close that gap. Every tool on this site is designed around a real question business owners ask — not a textbook exercise. The inputs are practical, the outputs are actionable, and nothing requires a login or a credit card.
Our tools are built for people who run their own operation — or are thinking about starting one:
Every calculator on SmartBizCalc runs entirely in your browser. We don't send your numbers to a server, store your inputs, or require an account. The formulas are based on current IRS guidance, industry benchmarks, and standard financial models — and we update them annually (or whenever tax law changes).
Each tool includes plain-language explanations, industry benchmarks, and frequently asked questions so you walk away understanding the answer, not just reading a number.
SmartBizCalc will always be free to use. We keep the lights on through advertising. If you find a calculator useful, the best way to support us is to share it with someone who needs it.
Have a suggestion for a calculator we should add, or found an error? Let us know.