CentMath publishes free business and finance calculators for marketers, sales teams, online sellers, founders and small business owners. Every tool shows the formula it uses and the steps behind the result, so the numbers can be checked and explained.
Who CentMath Is For
The calculators are built for people who make money decisions at work. That includes media buyers checking CPM and ROAS, sales reps working out commission, sellers pricing products after fees, and owners reviewing margins and break-even points.
Our Standards
Each formula comes from a primary source, such as ad platform documentation, government publications or standard finance references. Results show every step with the numbers you enter. Calculators are tested before release, and fee schedules carry the date they were last checked.
The full process is set out in the Editorial Policy.
Independence
No company pays to be featured, ranked or recommended on CentMath. The calculators do not favor any platform, lender or service.
Important Limits
CentMath calculators give estimates for planning and analysis. They are not financial, tax or legal advice. For major decisions, confirm the figures with the official source or a qualified professional. See the Disclaimer for details.
Get in Touch
Questions, calculator requests and error reports are welcome through the contact page. Reported errors are reviewed and fixed through the corrections process.