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? What to Look for in Personal Finance Apps An increasing number have been developed to help individuals with their personal finances. Your Cash Flow Statement A presentation about managing money: using it, saving it, and even getting credit.