Finance

Inflation Calculator

See how inflation erodes purchasing power and how much future dollars are worth in today's money.

Formula:
Future Value = Amount × (1 + rate)^years
Purchasing Power = Amount / (1 + rate)^years
Rule of 72: Years to halve = 72 / inflation%

Understanding Inflation

Inflation is the rate at which prices increase over time, reducing your money's purchasing power. At 3% inflation, $100 today buys only about $55 worth of goods in 20 years.

Historical US Inflation

PeriodAvg Annual Inflation
1950–2024 (Long-term avg)3.5%
2010–2019 (Low inflation era)1.8%
2021–2023 (Post-COVID)5.5%+
2024~3.0%

Why It Matters for Retirement

If you need $5,000/month today and plan to retire in 25 years, at 3% inflation you'll need about $10,450/month to maintain the same lifestyle. This is why your investments need to outpace inflation.