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 Question Thank you! Oops! Related Content Eight Mistakes That Can Upend Your Retirement There are common mistakes you can avoid when saving for retirement. Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan. Inflation & Your Money It's important to understand how inflation is reported and how it can affect investments.