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 Interested in a Fuel Efficient Car? Estimate how many months it may take to recover the out-of-pocket costs when buying a more efficient vehicle. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Financial Hacks for Millennials: Don’t Get Burnt With FIRE Financial Independence, Retire Early (FIRE), also known as radical savings, encourages aggressive saving to retire by age 40.