Data boundaries
Privacy
Calculator inputs and results stay in your browser. This page explains the limited traffic and interaction data that may be sent when analytics is enabled.
Effective July 15, 2026
Calculations stay on your device
Probability, percentile, mean, standard deviation, raw values, z-scores, bounds, and calculated results are processed in the browser. They are not placed in URLs, browser storage, analytics events, or an application database.
Limited Google Analytics measurement
When Google Analytics is enabled, the site may send standard page-view information such as the page URL, referrer, browser or device characteristics, and approximate geography. Google Analytics may use first-party cookies for measurement. Enhanced Measurement is disabled for this data stream.
The calculator can send only these custom event names:
calculator_interaction_startedinverse_normal_calculatednormal_probability_calculatedcalculator_validation_error
Their custom properties are limited to page, mode, input-basis or input-format choices, whether a custom mean and standard deviation were used, and a finite validation error code. They do not include the numbers you enter or the answers produced.
Your choices and the analytics provider
Browser privacy controls, content blockers, or disabled cookies may limit analytics collection without affecting calculator results. Google processes analytics data under its own terms and privacy policy.
Read Google’s Privacy Policy or return to theInverse Calculator.