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 My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Estimating the Cost of College This worksheet can help you estimate the costs of a four-year college program. The Richest Man in Babylon In good times and bad, consistently saving a percentage of your income is a sound financial practice.