Identify an unfamiliar measurement.
Unit Conversion Guide
Choose a dedicated converter for length, weight, area, volume, temperature or pressure. Find the right tool from the units on your label or specification.
Start here
Identify the unit printed next to the value.
Browser-first
Measurements are calculated locally in your browser and are not uploaded or stored on a server.
Useful for
Identify an unfamiliar measurement
Length Converter
Convert inches to centimeters, feet to meters, and miles to kilometers. Swap units, use common presets, and copy the result without signing in.
Open converter →Weight Converter
Convert pounds to kilograms, ounces to grams, and metric tonnes to kilograms. Includes clearly labeled Taiwanese units and a copyable result.
Open converter →Area Converter
Convert square feet to square meters, acres to hectares, and other area units. Check property and land measurements with worked examples.
Open converter →Volume Converter
Convert US cups to milliliters, gallons to liters, and cubic meters to liters. US customary, Imperial and metric cup definitions are labeled separately.
Open converter →Temperature Converter
Convert Fahrenheit to Celsius and Kelvin with instant results, common temperature presets, and checks against values below absolute zero.
Open converter →Pressure Converter
Convert PSI, bar, kPa, kgf/cm² and atmospheres instantly. Compare pressure units on gauges, tires and equipment without changing the pressure reference.
Open converter → Quick answer
Unit Conversion Guide: start with the unit on your label
Start with the unit symbol: in and cm describe length; lb and kg describe weight; ft² and m² describe area; fl oz and mL describe volume. Each link opens a dedicated converter.
Conversions between different kinds of quantities need more information, such as density for volume to mass.
Length: Convert inches to centimeters, feet to meters, and miles to kilometers. Swap units, use common presets, and copy the result without signing in.
About this tool
Choose a dedicated converter for length, weight, area, volume, temperature or pressure. Find the right tool from the units on your label or specification.
Measurements are calculated locally in your browser and are not uploaded or stored on a server.
How to use it
- Identify the unit printed next to the value.
- Choose the matching converter below.
- Enter your measurement on the dedicated page.
Common use cases
- Identify an unfamiliar measurement
- Choose a converter for a product specification
- Separate weight from volume
How the conversion works
Start with the unit symbol: in and cm describe length; lb and kg describe weight; ft² and m² describe area; fl oz and mL describe volume. Each link opens a dedicated converter.
For a 12-inch item choose length; for a 16 fl oz bottle choose volume; for a 2 lb package choose weight.
Check before using the result
Conversions between different kinds of quantities need more information, such as density for volume to mass.
Reference sources
FAQ
Where is the all-in-one converter?
Its length, weight, area and volume options now have dedicated pages. Temperature and pressure converters are available from the same guide.
Which converter handles fluid ounces?
Use Volume Converter for fluid ounces and Weight Converter for ordinary ounces.
Are measurements uploaded?
No. All calculations run locally in your browser without an account.