Built and maintained by an independent developer.
About Calcoras
Calcoras is a free collection of fast, accurate online calculators and money guides, built to help people make confident financial decisions — from paychecks and taxes to loans, mortgages, savings and retirement.
We believe financial math shouldn't require a finance degree, a paid app, or a wall of pop-ups. Every tool runs instantly in your browser, needs no sign-up, and gives you a clear answer in seconds.
Who's behind it
Calcoras is an independent project built and maintained by a single developer who got tired of slow, cluttered, sign-up-walled calculator sites. It's a small, self-funded site — there's a real person reading your messages on the contact page.
Our commitment to accuracy
We take accuracy seriously. Our tools use established formulas and current public data — for example, 2025 U.S. federal tax brackets and FICA rates for the paycheck and income-tax tools, and figures from sources like the Federal Reserve and the Bureau of Labor Statistics for our comparison data. Tax laws and rates change, and every result is an estimate, so we label our tools clearly and recommend confirming important decisions with a qualified professional. If you ever spot a result that looks off, tell us and we'll review it.
Editorial independence
Ads and affiliate links never influence our calculators, results or guidance. The math is the math. Advertising simply lets us keep every tool free for everyone.
What we offer
- Paycheck, income-tax, sales-tax and loan/mortgage calculators
- Retirement, savings, compound-interest and debt-payoff tools
- Free budgeting spreadsheets, printables and practical money guides
How we make money
Calcoras is free to use. We may display ads and, in some articles, include affiliate links — always clearly, and never in a way that changes a calculator's result. See our Privacy Policy and Disclaimer for details.
Questions or suggestions? We'd love to hear from you on our contact page.