Editorial Standards

Our purpose

Return Measure publishes calculators that answer specific, narrowly-scoped financial and lifestyle questions in under a minute. Everything is free, runs in your browser, and is intended to give you a real number you can act on, not a sales lead for a third party.

How we choose what to build

Each calculator on this site exists because we believe there is a real, recurring decision people make where a focused tool produces a better answer than a spreadsheet or a generic calculator. We deliberately avoid building general-purpose calculators that already exist in better form elsewhere. Instead, we pick narrow, specific questions: the exact month a refinance starts saving money, the protein floor on a GLP-1 medication, the dollar cost of solar panel shading from a single tree.

How we research the math

Every calculator is built on a publicly documented formula, IRS rule, industry standard, or peer-reviewed guideline. Sources we rely on include:

• Internal Revenue Service publications and revenue rulings for tax calculators.
• Consumer Financial Protection Bureau guidance for mortgage and consumer debt calculators.
• Department of Energy and EPA data for energy and vehicle calculators.
• Peer-reviewed nutrition and clinical guidelines from the Academy of Nutrition and Dietetics and similar bodies for health-related calculators.
• Published price sheets from named providers for technology cost calculators.

When a formula or rule changes (for example, when the IRS updates a threshold), we update the affected calculator and the publish date.

How we write the content

Every explanatory section on this site, including the long-form descriptions on each calculator page, the Learn articles, and the Glossary, is written by hand. We do not use generic templated content. Every paragraph is meant to add something specific that you could not find on a stock calculator site. Where a topic is genuinely nuanced (tax-loss harvesting, GLP-1 nutrition, exit cap sensitivity), we explicitly call out the nuance rather than oversimplify.

What we do not do

• We do not accept paid placement, sponsored content, or affiliate commissions on calculator recommendations.
• We do not require an email address, account, or login to use any tool.
• We do not store the numbers you type into our calculators on any server. All computation happens in your browser.
• We do not sell or share data, because we do not collect it in the first place.

How we handle errors and updates

If you find a calculation error, a stale tax threshold, or an out-of-date reference, please email us at [email protected]. We treat correction requests as priority work and typically ship a fix within a few days. When we make a substantive correction, we update the page's last-updated date.

Advertising disclosure

Return Measure displays advertising through Google AdSense to cover hosting and development costs. We do not control which specific ads are shown, and the presence of an ad does not imply endorsement of the advertiser, their product, or their service. Ads are clearly distinguishable from our own content.

Not professional advice

Everything on Return Measure is general educational information. It is not financial advice, tax advice, legal advice, or medical advice. Before making any decision based on a calculator output, consult a qualified professional licensed in your jurisdiction. The site, its operators, and its contributors accept no liability for decisions made based on the tools provided here.

Contact

Questions about our editorial process, correction requests, or feedback: [email protected]. See the Contact page for more.