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 Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA. Four Really Good Reasons to Invest There are four very good reasons to start investing. Do you know what they are? To Buy or Not to Buy The decision whether to buy or rent a home may have long-term implications.