Unit Converter

Unit conversion is one of the most fundamental operations in science, engineering, and everyday life. Whether you are a software developer working with data storage sizes, an engineer calculating structural measurements, a cook converting recipe quantities, or a traveler adapting to a different measurement system, having a reliable unit converter at your fingertips saves time and prevents costly errors. This tool provides instant, accurate conversions across eight major categories of measurement with live results as you type.

Length and Distance

The metric system uses millimeters, centimeters, meters, and kilometers as its primary units of length. The imperial system uses inches, feet, yards, and miles. The nautical mile, used in maritime and aviation contexts, is defined as exactly 1,852 meters. Converting between these systems is essential in international trade, construction, and scientific research. One inch equals exactly 25.4 millimeters, and one mile equals approximately 1.609 kilometers.

Data Storage Units

In computing, data is measured in bits and bytes. A byte consists of 8 bits. The confusion between decimal (SI) and binary (IEC) prefixes is a common source of error. In the SI system, 1 kilobyte (KB) = 1,000 bytes, while in the binary system, 1 kibibyte (KiB) = 1,024 bytes. Hard drive manufacturers typically use SI units, while operating systems and memory manufacturers often use binary units. This converter supports both standards, helping you understand the real capacity of storage devices and network bandwidth specifications. At the upper end, a petabyte equals 1,000 terabytes in SI or 1,024 tebibytes in binary notation.

Temperature Scales

Three temperature scales are in common use. Celsius, used worldwide for weather and everyday temperatures, sets water's freezing point at 0 degrees and boiling point at 100 degrees. Fahrenheit, still used in the United States, sets these at 32 and 212 degrees respectively. Kelvin, the SI unit for thermodynamic temperature, starts at absolute zero (0 K = -273.15 degrees Celsius) and uses the same increment size as Celsius. The formulas are: F = C x 9/5 + 32, C = (F - 32) x 5/9, and K = C + 273.15.

Weight and Mass

The metric system measures mass in milligrams, grams, kilograms, and tonnes (metric tons). The imperial system uses ounces, pounds, and stones. One kilogram equals approximately 2.205 pounds, and one pound equals 16 ounces. The stone (14 pounds) is still used in the UK and Ireland for body weight. In scientific contexts, mass is strictly measured in kilograms, while weight is a force measured in newtons, though colloquially the terms are used interchangeably.

Speed, Time, Area, and Volume

Speed conversions between meters per second, kilometers per hour, miles per hour, and knots are essential for transportation and physics. Time conversions help developers working with milliseconds, seconds, and larger intervals. Area and volume conversions bridge the gap between metric and imperial systems for real estate, construction, cooking, and laboratory work. A US gallon differs from a UK (imperial) gallon, which is approximately 20% larger, a distinction this converter handles correctly.

100% Client-Side Processing

All unit conversions are performed entirely in your browser using JavaScript arithmetic. No values or data are transmitted to any server. This makes the tool fast, private, and available offline once loaded. All conversion factors are sourced from international standards bodies including BIPM (Bureau International des Poids et Mesures) and NIST (National Institute of Standards and Technology).