MeasuringWorth is the most valuable resource on the internet. But nothing can make assigning contemporary values to historic transactions simple.
In a recent article, I wanted to assign a modern value to a £40,000.00 eighteenth century dowry and a £1,700,000.00 loan floated by a private banker to stop a crises in the London financial markets on behalf of the Bank of England during the Jacobite Revolt of 1745.
For the dowry, I chose to use the economic status value.
For the loan, I used the calculation for economic power and economic cost, which give the same result.
Perfect? Of course not. But a powerful way to give sums of money from long ago meaning for modern readers.