Doubling Your Money This calculator demonstrates the power of compound interest. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Related Content Keeping Up with the Joneses Lifestyle inflation can be the enemy of wealth building. What could happen if you invested instead of buying more stuff? How to Read Your Credit Report Solve a mystery while learning how important your credit report is with this story-driven interactive. Historical Inflation This calculator shows how inflation over the years has impacted purchasing power.