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 Message Thank you! Oops! Related Content Net Unrealized Appreciation (NUA) Explained Have you considered the special tax treatment on company stock held in a 401(k) plan? The Long Run: Women and Retirement For women, retirement strategy is a long race. It’s helpful to know the route. 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.