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 Question Thank you! Oops! Related Content How Stocks Work Understanding how a stock works is key to understanding your investments. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Creative Ways to Motivate Your Employees Five creative (and inexpensive) ideas for motivating your employees.