nmnanometre1,000,000,000,000
μmmicrometre1,000,000,000
mmmillimetre1,000
cmcentimetre100
kmkilometre0.001
ininch39.370079
ftfoot3.2808399
ydyard1.0936133
mimile0.00062137119
nminautical mile0.0005399568
lylight year1.056971e-16
auastronomical unit6.684492e-12