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 Social Security: Maximizing Benefits There are other ways to maximize Social Security benefits, in addition to waiting to claim them. Retirement Plan Choices for Small Businesses Retirement choices can be intimidating. Picking the right strategy. Retirement Savings Essentials in your 30s Your 30s are the best time to set yourself up for retirement savings success. Here are strategies to help you.