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 Question Thank you! Oops! Related Content The Great Debate Continues: Active vs. Passive In investments, one great debate asks the question, “Active or Passive Investing: Which Is Better?” Is it Too Late to Plan for Retirement? These financial strategies can get you on track even if it feels too late to plan for retirement. A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government.