Length & Distance

Astronomical Unit Converter

Convert AU to km, miles, light-years, parsecs, light-seconds, light-minutes, light-hours, light-days, and lunar distances with astronomy scale context.

Feet and Inches Calculator

Use a feet and inches calculator to add, subtract, multiply, or divide compound imperial lengths, enter tape-measure fractions.

Height Converter

Convert height between centimetres, metres, decimal inches, decimal feet, and feet and inches, with form-ready rounded outputs for passports, BMI tools.

Large Distance Converter

Convert long distances between km, mi, nmi, and m for travel, transport, aviation, and mapping contexts with unit context notes.

Length Converter

Convert length or distance between nanometres, micrometres, millimetres, centimetres, metres, kilometres, inches, feet, yards, miles.

Light-Year Converter

Light year converter for light year to parsec, AU, km, miles, light-travel-time checks, and hypothetical percent-of-light-speed year comparisons.

Scale Calculator

Convert representative-fraction scale measurements between drawn and real-world dimensions, or find the scale ratio from matching drawing and real measurements.

Small Measurements Converter

Convert tiny-scale lengths between µm, mm, cm, mil, and in, with high-precision output for craft, manufacturing, and science use.