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 What Can You Buy With 529 Distributions? This article can be a helpful guide when begin preparing for education expenses. Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable. Variable Universal Life Insurance Variable Universal Life is permanent insurance in which the policyholder directs how premiums are invested.