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Inflation Calculator

See how inflation erodes purchasing power and what past money is worth today

Results are estimates for informational purposes only — not professional financial, medical, or legal advice. See how we build and verify our calculators.

Frequently Asked Questions

What is inflation?

Inflation is the rate at which the general price level rises over time, reducing purchasing power. If inflation is 3%, something that costs $100 today will cost $103 next year. The dollar buys less as prices rise.

What is the historical US inflation rate?

The US CPI (Consumer Price Index) has averaged about 3.1% annually since 1913. The 1970s saw high inflation (10%+). The 2021-2023 period saw post-pandemic spikes of 7-9%. The Federal Reserve targets 2% annual inflation.

How does inflation affect savings?

If your savings earn less interest than the inflation rate, you lose purchasing power. $10,000 in a 0.5% savings account during 3% inflation loses ~$250 of real value per year. This is why holding too much cash long-term is risky.

What is hyperinflation?

Hyperinflation is extremely rapid inflation, typically above 50% per month. Historical examples include Germany (1923), Zimbabwe (2008), and Venezuela (2018). It destroys savings and economic stability.

How can I protect against inflation?

Invest in assets that typically outpace inflation: stocks (historically ~7% real return), real estate, Treasury Inflation-Protected Securities (TIPS), I-Bonds (inflation-indexed savings bonds), and commodities. Holding only cash or low-yield bonds loses ground to inflation over time.

US Inflation by Decade

DecadeAvg Annual Rate
1960s2.5%
1970s7.1%
1980s5.6%
1990s3.0%
2000s2.6%
2010s1.8%
2020–20235.9%

Inflation Hedges

Stocks (equities)
Historically outpace inflation by ~7% real return annually
Real Estate
Tends to appreciate with or above inflation; rental income rises
TIPS (Treasury I-P Securities)
Principal adjusts with CPI; guaranteed inflation protection
I-Bonds
US savings bonds with rate tied to CPI; $10k/yr limit
Commodities
Gold, silver, oil — tend to rise with inflation