Magnet Wire

To - anyone who lives in the uk,
                                               if you live in the uk you may
have heard of a largely mail order electronics supplier called maplins, if you
have a catalogue look up the enamel wire section, they sell 250g reels of
enamel copper 22 swg wire, which they reckon is about 1.5 Km i.e - enough to
wind an 8" * 50" coil for arounf 5, that's cheap... or wrong, does anyone know
how much 1m of copper wire weighs? or knows the density of copper?