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 Retirement Plan Detectives A couple become Retirement Plan Detectives, searching records from old employers. The Other Sure Thing Though we don't like to think about it, all of us will make an exit sometime. Are you prepared? Why Regular Rebalancing Makes Sense Without your knowing, your investment portfolio could be off-kilter.