Measurements and Units Calculators
Browse measurements and units tools. Each link opens a dedicated calculator with instructions, formulas, examples and related references.
- Height Calculator
Convert a height between centimeters, meters, feet and inches.
- Unit Converter
Convert common length, mass, temperature and volume units.
- GDP Calculator
Calculate expenditure-side gross domestic product from its component values.
- Density Calculator
Calculate density, mass or volume from the other two quantities.
- Mass Calculator
Calculate mass from density and volume, with consistent SI units.
- Weight Converter
Convert between common mass units including kilograms, grams, pounds and ounces.
- Speed Calculator
Calculate speed, distance or travel time from the other two values.
- Molarity Calculator
Calculate solution molarity from solute amount and solution volume.
- Molecular Weight Calculator
Calculate approximate molar mass from a chemical formula, including grouped formulas.
- Roman Numeral Converter
Convert positive integers from 1 to 3999 to Roman numerals and back.