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 Question Thank you! Oops! Related Content Revising Estate Strategy Assumptions Estate tax exemptions rules appear to be stabilizing, prompting many to reconsider conventional estate strategies. Thanks, Mom! When it comes to managing your personal finances, there’s plenty of complex advice out there. But often, simpler is better. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.