Purchasing power how much real stuff a unit of money can buy. Where it's taught What Is Money & InflationReal Returns: What Your Money Is Actually Earning Try it with a calculator Inflation CalculatorReal Returns Calculator Appears in 6 other lessons The Rule of 72: How Fast Does Money Double?Present Value: Should You Take the Lump Sum or the Payments?Bank Accounts: Where Your Cash Should Actually SitTwo Job Offers: Compare Total Comp, Not SalarySavings Rate: The Shockingly Simple Math of Early RetirementBehavioral Finance: Why We Sell at the Bottom Related terms InflationReal returnBreak-even returnNominal returnNominal valueReal value