How much would that be today?

Is a question I am often asked whether it be with regard to people in 1815 who paid the income tax (they had to earn £60 per annum or more) or the amount Gladstone agreed to pay over the Alabama Incident. I can usually do the sums in my head in no time but just in case I can't this website should help. Let me know if you understand it as I'm not sure I do.