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 | Want to be Smarter With Your Money? Join our mailing list and get news and info to support your financial goals. First Name Last Name Email Address Thank you! Oops! Related Content The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. Tax & Estate Strategies for Married LGBTQ+ Couples Learn how to maximize your tax and estate strategy as a married member of the LGBTQ+ community. Tax Freedom Day Assess how many days you'll work to pay your federal tax liability.