Editorial Policy
Scope
This policy describes how calculator content on CalcProMaster is written, verified, and corrected. It applies to every calculator page, guide, and blog post on this site.
How Content Is Written
Each calculator page states the standard, publicly documented formula it implements, walks through a worked example with expected values, and explains the assumptions and limitations of the method. Financial, health, and regional-tax content follows conventions from authoritative sources — national statistical agencies, standards bodies, and published clinical or financial formulas — cited on the page where a specific source supports a specific figure.
How Content Is Verified
- Formula check. The implemented formula is compared against its published definition before a calculator ships.
- Hand-verified examples. Each page's worked example is computed by hand and must reproduce exactly in the tool.
- Automated regression tests. Every calculator is covered by a QA contract with independently computed expected results; the suite runs on every build, and a failing tool is not promoted to the sitemap. The current matrix is public on the QA dashboard.
Who Writes and Reviews It
CalcProMaster is built and maintained by its developer, whose background spans mathematics and software engineering. Content is written and reviewed by the same person who maintains the calculation engine and its test suite — not by external contributors. The developer is not a licensed financial advisor or medical professional; finance and health pages carry explicit disclaimers stating this, and results are presented as math education, not professional advice.
Corrections
Found an error in a formula, example, or explanation? Email [email protected] with the page URL and what you expected. Confirmed errors are fixed and re-tested before the next build; we aim to respond within 2-3 business days.
Updates
When a formula, default rate, or convention changes, the affected pages are regenerated and re-tested. Pages are not redated cosmetically — a page's review date changes only when its content actually changes.
Sources We Rely On
Formulas come from primary standards where one exists — ISO and IEC definitions for units and engineering quantities, national statistical agencies and tax authorities for rates and thresholds, and published clinical or exercise-science equations for health metrics. When a figure changes annually, the page names the year of the rate rather than implying it is permanent. Where no single standard exists, the page says which convention it follows and what an alternative convention would change.
Methodology by Category
Every calculator page links here. This is the part of the policy that changes by subject: the convention each category follows, stated once instead of repeated in full on all 1,285 tool pages. Where a page follows a different convention, that page says so.
Finance
Standard financial formulas — amortisation, compound interest, present and future value, tax brackets — using the same conventions banks and tax authorities publish. Rates and thresholds are clearly labelled and dated.
Health
Published, peer-reviewed formulas such as BMI, BMR (Mifflin-St Jeor), body-fat and dosage conventions. Results are estimates and never a substitute for professional medical advice.
Math
Established algebraic and geometric identities and numerical methods, evaluated with the same order of operations used in textbooks.
Everyday
Straightforward arithmetic, date and unit logic, using standard calendar and measurement conventions.
Science
SI-based physical constants and standard scientific formulas, with units carried through the working.
Engineering
Standard engineering formulas and material properties from published handbooks, with safety factors noted where they apply.
Construction
Trade-standard estimating formulas and code-referenced tables (conduit fill, offsets, load estimates), with material allowances stated.
Conversion
Exact or published conversion factors, applied with the standard significant-figure rules.
Business
Common business and marketing formulas (CAC, LTV, margin, break-even, rate cards) using widely published benchmark methods.
Education
Published cost-of-attendance, aid and loan-amortisation methods, with sources and assumptions stated.
Utilities
Standard utility formulas such as energy use, cost per unit and efficiency, using published tariffs as inputs only.
Lifestyle
Everyday planning formulas with clearly stated assumptions and ranges.
Regional
Region-specific rules and rates for India, Pakistan and the Gulf, sourced from published rates and clearly labelled as estimates that change.
Food & Nutrition
Published nutrition data and standard macro and calorie methods, using accepted energy conversions.
Fitness
Published exercise-science formulas for calories, one-rep-max and pace, with the assumptions stated.
Auto & Transport
Standard vehicle formulas for fuel use, running costs and depreciation, using published efficiencies as inputs.
Career
Published pay, points and screening conventions (immigration points tests, ATS heuristics, negotiation bands), labelled as guidance.
Home & Garden
Standard home and garden estimating formulas (payback, area, yield, maintenance allowances) with the assumptions stated.
Tech & Digital
Standard digital and computing formulas, including the correct base-2 versus base-10 units.
Family
Family and parenting planning formulas using published schedules and clearly stated assumptions.
What We Do Not Cover
We do not publish personalised advice, product rankings, lending or insurance offers, or anything that requires knowing an individual's full circumstances. We also avoid calculators whose only purpose is producing a number nobody can check. If a tool cannot show its formula and a reproducible example, it does not ship here.
Advertising & Independence
Ads and affiliate links never determine calculation results, formulas, or recommendations. Any sponsored placement is labeled. See our Privacy Policy for data practices — calculations run entirely in your browser.
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