Metric Units
Meter
m
Centimeter
cm
Millimeter
mm
Micrometer
μm
Nanometer
nm
Imperial Units
Yard
yd
Foot, Feet
ft (')
Inch
in (")
Mil
mil
Length Conversion Reference
Metric System:
1 meter (m) = Base unit of length
1 centimeter (cm) = 0.01 m = 10 mm
1 millimeter (mm) = 0.001 m = 1000 μm
1 micrometer (μm) = 0.001 mm = 1000 nm
1 nanometer (nm) = 0.001 μm
Imperial System:
1 yard (yd) = 3 feet = 36 inches = 0.9144 meters
1 foot (ft, ') = 12 inches = 30.48 centimeters
1 inch (in, ") = 2.54 cm = 25.4 mm = 1000 mils
1 mil = 0.001 inches = 25.4 micrometers
Common References:
• Human hair width ≈ 75 micrometers
• Paper thickness ≈ 0.1 mm
• Credit card ≈ 0.76 mm
• Door height ≈ 80 inches ≈ 2 meters
• Football field ≈ 100 yards ≈ 91.44 meters