Unit Converter: Metric and US Units

Converts a value into every unit of the same quantity at once: type 1 ft and see it in inches, metres, miles and nautical miles side by side. It covers the quantities the calculators work in, from length and pressure to chip load and spring rate, plus temperature, which needs an offset as well as a factor.

The factors are the calculators' own. The everyday units they never needed, such as pounds and ounces of mass, joules and BTU, km/h, bar and US and imperial gallons, are built from exact definitions, for example 1 lb = 0.45359237 kg and 1 US gal = 231 in³. Results are shown to five significant figures.

The other accessories

• Constants: Physical constants: the CODATA 2022 values from NIST
• Plot: Graph a function of x
• Numerical Lab: Integrate, differentiate and solve ODEs, with the working shown