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 Deciding When to Take Social Security One of the most common questions people ask about Social Security is when they should start taking benefits. Retirement Questions That Have Nothing to Do With Money Things to consider before retirement. Women on the Rise Explore the growing influence women wield over the economy with this handy infographic.