For retirement planning, it is useful to know approximately how much you will receive monthly from Social Security when you stop working. The Social Security Quick Calculator estimates your monthly benefit when you retire based on your age and employment earnings history. The calculator allows you to adjust for early or late retirement. The Social Security Retirement Estimator gives you an estimate of Social Security monthly benefits based on your your actual Social Security earnings record. 

Go to the Social Security Quick Calculator
Go to the Social Security Retirement Estimator