Precise Calculator

Calculator disclaimer

Mathematical identity does not guarantee that a model fits a real situation. Measurements can be imprecise, rates can be defined differently, and rules can vary by location or date.

High-stakes decisions

Do not use this site alone to set medication, diagnose health, certify military compliance, size an electrical installation, approve construction, calculate legally required pay, value a security for trading, or issue an official golf handicap.

Measurements and source data

A correct formula can still produce an unsuitable result when measurements, rates, densities, dates, or policy inputs are inaccurate. Confirm material values and time-sensitive rules with the relevant supplier, institution, authority, or qualified professional.

Rounding

Unless a named method requires a specific rule, calculations retain JavaScript numeric precision and round only the displayed result. Copying a display value into a later calculation can therefore differ slightly from using the unrounded internal value.