1 pound equals 0.4536 kg (or 453.6 grams). So multiply pounds with 0.4536 to get kilograms.
One (imperial) mile equals 1.6093 km (or 1609.3 metres).
One (imperial) inch equals 2.54 cm (or 0.0254 metres).
You can view all the metric to imperial stuff over at http://convert.french-property.co.uk/ and many other websites as well.