Editorial Standards & Methodology
Calculator200.com | Last Updated: August 9, 2026
Calculator200.com provides free online calculators and educational financial and health content. Our editorial standards govern how we develop, verify, and maintain all calculator tools and accompanying written content.
Our Mission
To provide accurate, up-to-date, and accessible calculators and educational content that help people make better-informed financial and health decisions. We do not provide professional financial, medical, legal, or tax advice — we provide tools and information to support informed decision-making.
Content Development Process
Every calculator and content page on Calculator200.com follows this development process:
- Formula verification: All calculator formulas are verified against primary sources and standard financial/mathematical references before publication
- Source research: Content claims are sourced from authoritative primary sources (listed below)
- Rate validation: Financial rates (mortgage, interest, tax) are cross-checked against current Federal Reserve, IRS, or equivalent official data
- Accuracy testing: Calculator outputs are tested against known values and cross-validated with established calculators
- Regular updates: Time-sensitive data (interest rates, tax brackets, loan rates) is reviewed and updated quarterly or upon significant changes
Primary Sources We Use
Finance & Economics
- Federal Reserve (federalreserve.gov) — interest rates, monetary policy
- Internal Revenue Service / IRS (irs.gov) — tax brackets, rates, rules
- Consumer Financial Protection Bureau / CFPB (consumerfinance.gov) — mortgage, loan guidelines
- Bureau of Labor Statistics (bls.gov) — inflation, wage data
- Freddie Mac Primary Mortgage Market Survey — weekly mortgage rates
- Fannie Mae (fanniemae.com) — mortgage guidelines
- National Association of Realtors / NAR (nar.realtor) — housing market data
- U.S. Department of Education / studentaid.gov — federal student loan rates
Health & Science
- World Health Organization / WHO (who.int) — BMI classifications, health definitions
- Centers for Disease Control and Prevention / CDC (cdc.gov) — health statistics, guidelines
- National Institutes of Health / NIH (nih.gov) — medical research
- USDA Dietary Guidelines (myplate.gov) — nutrition, calorie guidance
- American Council on Exercise / ACE — body fat classifications
Editorial Independence
Calculator200.com is funded through display advertising (Google AdSense). Our advertisers have no influence over our editorial content, calculator formulas, or data sources. We do not accept payment for favorable coverage, sponsored calculator results, or product recommendations embedded in educational content. Advertising is clearly identified and separated from editorial content.
AI Disclosure Policy
🤖 AI Assistance Disclosure: Calculator200.com uses AI tools (including large language models) to assist in content drafting, formula documentation, and FAQ development. All AI-assisted content is reviewed by our editorial team and verified against authoritative primary sources before publication. Calculator formulas are independently verified. AI assistance does not replace human editorial judgment or source verification. Where AI materially contributed to content, this is noted in the page footer or byline.
Conflicts of Interest
Calculator200.com has no financial relationships with financial institutions, insurance companies, healthcare providers, or any organizations whose products or services may be referenced in our content. Our recommendations and comparisons are based solely on publicly available data and our editorial assessment.
Disclaimer
All calculators and content on Calculator200.com are provided for informational and educational purposes only. Results are estimates based on the inputs provided and standard formulas. They do not constitute financial, tax, medical, or legal advice. Always consult a qualified professional before making significant financial or health decisions.
Contact Editorial Team
For questions about our methodology, source verification, or editorial decisions: contact us here or email editorial@calculator200.com.