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 Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions. Tuning Your Social Security Benefit When should you take your Social Security benefit? The Cost of Procrastination Procrastination can be costly. When you get a late start, it may be difficult to make up for lost time.