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 A Bucket Plan to Go with Your Bucket List Longer, healthier living can put greater stress on retirement assets; the bucket approach may be one answer. Estimating the Cost of College This worksheet can help you estimate the costs of a four-year college program. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.