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. Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Assess Life Insurance Needs How to help determine life insurance needs to provide for your family after you pass away. Principles of Preserving Wealth How federal estate taxes work, plus estate management documents and tactics. The Big Picture– Cracking Open a Six Pack Knowing your risks is essential when making investment decisions and exit decisions.