« Reply #17 on: Monday 04 June 12 23:26 BST (UK) »
Unfortunately none of the conversion sites will give accurate values, there are too many variables.
One may as well pluck any number out of thin air.
Such sites are good for specific economic calculations but have no real relevance for the family historian. 
Cheers
Guy
.
makes good reading though

Aberdeen: Findlay-Shirras,McCarthy: MidLothian: Mason,Telford,Darling,Cruikshanks,Bennett,Sime, Bell: Lanarks:Crum, Brown, MacKenzie,Cameron, Glen, Millar; Ross: Urray:Mackenzie: Moray: Findlay; Marshall/Marischell: Perthshire: Brown Ferguson: Wales: McCarthy, Thomas: England: Almond, Askin, Dodson, Well(es). Harrison, Maw, McCarthy, Munford, Pye, Shearing, Smith, Smythe, Speight, Strike, Wallis/Wallace, Ward, Wells;Germany: Flamme,Ehlers, Bielstein, Germer, Mohlm, Reupke