About Return Measure

Why Return Measure exists

Most personal finance websites fall into one of two categories. The first is the content farm: thousands of generic articles optimized for search engines, written by writers who have never actually used the products they describe, and gated by ten different cookie banners and three different newsletter pop-ups. The second is the full-stack fintech app: a piece of software that wants your bank login, your Social Security number, and a 14-day free trial before it will tell you when a refinance breaks even.

Neither of those models serves the person who has a specific, narrow question and wants a specific, narrow answer in under a minute. Return Measure is built for that person. Each tool answers exactly one question, runs entirely in the browser, requires no sign-up, and stores no data anywhere.

How we build a calculator

Every calculator on Return Measure starts from the same checklist. First, the underlying math has to be public and verifiable — we use standard amortization formulas, published IRS tables, EPA range-test methodology, and other primary sources that anyone can audit. Second, the inputs have to be things a non-specialist already knows or can look up in one minute. We will not ask for an internal rate of return assumption when we can ask for the actual interest rate. Third, the output has to be a single, concrete number — the break-even month, the marginal tax rate, the actual monthly payment — not a vague "estimate" with a wide range and no actionable interpretation.

Privacy by design

We do not run analytics on this site. We do not have a Mixpanel, a Segment, a Google Analytics tag, a Facebook pixel, or any other behavioral tracking. The only third-party JavaScript on the site is Google AdSense, which serves the empty ad slots you see below the results sections.

Every calculation runs locally in your browser. Numbers you type into a tool never leave your device. We have no database of user inputs because there is no database at all — the entire site is static files served from a content delivery network.

Who Return Measure is for

The typical person using Return Measure has a specific decision in front of them this week: a refinance quote on the kitchen table, a credit card balance they want to attack, a retirement spreadsheet they want to sanity-check, a tax-loss harvest they want to verify, an EV they are about to buy in a cold-weather state. They do not want to read a 3,000-word article first. They want to enter five numbers and get one number back.

If that describes you, the tools are the main event. If you want the underlying explanation of why the math works the way it does, the Learn section covers the reasoning behind each calculator, and the Glossary defines every technical term that shows up in the tools.

What we will never do

• Ask for your email address to "unlock" a calculation.
• Sell user data, because we do not collect any.
• Add a paid tier on top of a tool that already works for free, then degrade the free version.
• Recommend a specific lender, broker, or product in exchange for an affiliate commission. The tools are deliberately neutral.

How we pay for the site

Return Measure is supported by Google AdSense — the ad slots at the bottom of each tool page. Ads are served by Google's algorithm, not by us, and we do not endorse any specific advertiser that may appear there. If you want to support the site without seeing ads, the best thing you can do is share a useful calculator with a friend who might also need it.

Important disclaimer

Return Measure publishes estimates only. Nothing on this site is financial, tax, legal, or medical advice. Calculations are based on standard formulas and published reference data, but real-world outcomes depend on facts and circumstances that no general-purpose calculator can capture. Always consult a qualified professional — a fee-only financial planner, a CPA, a real estate attorney, a licensed mortgage broker, a registered physician — before making decisions about your money, taxes, investments, or health.

Contact

For corrections, suggestions, or requests for new calculators, write to [email protected].