Conversion Calculator

Convert between hundreds of units including length, weight, volume, temperature, area, speed, time, data, pressure, and energy.

Your Input

Enter a value and select units to see the conversion result with detailed step-by-step solution.

Complete User Guide

What is Unit Conversion?

Unit conversion is the process of converting a measurement from one unit to another while maintaining the same quantity. This calculator supports conversions across 10 major categories with hundreds of units, using internationally recognized conversion factors for accuracy.

How to Use This Calculator

  1. Select the conversion type from the dropdown (Length, Weight, Volume, Temperature, Area, Speed, Time, Data, Pressure, or Energy).
  2. Enter the value you want to convert.
  3. Select the unit you are converting from.
  4. Select the unit you want to convert to.
  5. Click 'Convert' to see the result with step-by-step solution.
  6. Use Reset to clear and hide results.

Conversion Categories

Length

Meters, kilometers, miles, yards, feet, inches, nautical miles

Weight/Mass

Kilograms, grams, pounds, ounces, tons, stones

Volume

Liters, gallons, cubic meters, cubic feet, cubic yards

Temperature

Celsius, Fahrenheit, Kelvin

Area

Square meters, square feet, acres, hectares

Speed

km/h, mph, m/s, knots, Mach

时间

Seconds, minutes, hours, days, weeks, months, years

Data

Bytes, KB, MB, GB, TB, PB, bits

Pressure

Pascals, PSI, bar, atmosphere, torr

Energy

Joules, BTU, kWh, calories, foot-pounds

Important Notes

  • All conversions use internationally recognized conversion factors and are accurate to 10 decimal places.
  • Temperature conversions use precise formulas: Celsius to Fahrenheit: F = C × 9/5 + 32.
  • Data conversions use binary (1024) base for bytes, kilobytes, megabytes, etc.
  • Negative values are only allowed for temperature conversions.

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