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 Your Changing Definition of Risk in Retirement A change in your mindset during retirement may drive changes to your portfolio. Rollover Unused 529 Funds to a Roth IRA The SECURE Act 2.0 created a provision that allows unused funds from a 529 college savings account to rollover to a Roth IRA. What Is a 1035 Exchange? 1035 exchanges provide a way to trade-in an annuity contract or life insurance policy without triggering a tax liability.