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 Retirement Questions That Have Nothing to Do With Money Things to consider before retirement. Self-Employed Retirement Plans Estimate the maximum contribution amount for a Self-Employed 401(k), SIMPLE IRA, or SEP. What’s My 2024 Tax Bracket? Check out this handy reference of updated ranges from the IRS in case your designated bracket has changed.