Editorial Policy

Our purpose

CalcAndPlan publishes free calculators and practical articles that help people plan projects and understand everyday numbers. Our goal is accuracy and usefulness — not volume.

Who writes our content

Articles and calculator explanations are written and maintained by the CalcAndPlan editorial team. We don’t publish under invented personal names, and we don’t claim professional credentials we don’t hold.

How calculators are built and tested

• Formulas use standard, widely documented methods (for example, exact unit definitions, the standard loan amortization formula, and the Mifflin–St Jeor equation).
• Each calculation is covered by automated tests that compare results with hand-worked examples or published reference values.
• When a result depends on a product or personal detail — such as paint coverage, gravel density, or a seed rate — we ask for your value or clearly label any typical figure.
• We don’t publish a calculator until its calculations pass testing.

Health and finance content

Health and finance calculators provide general information. They are not medical, financial, tax, or legal advice, and each page says so. We note the limitations of every formula and encourage readers to consult qualified professionals.

Sources and references

We rely on standard formulas and reputable public sources such as government agencies and university extension services. We don’t invent statistics, studies, quotations, or expert endorsements.

Dates and updates

Every article shows its publication date. When we make a meaningful update, we show an “Updated” date. We never backdate articles.

Corrections

If you spot an error, contact us through our contact page. We review every report, fix confirmed errors promptly, and update the article’s date when the change is significant.

Advertising and independence

Advertising, if shown, is clearly labeled and kept separate from calculators and editorial content. Advertisers don’t influence our calculations or articles. See our Privacy Policy for details.