1 inch is equal to 25.4 millimetres. Therefore, 28 millimetres is equal to 28 / 25.4 = 1.10 inches, accurate to two decimal places.
Direct Conversion Formula 28 mm*
1 in
25.4 mm
=
1.102362205 in
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28mm will be the outside diameter. In the UK, depending on what BS standard the pipe is designed to, the thickness of the copper will be either 0.9mm or 1.2mm, the same as for 22mm pipe. assuming to thicker later type, then the internal diameter would be 28mm - (2*1.2mm) = 25.6mm
28mm equates to 0.0919 feet.
it is about 46 inches
36 inches
2.13 inches