Editorial Policy

Our Mission

Calczy provides free, ad-supported online utility tools — including unit converters, finance calculators, developer tools, text tools, and health calculators. Our goal is to be the most reliable and fastest free tools platform on the web.

Content Creation Process

Every tool page on Calczy follows a structured creation process:

1. Topic selection: We identify tools based on search demand, user needs, and gaps in existing free tools.
2. Development: Each tool widget is built as a client-side component using established libraries and formulas.
3. Conversion factors: All unit conversion factors are sourced from official standards (NIST, ISO, BIPM) and verified against multiple references.
4. Content writing: Intro text, formulas, examples, and FAQs are written by our editorial team to explain the concept clearly.
5. Review: Each page is reviewed for accuracy, clarity, and completeness before publication.

Accuracy Standards

We hold our content to the following accuracy standards:

• Conversion factors: Sourced from NIST Handbook 44, ISO 80000, and BIPM SI Brochure. Displayed with up to 8 decimal places.
• Finance formulas: Standard financial formulas (compound interest, amortization, etc.) verified against textbook references.
• Health calculations: Based on WHO, NIH, and CDC published formulas. Not a substitute for professional medical advice.
• Regular audits: We periodically audit our tools for accuracy and update conversion factors when standards change.

Review Process

Every tool page is reviewed by the Calczy Editorial Team before publication. The review checks:

• Tool widget functions correctly (no JavaScript errors)
• Conversion factors and formulas are accurate
• Content is original, clear, and helpful
• Page is mobile-responsive at 375px viewport
• Structured data (schema.org) is valid
• Meta description and title meet SEO best practices

Updates and Maintenance

We continuously maintain our tools:

• Conversion factors: Updated when official standards change (rare for most units).
• Currency rates: Updated daily via European Central Bank API.
• Content refreshes: We periodically expand and improve content based on user feedback and search trends.
• Bug fixes: Reported issues are prioritized and fixed promptly.

Sources and References

Our conversion factors and formulas are sourced from:

• NIST Handbook 44 — Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices
• BIPM — International System of Units (SI) Brochure
• ISO 80000 — Quantities and Units
• European Central Bank — Daily exchange rates
• WHO, NIH, CDC — Health and nutrition formulas

Advertising Policy

Calczy is ad-supported. We display a maximum of 1-2 ad slots per page, placed after the tool widget so they don't interfere with usability. We never place ads above the fold or in ways that harm the user experience. Our tools work without ads blocking functionality.

Contact

Found an error or have feedback? Contact us at our contact page. We take accuracy reports seriously and investigate all reports promptly.