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 Understanding Marginal Income Tax Brackets An inside look at how marginal income tax brackets work. Ask a Financial Professional: I Got a Big Raise. Now What? You got a pay raise – what should you do with it? Find tips on how to avoid tax surprises and lifestyle creep, and why paying What to Look for in Personal Finance Apps An increasing number have been developed to help individuals with their personal finances.