If you had 13 shillings in 1787 how much would that be in dollars today?

13 Shillings GBP in 1787 had the purchasing power of about £60.84 GBP today.

13 Shillings GBP in 1787 had the purchasing power of about $87.92 USD today.

NOTE - This historical conversion is the result of many calculations and considerations by a purpose designed program for which I can take no credit. The resulting answer should only be regarded as an approximation.