Chart for converting imperial to metric up to 10 feet

Been shopping on Amazon for groundsheets and mozzie tents and frustrated by manually converting imperial to metric. There are plenty of imperial to metric conversion tables around but almost all for workshops where its converting fractional inches to millimetres for bolts, wire gauge, drill bits etc.
So I created this: https://www.scribd.com/document/3729017 ... and-inches
So I created this: https://www.scribd.com/document/3729017 ... and-inches