Sam Eades wrote: > > Jim Dean wrote: > > > 1 chain equals 20.1 metres. > > Hang on, David Bromage just said that it is equal to 24.07m. Which is > it? 22 x 0.9144 = 20.1168 metres. Based on the conversion 1 inch = 25.4 millimetres which is an exact conversion, I think. Barry Campbell