Definition:Imperial/Length
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Definition
The imperial units of length are as follows:
Mil
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | mil | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle \dfrac 1 {1000}\) | inch | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 25 \cdotp 4\) | microns | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 0 \cdotp 0254\) | millimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 2 \cdotp 54 \times 10^{-5}\) | metres |
Inch
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | inch | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 2 \cdotp 54\) | centimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 0 \cdotp 0254\) | metres |
This definition is exact, and is how the imperial unit of length is defined.
Foot
The foot is the FPS base unit of length.
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | foot | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 12\) | inches | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 30.48\) | centimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 0 \cdotp 3048\) | metres |
Yard
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | yard | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 3\) | feet | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 36\) | inches | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 91 \cdot 44\) | centimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 0 \cdotp 9144\) | metres |
Rod, Pole or Perch
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | rod, pole or perch | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 5 \tfrac 1 2\) | yards | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 16 \tfrac 1 2\) | feet | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 502 \cdot 92\) | centimetres | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 5 \cdotp 0292\) | metres |
Chain
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | chain | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 4\) | rods, poles or perches | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 22\) | yards | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 66\) | feet | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 20 \cdotp 1168\) | metres |
Furlong
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | furlong | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 10\) | chains | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 40\) | rods, poles or perches | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 220\) | yards | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 660\) | feet | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 201 \cdotp 168\) | metres |
International Mile
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | (international) mile | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 8\) | furlongs | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 80\) | chains | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 320\) | rods, poles or perches | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 1760\) | yards | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 1609 \cdotp 344\) | metres (exactly) |
League
\(\displaystyle \) | \(\) | \(\displaystyle 1\) | league | ||||||||||
\(\displaystyle \) | \(\) | \(\displaystyle 3\) | (international) miles | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 5280\) | yards | ||||||||||
\(\displaystyle \) | \(\approx\) | \(\displaystyle 2\) | leuca | ||||||||||
\(\displaystyle \) | \(\approx\) | \(\displaystyle 3000\) | paces | ||||||||||
\(\displaystyle \) | \(=\) | \(\displaystyle 4828 \cdotp 032\) | metres (exactly) |