21 Millimeters to Kilometers

Convert 21 millimeters (mm) to kilometers (km) with formulas, examples, and conversion tables.

mm
km
21 millimeters (mm) = 2.1e-5 kilometers (km)
Round to:
km + Meters:0.021 m
Step-by-Step Solution
1Write the conversion factor:
1 kilometer = 1000000 millimeters
2Divide the value by the conversion factor:
21 ÷ 1000000 = 2.1e-5
3Result:
21 millimeters (mm) = 2.1e-5 kilometers (km)
↔ Kilometers to Millimeters

Millimeters to Kilometers Conversion Table

MillimetersKilometers
1 mm1e-6 km
2 mm2e-6 km
3 mm3e-6 km
4 mm4e-6 km
5 mm5e-6 km
10 mm1e-5 km
20 mm2e-5 km
21 mm2.1e-5 km
50 mm5e-5 km
100 mm0.0001 km

21 Millimeters in Other Units

Unit21 mm =
Millimeters to Kilometers2.1e-5 km
Millimeters to Meters0.021 m
MM to CM2.1 cm
Millimeters to Micrometers21000 μm
Millimeters to Nanometers21000000 nm
Millimeters to Miles1.3048795037e-5 mi
Millimeters to Yards0.0229658792651 yd
Millimeters to Feet0.0688976377953 ft
MM to Inches0.826771653543 in
Millimeters to Nautical Miles1.13390928726e-5 nmi
Millimeters to Fathoms0.0114829396325 ftm
Millimeters to Light Years2.21963851601e-18 ly
Millimeters to Astronomical Units1.40374331551e-13 AU
Millimeters to Parsecs6.80492546986e-19 pc
Millimeters to Angstroms210000000 Å
Millimeters to Planck Lengths1.29929992483e33 ℓP
Millimeters to Rods0.00417561441183 rd

Related Conversions

5 mm to km10 mm to km20 mm to km2.1e-5 km to mmKilometers to Millimeters ConverterMillimeters to Kilometers Converter