Fiat Watch
Gas inflation calculator
Gas prices are one of the easiest ways to feel inflation. Convert an old fill-up, gallon price, or fuel budget into another year's dollars.
When to use this calculator
- Compare a historical gas price per gallon with today's dollars.
- Convert an old fill-up or monthly fuel budget across years.
- Separate general inflation from the sticker shock of gasoline prices.
Need a different amount or year? Use the full CPI inflation calculator to compare any U.S. dollar amount from 1913 through 2026.
Example searches
These examples all use annual CPI-U data from the U.S. Bureau of Labor Statistics.
Frequently asked questions
- How do I calculate gas price inflation?
- Enter the gas price or fuel spend, choose the original year, and pick the target year. The result shows the CPI-U adjusted value.
- Is this a gasoline-only inflation index?
- No. This calculator uses all-items CPI-U. For actual BLS average gas prices, use Fiat Watch's historical gas cost pages.
- Can I compare a full tank instead of a gallon price?
- Yes. Enter the total fill-up cost as the amount and compare it between years.
Historical prices
Browse BLS average price pages for item-specific year comparisons.