Editorial Policy
Our commitment to delivering accurate, transparent, and trustworthy calculators and explanations for all users.
1. Editorial Mission
- • Provide clear, trustworthy calculations for everyday and professional use
- • Explain formulas, assumptions, and limitations in plain language
- • Prioritize user safety and evidence-based information—especially for finance/tax and health topics
2. Source Standards
We use a strict source hierarchy:
Primary/Official
Statutes, regulations, and agencies (e.g., RBI, IRS, HMRC, MCA, WHO, CDC, NIST, BIS, ISO)
Peer-Reviewed
Journals, academic presses, established textbooks
Reputable Secondary
Major universities, recognized professional bodies
Tertiary/Blogs
Used only for background; never to define formulas or rules
Each calculator page includes a Sources section and links to the Sources hub. We avoid paywalled or unverifiable claims and prefer the most recent authoritative document.
3. How Calculators Are Built
Every calculator follows a documented workflow:
Compile official definitions, parameters, thresholds, and units
Define variables, constraints, default values, and edge cases
Write the algebra exactly as implemented; show variable meanings and units
Create a pure compute function with strict TypeScript types
Unit tests against official examples and independently calculated cases
Editorial + subject-matter review
Page ships with visible 'Updated on' date and sources
4. Review Levels (E-E-A-T)
We classify calculators and apply appropriate review:
Health & Fitness (YMYL)
SME review: clinician, physiologist, or reviewer with relevant credentials for sensitive topics
Cadence: at least quarterly or when guidelines change
Finance & Tax (YMYL)
SME review: CA/CPA/Tax practitioner or finance professional for jurisdictional tools
Cadence: quarterly or upon policy changes/notifications
Math & Statistics / Converters & Units
Editorial & QA review for correctness, units, and notation
Cadence: at least annually
5. Assumptions, Units, and Rounding
- • Units: SI units by default; regional units (e.g., inches, pounds) supported via toggles
- • Assumptions: clearly listed (e.g., compounding frequency, body density models)
- • Rounding: documented (decimal places or bankers' rounding where required)
- • Edge cases: inputs validated with ranges and user warnings
6. Accuracy, Testing, and QA
- • Unit tests for every compute function with expected outputs and numerical tolerances
- • Regression tests for critical calculators to prevent formula drift
- • Spot checks against external authoritative examples
- • Accessibility QA: labels, keyboard navigation, screen-reader semantics, color contrast
7. Regional Variants & Effective Dates
For country/state-specific tools (e.g., income tax India vs US):
- • The page lists the jurisdiction, effective period, and last update
- • When rules change, we update promptly and document the revision in the Changelog
- • URLs include the region in the slug (e.g., /finance/income-tax-india)
8. Corrections Policy
If you spot an error:
- Use Contact or the "Report an issue" link on the calculator page
- We triage within 2 business days, fix priority issues quickly, and note changes in the Changelog
- Substantive corrections are labeled on-page with the date and summary
9. Independence, Conflicts, and Ads
- • Editorial independence: Sponsors and advertisers do not influence formulas, rankings, or placement of calculators
- • Labelling: Sponsored content and affiliate links are clearly marked and explained in our Advertising/Affiliate disclosure
- • No pay-to-rank: Calculators are ordered by user relevance, not payment
10. AI Assistance Disclosure
We may use AI tools for drafting interface text, code scaffolding, or grammar checks. All mathematical logic, formulas, and jurisdictional content are human-specified and human-reviewed. We do not publish calculators based solely on AI-generated formulas.
11. Data & Privacy in Calculators
- • By default, inputs are computed in your browser and are not stored
- • If a tool requires server-side processing, we process the minimum necessary data ephemerally
- • If you submit inputs via forms (e.g., feedback/share), we treat them as message content per our Privacy Policy
12. Accessibility & Inclusive Language
We aim for WCAG 2.2 AA: descriptive labels, error messages, focus states, reduced motion, and high-contrast themes. Explanations avoid unnecessary jargon; where technical terms are required, we define them.
13. Style & Notation
- • Prefer SI units and standard symbols; show conversions inline where helpful
- • Use consistent decimal precision per domain (e.g., 2–4 decimals for finance rates; integer outputs where appropriate)
- • Show worked examples so users can reproduce results
14. Security & Responsible Disclosure
If you believe you found a security issue, email us with "SECURITY" in the subject (see Contact). We prioritize security fixes and appreciate responsible disclosure.
15. Reuse & Embedding
We provide embeds for select calculators—see Embed a Calculator for terms and attribution requirements. Do not misrepresent our tools or alter outputs.
16. Changes to This Policy
We may update this Editorial Policy; the date at the top reflects the latest version. Material changes are noted in the Changelog.
17. Contact
Questions about this policy, sources, or a specific calculator?