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 The Average American Budget Learn about the average American budget in this fun and interactive piece. Retirement Plan Detectives A couple become Retirement Plan Detectives, searching records from old employers. 9 Facts About Retirement Regardless of how you approach retirement, there are some things about it that might surprise you.