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 The Pros and Cons of an NUA Strategy Learn the advantages of a Net Unrealized Appreciation strategy with this helpful article. What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money. What's New for Social Security? There have been a number of changes to Social Security that may affect you, especially if you are nearing retirement.