Editorial Policy

1. Our mission

Calculator Friendly exists to help people answer everyday questions — about money, health, dates, construction and conversions — without having to relearn the underlying maths or trust opaque, ad-cluttered tools. Every calculator we publish is built to be accurate, fast, mobile-first and clearly explained.

2. Editorial independence

Our editorial decisions — which calculators to build, which formulas to use, what guidance to publish — are made independently of any advertiser, sponsor or third party. Advertising never influences the results a calculator returns or the wording of an explanation. We do not accept payment in exchange for favourable mentions, links or rankings.

Where a calculator touches on a regulated domain (finance, health, legal, tax) we explicitly state that our results are informational only and link to our Disclaimer.

3. How a calculator is built

Each new calculator goes through the same five-step pipeline before it appears on the site:

1. Research. We identify the canonical formula(s) from authoritative primary sources — academic textbooks, government bodies (e.g. NIST, NHS, IRS), engineering standards (e.g. ASTM, BS, ISO) or peer-reviewed literature.
2. Specification. We document the inputs, units, edge cases, rounding rules and the exact formula being applied, with citations.
3. Implementation. The maths is coded in TypeScript and runs entirely in your browser — no inputs are sent to our servers — so results are instant and your data stays private.
4. Verification. Every calculator is cross-checked against worked examples from the original source and against an independent reference implementation (spreadsheet, scientific calculator or another trusted tool).
5. Editorial review. A second person reviews the formula, copy, units and edge-case behaviour before publication.

4. Sourcing & citations

Where a calculator or accompanying article references a specific figure, rate, formula or recommendation, we cite the underlying source directly on the page. We prefer:

• Primary sources (official agencies, regulators, standards bodies).
• Peer-reviewed academic publications.
• Recognised industry references and textbooks.

We avoid sourcing facts from anonymous forums, AI-generated summaries or content farms. When a figure changes (e.g. a tax threshold or a recommended daily intake) we update the calculator and note the revision date.

5. Use of AI tools

We use AI assistants to speed up tasks like drafting boilerplate copy, generating test cases and reformatting data. AI is never the source of truth for a formula, statistic or claim. Every published calculator and article is reviewed, verified and edited by a human against primary sources before it goes live.

6. Accuracy, updates & versioning

We treat accuracy as a living standard, not a one-time check. Calculators are revisited when:

• The underlying formula, standard or rate changes.
• A reader reports a discrepancy or edge case (see corrections below).
• We add new units, scenarios or accessibility improvements.

Each page shows a “Last updated” date so you can see when it was last reviewed.

7. Corrections policy

If you spot a calculation that doesn't match a trusted reference, a broken edge case or an out-of-date figure, please tell us. We treat accuracy reports as our highest-priority work item.

• Email support@calculatorfriendly.com with the URL, the inputs you used, and the result you expected.
• Or use our contact form.
• Verified errors are fixed promptly. Material corrections are noted on the page with a revised “Last updated” date.

8. Advertising & sponsorship

Calculator Friendly is supported by advertising — primarily Google AdSense — which keeps every tool free to use. We follow these rules:

• Ads are clearly distinguishable from editorial content. We do not publish native or “advertorial” content disguised as editorial.
• Advertisers do not see, review or approve editorial content before publication.
• We honour the Google AdSense Program Policies and the Google Publisher Policies, including restrictions on adult, deceptive, dangerous or discriminatory content.
• Affiliate links, when used, are disclosed inline and never influence which calculator we recommend or how a result is calculated.

See our Cookie Policy for the cookies used by ad partners and how you can control them.

9. Content we will not publish

To keep Calculator Friendly safe, useful and aligned with major ad and search platform policies, we do not publish:

• Content that promotes hatred, harassment or discrimination.
• Sexually explicit or shocking material.
• Calculators or guides that could enable physical harm (weapons, dangerous chemicals, self-harm methods).
• Misleading financial, medical or legal advice presented as fact.
• Plagiarised content or auto-generated articles published without human review.

10. Privacy & data handling

Calculator inputs are processed in your browser and are not sent to our servers unless a calculator explicitly says so. For details on what we collect site-wide and your choices, see our Privacy Policy.

11. Authorship & contact

Calculator Friendly is produced by a small team of editors and engineers who care about getting the maths right. For editorial questions, source verification or correction requests, contact support@calculatorfriendly.com. We aim to reply within a few working days.

12. Changes to this policy

We may update this Editorial Policy as our standards or processes evolve. The “Last updated” date at the top of the page reflects the latest revision; significant changes will be highlighted on the site.

13. Frequently asked questions

Quick answers to the questions advertisers, partners and policy reviewers ask most often about how Calculator Friendly is run.

Have a question that isn't covered here? Email support@calculatorfriendly.com or use our contact form.