A fafsa estimator can help you to know the exact grant amount that you are eligible to get. FAFSA is an aid that is usually given to students who belong to poor background and do not have the capability to pay their education expenses. This grant money is given for higher studies in universities and colleges. In order to get this grant one needs to make an application and understands how it works. If you wish to apply for this grant, then you need to fill up the online form or the offline ones that you can get from the FAFSA offices. There is a deadline for applying this grant and once the deadline is crossed you cannot apply for the grant anymore in that year. It is suggested to file the grant no sooner the date of application starts, so that in case of rejection you can have time in hand for reapplication.