Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content The Power of Compound Interest Learn how to harness the power of compound interest for your investments. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Diversification, Patience, and Consistency Three important factors when it comes to your financial life.