1 ch | 66 feet | 22 yards | 20.12 meters | 2012 cm (centimeters)

1 ft | 0.01515 ch 1 yd | 0.04545 ch 1 m | 0.04971 ch 1 cm | 4.971×10^-4 ch

length

distance

width

height

thickness

depth

radius

diameter

wavelength

perimeter

characteristic length

circumference

position

breadth

arc length

displacement

radial distance

semi-principal axis length

atomic radius

angular wavelength

mean free path

Cartesian coordinate

displacement vector

UK imperial | US Customary System (USCS) | US customary length | US linear | international yard and pound agreement

Light travel time t in vacuum from t = x/c: | 67 ns (nanoseconds)

Light travel time t in an optical fiber t = 1.48x/c: | 99 ns (nanoseconds)

Sound travel time t from t = x/v: | 59 ms (milliseconds) | (assuming speed of sound ≈ 340 m/s)

Distance to horizon (ignoring topography and other obstructions) from this height: | 9.954 miles | 16.02 km (kilometers) | 16019 meters

Angular wavelength ƛ from ƛ = λ/(2π): | 3.202 meters

Frequency ν of electromagnetic radiation in a vacuum from ν = c/λ: | 15 MHz (megahertz)

Frequency ν of sound from ν = v/λ: | 17 Hz (hertz) | (assuming speed of sound ≈ 340 m/s)

Spectroscopic wavenumber ν^~ from ν^~ = 1/λ: | 5×10^-4 cm^(-1) (reciprocal centimeters) | 5×10^-4 wavenumbers

Wavenumber k from k = 2π/λ: | 0.003123 cm^(-1) (reciprocal centimeters)

Corrresponding angle θ around the earth's equator from θ = s/a_ earth : | 3.2 μrad (microradians) | 1.807×10^-4° (degrees) | 0.6506" (arcseconds)

Wavelength λ from λ = 2πƛ: | 126.4 meters

Frequency ν of a photon in a vacuum from ν = 2πc/ƛ: | 93.64 MHz (megahertz)

Spectroscopic wavenumber ν^~ from ν^~ = 2π/ƛ: | 0.3123 m^(-1) (reciprocal meters)

Wavenumber k from k = 1/ƛ: | 0.05 m^(-1) (reciprocal meters)

≈ 0.7 × typical length of a blue whale ( ≈ 30 m )

= length of a cricket pitch ( 22 yd )

≈ 0.39 × height of Nelson's column including the statue ( ≈ 169.3 ft )

≈ 0.69 × highest measured ocean wave during a tsunami ( ≈ 29 m )

≈ 6 × story ( 9 to 14 ft )

≈ 0.49 × diameter of the Hindenburg Zeppelin ( 41.18 m )

≈ (1 to 1000) × wavelength of an audible sound to a human ( 5×10^-5 to 0.05 speed of sound/Hz )