Editorial Policy

How tools are built

Each tool is a self-contained static page; all math runs client-side in your browser. A tool ships only after it has real formulas (not approximations dressed up as answers), at least one reference data table, a worked example with stated numbers, and a plain-English page explaining what the result means and what it doesn't.

How results are verified

• Two worked examples per calculator. Before release, every formula is checked against two hand-computed cases with the arithmetic shown on the page.
• Primary sources for every constant. Tax brackets come from IRS publications, benefit figures from SSA and CMS documentation, health equations from peer-reviewed literature (e.g., Mifflin-St Jeor for calorie estimates, Brysbaert 2019 for reading speed), and cost ranges from published industry surveys.
• Cross-checks against independent calculators for standardized math (loan amortization, compound interest, BMI) where results must agree to the cent or the decimal.
• Limits stated on the page. Where an estimate is sensitive to assumptions — insurance location factors, regional cost indexes — the page says so and shows the range rather than a false-precision single number.

Review and updates

Reference data is reviewed on a rolling schedule, and time-sensitive figures (tax years, benefit amounts, contribution limits) are refreshed each year when the governing agency publishes new numbers. Each page carries an "Updated" date reflecting its last substantive review. Pages that depend on annual data are re-verified or marked with the applicable year.

Data sources

We cite sources on the pages that use them. Commonly used references include: IRS publications and notices; Social Security Administration and CMS program data; BLS consumer expenditure and price data; Federal Reserve and GSE rate surveys; The Knot Real Weddings Study; AAA Your Driving Costs; and peer-reviewed meta-analyses for health and cognition figures. Where we rely on a commercial survey, we name it and its year.

Corrections

If a number or formula is wrong, we fix it — usually within days of confirmation. Substantive corrections change the underlying math or a stated figure, are made directly in the tool, and are acknowledged by email to the reporter. We do not silently change published results without re-verifying the full worked example. Report anything to [email protected] with the URL and what looks off.

Independence and advertising

Tool pages carry advertising, but no tool's output is influenced by an advertiser, and we don't accept payment to rank, recommend, or omit tools. Editorial and tool-math decisions are made independently of revenue.

Not professional advice

ToolAspect provides estimates for informational purposes only. It is not financial, tax, legal, medical, or veterinary advice. Consult a qualified professional before acting on results that involve significant money or health decisions.