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 How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset. Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. Put It in a Letter A letter of instruction provides additional and more personal information regarding your estate.