Rule of 72 calculator

The rule of 72 is a quick mental shortcut: divide 72 by an annual return to estimate how many years money might take to double. See the estimate, how many times it could double over a period, and the resulting multiple. Illustrative, with a hypothetical rate.

Annual return (hypothetical) (%)Years to project

Years to double—

Times it doubles—

Final multiple—

Illustrative example with a hypothetical rate. Not advice or a forecast — investing involves risk, including loss of capital.

Key terms: Compound Interest · Yield