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 Getting a Head Start on College Savings A few strategies that may help you prepare for the cost of higher education. Principles of Preserving Wealth How federal estate taxes work, plus estate management documents and tactics. Do You Owe The AMT? If you want to avoid potential surprises at tax time, it may make sense to know where you stand when it comes to the AMT.