About
About Geometric Mean Calculator
Formulas follow standard definitions from Wolfram MathWorld, OpenStax Introductory Business Statistics, and the NIST Dataplot reference. Returns mode converts each return to a growth factor, takes the nth root of the product, and subtracts 1. All calculations run in your browser.
The site includes six specialized calculators — geometric mean, arithmetic mean, harmonic mean, variance & standard deviation, CAGR, and CAGR-to-XIRR — plus the geometric mean altitude theorem for right-triangle geometry. Each calculator shows the formula, works through a numeric example step by step, and explains when a different metric would be more accurate. Comparison guides cover GM vs AM, GM vs HM, CAGR vs GM, CAGR vs XIRR, mean-median-mode-range, and a decision-flow tool for choosing the correct average.
How we check formulas and examples
Responsibility for the content on geometricmeancalculator.com rests with the site's publisher. We do not claim named expert reviewers, ratings, or certifications. Instead, formulas on the site are checked against primary references: the Wolfram MathWorld entry on the geometric mean, section 2.5 of OpenStax Introductory Business Statistics 2e, and the NIST Dataplot reference for the geometric mean. Worked examples state their inputs and intermediate results so readers can recompute them. Calculator results are computed locally in your browser from the numbers you enter. Messages sent through the contact page are handled separately from the calculator. Results describe the data you enter and are not financial advice or a forecast. To report an error, please use the contact page.