\begin{definition}[Definition:Avoirdupois/Ton]
The '''ton''' is an avoirdupois unit of mass.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''ton'''
}}
{{eqn | r = 20
      | c = hundredweight
}}
{{eqn | r = 80
      | c = quarters
}}
{{eqn | r = 160
      | c = stone
}}
{{eqn | r = 2240
      | c = pounds avoirdupois
}}
{{eqn | o = \approx
      | r = 1016
      | c = kilograms
}}
{{end-eqn}}
\end{definition}