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 Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan. Filing Final Tax Returns for the Deceased The federal government requires deceased individuals to file a final income tax return. Bull & Bear Markets: A Timeline This helpful infographic will define bull and bear markets, as well as give a historical overview.