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. Succeeding at Business Succession There are a number of reasons for business owners to consider a business succession plan sooner rather than later. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit.