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. Related Content Eight Mistakes That Can Upend Your Retirement There are common mistakes you can avoid when saving for retirement. What Can You Buy With 529 Distributions? This article can be a helpful guide when begin preparing for education expenses. What If Your Kids Decide Against College? Rising college costs prompt students to seek alternatives; 529 account funds can be used for other education options.