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. Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Please Leave Home Without It Concerns over identity theft continue to grow, especially with data breaches at major companies and financial institutions. Travel, Without the Baggage Tips to avoid checking in luggage on your next vacation. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit.