CalculatorVerseHome

Our Methodology

Transparency in how we build accurate, reliable calculators you can trust.

Open Formulas

All calculations use industry-standard formulas documented in our code

Validated Results

Each calculator tested against known values and edge cases

Quality Standards

Peer-reviewed formulas and continuous accuracy monitoring

Real-Time Data

Live API integrations for currency rates and dynamic data

1. Formula Sources

All our calculators use established mathematical formulas from trusted sources:

  • Financial Calculators: Standard amortization formulas, compound interest (FV = PV × (1 + r)^n), loan payment calculations
  • Health Calculators: WHO BMI standards, Mifflin-St Jeor equation for calorie needs, validated medical formulas
  • Unit Converters: SI unit conversion factors, internationally recognized standards
  • Scientific Calculators: Peer-reviewed mathematical and physics formulas

2. Validation Process

Every calculator undergoes rigorous testing:

Step 1: Formula Implementation - Coding the mathematical formula with proper order of operations
Step 2: Unit Testing - Testing with known input/output pairs
Step 3: Edge Case Testing - Boundary values, zero values, negative numbers
Step 4: Cross-Verification - Comparing results with established calculators
Step 5: User Feedback - Continuous monitoring and correction based on user reports

3. Data Sources

Currency Exchange Rates

Real-time rates from ExchangeRate-API, updated every hour. Mid-market rates without markup. We clearly disclose that banks and money transfer services add fees.

Reference Data

Temperature references, BMI categories, and other standards from WHO, NIH, and international scientific bodies.

4. Accuracy Limitations

We are transparent about limitations:

  • Rounding: Results rounded to 2 decimal places for readability (internal calculations use full precision)
  • Assumptions: Some calculators make simplifying assumptions (e.g., 365 days/year vs. actual calendar)
  • Regional Variations: Tax rates, regulations vary by location - users should verify local rules
  • Professional Advice: Our calculators are informational tools, not substitutes for professional financial/medical advice

5. Privacy by Design

All calculations are performed client-side in your browser:

  • Your input values never leave your device
  • No server-side storage of calculation data
  • Local storage only for preferences (favorites, recent)
  • Anonymous analytics for usage patterns (no personal data)

6. Continuous Improvement

We continuously improve our calculators:

  • Regular code reviews and security audits
  • User feedback integration and bug fixes
  • Formula updates when standards change
  • New features based on user requests
  • Performance optimization for faster results

7. Third-Party Verification

We encourage users to cross-check critical calculations with multiple sources. For important financial decisions (mortgages, investments), consult with licensed professionals who can account for your specific circumstances.

Report an Issue

Found an error or inconsistency? We take accuracy seriously.

Contact: accuracy@calculatorverse.io