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. Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content Can I Refinance My Mortgage? This calculator can help determine whether it makes sense to refinance your mortgage. Retirement Questions That Have Nothing to Do With Money Things to consider before retirement. Changing Unhealthy Behaviors Five phases to changing unhealthy behaviors.