The Rule of 72 estimates the number of years required to double the amount of money invested. It assumes the principal is compounded annually. Note, accurate for interest rates below twenty percent.

Solving for annual interest rate.

annual interest rate (i) = NOT CALCULATED |

Select to solve for a different unknown

years to double investment | |

annual interest rate |

Home: PopularIndex 1Index 2Index 3Index 4Infant ChartMath GeometryPhysics ForceFluid MechanicsFinanceLoan CalculatorNursing Math

Online Web Apps, Rich Internet Application, Technical Tools, Specifications, How to Guides, Training, Applications, Examples, Tutorials, Reviews, Answers, Test Review Resources, Analysis, Homework Solutions, Worksheets, Help, Data and Information for Engineers, Technicians, Teachers, Tutors, Researchers, K-12 Education, College and High School Students, Science Fair Projects and Scientists

By Jimmy Raymond

Contact: aj@ajdesigner.com

Privacy Policy, Disclaimer and Terms

Copyright 2002-2015