# Online Unit Converter

This site is intended to be a valuable and efficient tool which provides an easy and convenient way to calculate and convert between the various units of measurement and within different systems. Its purpose is not only to facilitate the process of finding the most common conversions, but also to provide facts and additional information which can be useful and practical, as well as entertaining and interesting.

A unit is a definite value of a quantity used as a standard or reference to describe a physical quantity based on observations and defined by law, tradition or convention. Quantities of the same kind can be expressed as multiples of the particular unit. A single unit is a type of measurement and typically is understood as a measure of 1.

Historically, multiple unit systems of measurement were created and used in different regions and cultures. Those systems represent a group or collection of units of measurement and rules relating them to each other. The global modern standard of measurement is the International System of Units (abbreviated SI, from the French Système international d’unités), which is an updated form of the metric system. Although the SI is designed for global use, it has not been fully adopted, some other systems of measurement such as The system of Imperial units or the United States customary units, are still used in some parts of the world. Yet, the SI is the most commonly used measurement system in various fields such as science, industry, medicine and of course day-to-day life. It comprises of seven base units:

• the kilogram (kg), for mass
• the second (s), for time
• the kelvin (K), for temperature
• the ampere (A), for electric current
• the mole (mol), for the amount of a substance
• the candela (cd), for luminous intensity
• the meter (m), for distance
Other units are derived from those base units.

## Unit Conversion Tools

Acres, Hectares, Square Centimeters, Square Feet, Square Inches, Square Kilometers, Square Meters, Square Miles, Square Yards
Astronomical Units, Kilometers, Light Minutes, Light Seconds, Light Years, Miles, Parsecs
Forties, Beers, Bombers, Cases, Ounces, Frisbees Full, Gallons, Growlers, Half Kegs, Imperial Pints, Kegs, Liters, Pints, Quarts, Six Packs
Cups of butter, Fluid Ounces, Grams of Butter, Half Sticks, Imperial Cups, Ounces of Butter, Quarter Sticks, Sticks, Tablespoons, Teaspoons
Bytes, Bits, Gigabytes, Kilobytes, Megabytes, Megabits, Petabytes, Terabytes
BTUs, calories, Ergs, Gallons of Gas, Joules, Kilocalories, Kilojoules, Kilowatt Hours
U.S. MPG, British MPG, Liters per 100 km, Kilometers per Liter
Angstroms, Centimeters, Fathoms, Feet, Furlongs, Inches, Kilometers, Meters, Miles, Microns, Millimeters, Nautical Leagues, Nanometers, Nautical Miles, Picometers, Land Leagues, Yards
BTUs per Hour, Gigawatts, Mechanical Horsepower, Metric Horsepower, Kilowatts, Megawatts, Tons of Refrigeration, Watts
Atmospheres, Bars, Inches of Mercury, Millibars, Pascals, Pounds per Square Inch, Torrs
Arabic Numerals, Roman Numerals
Hourly Wage, Yearly Salary
Celsius, Fahrenheit, Kelvin
Centimeters per Second, Feet per Second, Kilometers per Hour, Knots, Mach, Meters per Second, Miles per Hour
Days, Centuries, Decades, Hours, Millenia, Minutes, Months, Milliseconds, Nanoseconds, Seconds, Weeks, Work Weeks, Years
Barrels of Oil, Cubic Centimeters, Cubic Feet, Cubic Inches, Cups, Ounces, Gallons, Imperial Gallons, Imperial Pints, Liters, Cubic Meters, Milliliters, Pints, Quarts, Tablespoons, Teaspoons
Pennyweight, Grams, Grains, Kilograms, Troy Pounds, Pounds, Long Tons, Metric Tons, Milligrams, Ounces, Troy Ounces, Short Tons, Stone
Balthazars, Bottles, Ounces, Glasses, Half Bottles, Imperials, Jeroboams, Liters, Methuselahs, Magnums, Midases, Milliliters, Nebuchadnezzars, Rehoboam, Salmanazars, Splits

## Unit Conversion Calculator

Convert from centimeters to feet and inches and from feet and inches to centimeters