About Metriova: Transparent, Browser-Based Calculators

Metriova offers free, browser-based calculators for finance, health, and construction. Every tool uses industry-standard formulas — the same equations banks, doctors, and engineers rely on — so you get results you can trust. No sign-ups, no downloads, no data leaving your device.

How We Ensure Accuracy

We built Metriova because most free calculator sites are cluttered with ads, hide their formulas, or give vague answers. Our calculators show you exactly how each result is computed: the formula, the variables, and the data sources behind default values like interest rates and inflation figures. You can verify every number.

• 1. Standard formulas only. We use the same equations published in financial textbooks, medical journals, and engineering standards. No proprietary or simplified approximations.
• 2. Transparent calculations. Each calculator page displays the formula, explains every variable, and lists the authoritative data sources behind default values.
• 3. Cited data sources. Default values are sourced from institutions including the SEC, CDC, WHO, Federal Reserve, Bureau of Labor Statistics, and the American Concrete Institute.
• 4. No external calls. All math runs client-side in your browser. We never send your inputs anywhere, which means results are instant and private.

Our Approach

All calculations run entirely in your browser using JavaScript. Nothing you type — no income figures, no health data, no financial details — is ever transmitted to a server. Your calculation inputs never leave your device; the anonymous, consent-based analytics we do use are described in our Privacy Policy.

Data Sources We Rely On

Our default values and formula references come from these authoritative institutions:

U.S. Securities and Exchange Commission

Investment returns, compound interest benchmarks

Federal Reserve (FRED)

Interest rates, inflation data, economic indicators

Bureau of Labor Statistics

Consumer Price Index (CPI) for inflation calculations

World Health Organization

BMI classification standards and guidelines

Centers for Disease Control

Body weight and health metric guidelines

American Concrete Institute

Concrete mix ratios and structural standards

Consumer Financial Protection Bureau

Mortgage and loan calculation guidance

National Institutes of Health

Metabolic rate and calorie expenditure research

OECD — Organisation for Economic Co-operation and Development

Cross-country economic data, tax and household income statistics used for international rate comparisons.

International Monetary Fund (IMF)

Global monetary, inflation and lending benchmarks that help calibrate long-term financial projections.

Disclaimer

Metriova calculators are provided for informational purposes only and do not constitute professional financial, medical, or engineering advice. Always consult a qualified professional before making decisions based on calculation results. While we strive for accuracy, we cannot guarantee that results will be applicable to your specific situation.

Contact

Have a question, suggestion, or found an issue with one of our calculators? We would love to hear from you. Reach out using the email below and we will get back to you as soon as possible.

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Editorial Review

All calculators and content on Metriova are reviewed by the editorial team, which verifies formulas, rates, and conventions against authoritative sources and official standards, and updates pages when those standards change.

Metriova reviews every calculator formula, rate table and convention at least quarterly, and pages note the month of their latest review. Questions or corrections are welcome at the editorial mailbox below.

Last updated: July 2026