Go to this link and click on 'converters', then 'unit converters'...
http://www.omnis.demon.co.uk/english/conversn/convjvsc.htm?source=homepage&display=table&format=fixed&cover=beige&screen=%23FFFFFF&text=%23000000&ccover=blue&cscreen=white&ctext=%23000000&cftext=%23ffff00&lang=1®d=false&url=null&link=null&adnum=032&nav=ie5&ver=4.0%20%28compatible%3B%20MSIE%205.5%3B%20Windows%20NT%204.0%29&vermaj=4&vermin=4&jsver=1.3&bver=9&searcharg=null&jumpto=null&favpag=null
Also, of some interest.
if you have mm (say a 54mm figure) and want the scale, you do:
1717 divided by 54 equals 31,79 (so nearly 1/32)
If you have a scale (say 1/285) and want mm, you do:
1717 divided by 285 equals 6.02 (so nearly 6mm)