About TheCalcNerd

TheCalcNerd is a small, independent project built and maintained by Hugo Cardozo. The goal is simple: free personal finance calculators that show the actual math behind the number, instead of a black box you're supposed to trust.

Why this site exists

Most "calculator" sites online either hide their formulas entirely or bury a useful tool under walls of ads and required signups. TheCalcNerd takes the opposite approach — every calculator comes with a plain-English explanation of the formula it uses, a worked example with real numbers, and answers to the questions people actually ask about that topic. No signup, no email wall, no spreadsheet download required — just open a calculator and get your answer.

How each calculator is built and verified

Every formula on this site is first implemented and hand-verified in a standalone script with realistic default inputs before it's ever written into a live calculator, and the same worked example appears in both the calculator's results and its accompanying guide so you can check the math yourself. Where a calculator depends on official figures that change over time — IRS contribution limits, Social Security wage bases, and similar — those numbers are checked directly against current government sources (irs.gov, ssa.gov) rather than relied on from memory, and each page notes when it was last updated.

About the author

Hugo Cardozo is a digital marketing specialist and web developer with over 10 years of experience in SEO/SEM, CMS platform management, and technical support. He builds and maintains independent web projects focused on organic traffic and monetization, including TheCalcNerd. You can find Hugo's professional background and other projects on LinkedIn.

What this site is not

TheCalcNerd is not a financial advisory service, and nothing here should be treated as personalized financial, tax, or legal advice — see our Terms of Use for the full disclaimer. For decisions with real financial stakes, use these tools to understand the math, then confirm the specifics with a qualified professional.

Questions or corrections

Found a calculation that looks off, or want to suggest a new tool? Reach out via our contact page — corrections are taken seriously and verified before any change is published.