Unit Converters Tools

Unit Converter opens this category because unit conversion is the calculation most people trust themselves not to need — right up until they order 50 feet of cable in a metric country, or paste a kilogram figure into a recipe that expects pounds. The tool covers four measurement families in one place: length (mm to miles), weight (mg to tonnes), volume (ml to gallons), and temperature (Celsius, Fahrenheit, Kelvin, Rankine). Each domain lives on its own tab. Temperature Converter sits here from the Math & Calc category: it covers the Rankine scale that most single-purpose tools ignore, because an engineer reading a datasheet in an old US standard should not have to derive the formula from scratch. Both tools run entirely in the browser with nothing uploaded.