Editorial Standards
How we ensure every piece of content on FreeCalc.Tools is accurate, reliable, and genuinely useful.
Our Commitment to Accuracy
Every calculator on FreeCalc.Tools is built on verified formulas from authoritative sources. We believe that free tools should be just as reliable as paid alternatives.
Verified Formulas
Each calculator implements formulas from authoritative sources like the Federal Reserve, WHO, NIH, CFPB, and established mathematical principles.
Tested with Real Data
We verify every calculator against known inputs and expected outputs. For example, our mortgage calculator is tested to produce exact monthly payment figures.
Source Citations
We cite our sources on each calculator page so you can independently verify the formulas and methodologies we use.
Regular Updates
Tax rates, inflation figures, and other time-sensitive data are updated regularly to reflect current conditions.
Content Creation Process
Our blog articles and guides follow a structured process to ensure quality:
- Research Phase: We identify real-world problems people face when using financial, health, and other calculations. Each article addresses a specific, practical need.
- Writing Phase: Content is written with specific examples, real numbers, and actionable advice. We avoid generic filler and template phrases.
- Quality Review: Every article is scored on multiple dimensions including empathy (does it understand the reader's problem?), specificity (does it include real numbers and examples?), and practicality (can the reader immediately apply the advice?).
- Technical Review: All formulas, calculations, and financial claims are verified against authoritative sources.
Quality Criteria
Every published article must meet these minimum standards:
- Minimum 500 words for English articles, with substantive content in each section
- Specific examples with real numbers (not placeholder values)
- Actionable advice that readers can immediately apply
- Accurate calculations verified against known test cases
- Clear source attribution for formulas and data points
Correction Policy
If you find an error in any of our calculators or articles, we want to know about it.
To report an error: Email us at freecalc@adorit.be
Please include the calculator name, the specific issue, and what you expected vs. what you got. We aim to respond within 48 hours and fix verified errors within one week.
Our Sources
We rely on established, authoritative sources for our formulas and data:
Finance
Federal Reserve, CFPB, IRS publications, CFA Institute standards
Health & Fitness
WHO guidelines, Mifflin-St Jeor equation, NIH clinical guidelines
Real Estate
NYT mortgage calculator verification, CFPB closing cost guidelines
Crypto & Blockchain
On-chain data from blockchain explorers, exchange rate APIs
Transparency Note
FreeCalc.Tools is operated by Adorit BV, Some of our blog content is generated with AI assistance and reviewed by our development team. Every article is checked for accuracy, specificity, and genuine usefulness before publication. We are programmers, not certified financial planners or medical professionals. Always consult qualified professionals for important decisions.