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 A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government. Estate Management Checklist Is your estate in order? This short quiz may help you assess your overall strategy. Principles of Preserving Wealth How federal estate taxes work, plus estate management documents and tactics.