Conversion calculators

Length Converter

Convert millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles, with reference tables for heights, tool sizes, and race distances.

Weight Converter

Convert between micrograms, milligrams, grams, kilograms, ounces, pounds, stone, and US tons instantly, with reference tables for body weight, cooking, and dosing.

Time Converter

Convert between seconds, minutes, hours, days, weeks, months, and years instantly, with reference tables and worked examples for ages, projects, and countdowns.

Volume Converter

Convert between teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons, milliliters, and liters, plus kitchen and bottle-size reference tables.

Number Base Converter

Convert between binary, octal, decimal, and hexadecimal instantly, with a byte-value reference table and worked examples of the place-value math.

Electrical Converter (Watts, Amps, Volts)

Convert between watts, amps, and volts for DC, AC single-phase, and AC three-phase circuits, with power factor support and worked examples for household and industrial loads.