US inflation calculator

The inflation calculator allows you to take any dollar amount and two years between 1800 and 2006. It then gives you an estimate of how much that money would be worth based on inflation. It calculates it both directions. So $100 in 1800 would be equivalent to $1143.21 in 2006. And $100 in 2006 would be equivalent to $8.75.

The data for the calculations comes from two US government documents, Historical Statistics of the United States and Statistical Abstracts of the United States So it is pretty accurate in it's estimates.

The Inflation Calculator