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 Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan. Who Is Your Trusted Contact? This investment account question is vital and answered as early as possible. The Value of Planning as Retirement Approaches Don’t wait until you’ve reached the point where you feel pressured to make major retirement decisions.