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 Four Steps to Valuing an Estate Determining the value of your estate, or for someone who has passed away, can be a complex undertaking. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. Long-Term-Care Needs Determine your potential long-term care needs and how long your current assets might last.