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? U.S. Personal Savings Rate What can be learned from the savings rate? Historical Inflation This calculator shows how inflation over the years has impacted purchasing power.