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 401(k) Plans Are Not Just for Big Businesses Many small businesses are one person businesses. Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate. It May Be Time for a Financial Checkup It’s never a bad time to speak with your financial professional about changes in your situation.