Free Inflation Calculator

See how inflation erodes purchasing power over time.

Inflation compounds just like interest does, so small rate differences matter a lot over long periods. The US long-run CPI average is roughly 3%/year, but it has ranged from near 0% to over 9% in recent decades — try a few rates to see how sensitive your numbers are.

Frequently Asked Questions

What inflation rate should I use?
The long-run US average (CPI) is roughly 3% per year, though it varies significantly year to year.