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 Message Thank you! Oops! Related Content Three Key Questions to Answer Before Taking Social Security When to start? Should I continue to work? How can I maximize my benefit? Eight Mistakes That Can Upend Your Retirement There are common mistakes you can avoid when saving for retirement. A Fruitful Retirement: Social Security Benefit Taking your Social Security benefits at the right time may help maximize your benefit.