Unit Converter
Convert length, weight, temperature, area, volume, and speed with defined constants.
Enter values
Result
Convert only compatible measurements
Choose length, weight, temperature, area, volume, or speed first. The From and To lists then show only units in that category—for example, miles to kilometres or Fahrenheit to Celsius.
The conversion keeps full precision internally and formats the displayed result. US cups and fluid ounces use US customary definitions, so they are not treated as Imperial measures.
About this tool
Convert six common types of measurement. Changing category limits the unit lists to compatible measurements.
Cup and fl oz use US customary definitions. Weight and volume are not converted between each other because that would require the material's density.
Frequently asked questions
Which cup definition is used?
The volume category uses the US cup, approximately 236.588 mL.
Does temperature conversion check absolute zero?
Yes. Values below absolute zero are rejected.
Are conversion constants rounded?
Defined conversion constants are used internally; only the displayed result is formatted.
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