Convert meters, inches, kilograms, pounds, US volume and temperatures in Celsius, Fahrenheit and Kelvin. Select the original unit and target unit by category, and provide common combination and exchange unit functions.
Volume is measured in US units and mass in pounds and ounces. Approximations will be marked with more than 30 significant figures; temperatures below absolute zero will not be accepted.
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Shortcut key: Ctrl/⌘+Enter. Modifying inputs or options clears old results.
The temperature conversion is not only a multiplication factor, but also an offset: °C = (°F − 32) × 5 / 9.
Use US gallons, quarts and cups, not Imperial. 1 US gallon = 3.785411784 L; if the recipe uses another cup size, please check the definition first.
Length, mass and volume do not accept negative numbers. Temperatures are allowed in negative Celsius or negative Fahrenheit, but not below absolute zero: 0 K, or −273.15 °C.
Use Decimal with explicit conversion factors, displaying up to 30 significant digits; results requiring rounding are marked as approximate and not suitable as proof of calibration of metrological equipment.
The same physical quantity is first converted to the base unit and then to the target unit; the temperature uses a formula with an offset. US units in volume are marked separately and cannot be mixed with imperial units of the same name.
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