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 | Related Content Infographic: Who Sits at Your Table? Infographic: Who Sits at Your Table? My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Insurance Needs Assessment: Married With Children When you’re married and have children, insurance needs will be different.