Inflation Calculator – Cumulative CPI & Purchasing Power Loss
Understanding Inflation and Purchasing Power
Inflation represents the gradual rise in prices of goods and services over time, which reduces the real purchasing power of cash savings. Over a 20-year span at historical average inflation rates (2.5% to 3.5%), the real purchasing power of uninvested currency is cut almost in half.
How the Calculation Works
The equivalent future cost uses the compounding formula: Future Value = Present Value × (1 + Inflation Rate)^Years. This illustrates why long-term wealth preservation requires investment returns that exceed the prevailing Consumer Price Index (CPI).
Frequently asked questions
What is cumulative inflation?
Cumulative inflation measures the total percentage increase in price levels across an entire multi-year period rather than a single annual rate.
Why does cash lose value over time?
When the money supply expands faster than the production of goods and services, each unit of currency buys a smaller basket of commodities.