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 Retiring Wild: National Parks and You Get ready to enjoy America’s national park system with this helpful article. What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money. Why do Renters Have to Save More? How much more would retirement cost if you owned your home rather than rented? It could actually be several times less.