Unit Converter — Weight, Length, Temperature, Volume, Speed & Data

Convert weight, length, temperature, volume, speed & data storage instantly — 40+ units across 6 categories, live and bidirectional, both metric and US/imperial.

  • 6 Categories
  • 40+ Units
  • Live Bidirectional
  • 100% Private
Convert Units

Every Everyday Conversion, One Tool

Metric or imperial — this converter has both sides covered.

  • 6 Categories

    Weight, length, temperature, volume, speed, and data storage — all in one tool.

  • Live Bidirectional

    Type in either field, or swap units instantly with one click.

  • Metric & Imperial

    Every category includes both metric and US/imperial units.

  • 100% Private

    All math runs in your browser. Nothing is ever sent to a server.

Convert in Seconds

  1. 1

    Pick a Category

    Choose weight, length, temperature, volume, speed, or data storage.

  2. 2

    Choose Units & Enter a Value

    Select the From and To units, then type your value.

  3. 3

    Read the Result

    The converted value updates instantly as you type.

Frequently Asked Questions

This converter uses standard internationally-recognized conversion factors (e.g. 1 inch = 2.54 cm exactly, 1 pound = 453.592 grams) and computes results in double-precision floating point, accurate to several decimal places for virtually all everyday and professional use cases.

Yes. Each category includes both metric units (grams, meters, Celsius, liters) and US/imperial units (ounces, feet, Fahrenheit, gallons), so you can convert freely between the two systems.

This tool uses the binary convention (1 KB = 1024 bytes, 1 MB = 1024 KB, etc.), which matches how operating systems like Windows report file and storage sizes. Some manufacturers use the decimal convention (1000-based) for drive capacity, which is why a drive's "formatted" capacity can look smaller than its labeled size.

Unlike weight or length, temperature scales don't share a common zero point, so conversion requires a formula rather than a simple multiplier. Celsius to Fahrenheit is °F = °C × 9/5 + 32, and Celsius to Kelvin is simply K = °C + 273.15.

Yes. Enter a value in either the "From" or "To" field, or use the swap button to instantly flip both the units and the direction of conversion.

Common Weight Conversions

FromToResult
1 ouncegrams28.3495 g
1 poundkilograms0.453592 kg
1 kilogrampounds2.20462 lb
16 ouncesgrams453.592 g

Common Length Conversions

FromToResult
1 inchcentimeters2.54 cm
1 footmeters0.3048 m
1 kilometermiles0.621371 mi
1 milekilometers1.60934 km

Common Temperature Conversions

FromToResult
0°CFahrenheit32°F
100°CFahrenheit212°F
98.6°FCelsius37°C
0°CKelvin273.15 K

Common Data Storage Conversions

FromToResult
1 GBMB1,024 MB
1 MBKB1,024 KB
1 TBGB1,024 GB

Metric vs. Imperial: Why Two Systems Exist

Most of the world uses the metric system (grams, meters, liters, Celsius), based on powers of 10, which the International System of Units (SI) formalized for scientific and everyday use. The US customary system (ounces, feet, gallons, Fahrenheit) descends from older British imperial units and remains the everyday standard in the United States. This converter bridges both, since most conversion searches happen exactly at that boundary — recipe ounces to grams, US shoe sizes to centimeters, weather Fahrenheit to Celsius, and more.