Unit Converter
Convert between hundreds of units across length, weight, temperature, time, area, volume, speed, power, energy, pressure, data, and angle categories. Inputs accept fractions, mixed numbers, and scientific notation in addition to standard decimals, and all selections persist between sessions.
This tool sends nothing over the network. Everything you enter is processed on your device and never reaches our servers.
Documentation
The unit converter switches a value between hundreds of units across twelve measurement categories: Length, Weight, Temperature, Time, Area, Volume, Speed, Power, Energy, Pressure, Data, and Angle, covering in one place what would otherwise require a dozen separate conversion references.
- Values accept whole numbers (42), decimals (3.14), fractions (3/4), mixed numbers (5 1/16 or 1-3/8), and scientific notation (1.5e3).
- The result is computed from the conversion ratio between the two selected units within a category, with an optional step-by-step view that shows that formula and the substituted arithmetic.
- A swap control reverses the source and target units without re-selecting either one, useful for checking a round-trip conversion.
- Settings holds the display precision, from 2 to 10 decimal places, applied consistently regardless of which of the twelve categories is active.
Length conversions run through meters as the base unit. Converting 5 1/2 feet to meters: 5.5 feet x 0.3048 meters per foot = 1.6764 meters, since 1 foot is defined as exactly 0.3048 meters. The same category handles the reverse just as directly: 1.6764 meters divided by 0.3048 returns the original 5.5 feet, the kind of round-trip check the swap control makes quick. Temperature is the one category built on an additive offset rather than a ratio: converting 98.6 degrees Fahrenheit (average human body temperature) to Celsius subtracts 32 first and then scales by 5/9, giving (98.6 - 32) x 5/9 = 37.0 degrees Celsius.
Unit conversion is essential across many fields, from academic study to professional engineering and everyday life. This converter handles all major measurement categories in a single interface, eliminating the need for separate tools.
- Education: Verify homework calculations in physics, chemistry, or engineering by converting between metric and imperial units. Enter values like 5 1/2 feet to see the equivalent in meters.
- Construction: Convert measurements between inches, centimeters, feet, and meters when working with international materials, to keep cuts and specifications accurate.
- Cooking: Convert between cups and milliliters, ounces and grams, or Fahrenheit and Celsius when following recipes from different countries.
- Science: Convert between units of pressure (pascals to atmospheres), energy (joules to calories), or data storage (megabytes to gigabytes) during experiments and data analysis.
- Travel: Convert between miles and kilometers for distance, pounds and kilograms for luggage weight, or Fahrenheit and Celsius for weather forecasts.
- Engineering: Convert power units (watts to horsepower), speed units (meters per second to miles per hour), or angle measurements (degrees to radians) for design calculations.
- Fitness: Convert body weight between pounds and kilograms, running distances between miles and kilometers, or pool lengths between yards and meters.
- E-commerce: Convert product dimensions and weights between metric and imperial systems to comply with different marketplace listing requirements when shipping internationally.
- Data Management: Convert between bits, bytes, kilobytes, megabytes, gigabytes, and terabytes when planning storage capacity, estimating transfer times, or documenting infrastructure requirements.
Inputs, outputs, and what the Unit Converter computes
What the Unit Converter asks for and what it returns, as a plain list. Defaults, units, and ranges are the ones the form loads with.
Inputs
- Category · default: Length
- Value (text input) · default: 1
- From
- To
- Decimal Places · default: 4
- Show step-by-step formula · default: off
Controls
Convert · Reset
Example
Converting 5 1/2 feet to meters: 5.5 feet x 0.3048 meters per foot = 1.6764 meters, since 1 foot is defined as exactly 0.3048 meters.