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Content Paying Tax Later Doesn't Always Mean Paying Less 401(k) savings are taxed as ordinary income when funds are withdrawn. What to Look for in Personal Finance Apps An increasing number have been developed to help individuals with their personal finances. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.