Methodology and limitations

Calculation model

Calculations run locally in JavaScript using the inputs and units shown on each page. Displayed results are rounded; intermediate floating-point arithmetic may produce small differences from specialist systems.

Rates and changing rules

TrueCalco does not claim live market data. The currency tool requires a rate supplied by the user. Tax, Social Security, and similar rule-dependent tools are simplified scenarios and are not maintained as official current-rule engines.

Health and nutrition

Population formulas such as BMI and BMR are screening estimates. They cannot account for every medical condition, body composition, medication, pregnancy, or individual need and must not replace clinical advice.

Entertainment tools

Love, zodiac, lucky-number, numerology, friendship, and life-expectancy tools are recreational. Their outputs have no scientific or predictive validity.