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 Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. To Buy or Not to Buy The decision whether to buy or rent a home may have long-term implications. Problems with Probate Probate can be a completely public process, or it can be managed to include as little information as possible.