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 Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. Tax Freedom Day Assess how many days you'll work to pay your federal tax liability. Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan.