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. Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. How Stocks Work Understanding how a stock works is key to understanding your investments.