Special Unit Converters

Special Unit Converters gathers 31 tools for units that general converters skip. Shoppers can compare international sizes with the Shoe Size Converter, clothing and ring size tools, and printers can look up A, B and US paper formats with the Paper Size Converter. Electricians and engineers will find current, voltage, resistance, capacitance, inductance, torque, density and viscosity converters, and a Wire Gauge Converter that moves between AWG and millimetres.

Several tools explain the rules behind them. The wire gauge converter uses the ASTM B258 formula and shows the nearest metric cable size, but reminds you that safe current ratings must come from your electrical code. The viscosity converter refuses to mix dynamic and kinematic units and explains why. The Roman Numeral Converter works both ways for 1 to 3999 and suggests the standard form when you type something like IIII. Size charts vary between brands, so treat clothing and shoe results as a guide.