Free calculator programs from SupertutorTV!

5 Free TI-84 Hacks: Calculator Programs For the ACT
Photo credit:  Flickr/Jorge Franganillo

Want to save time and improve your score on the ACT? Hack your TI-84 with these free calculator programs written for the ACT guidelines. These programs were designed for use with a TI-84. Just a heads up: though they may work on other TI series calculators, they will not work on TI-Nspire calculators or other brands.

Keep reading for instructions on downloading our calculator programs package.

***Disclaimer for these Calculator Programs***

We at Supertutor have worked hard to provide you with useful calculator programs that to the best of our interpretation adhere to the ACT’s guidelines, but we cannot guarantee that our interpretation of the ACT’s guidelines are the same as those of ACT itself. You are responsible for adhering to all ACT policies on test day. That said, we hope that these programs will help you when it comes time to take your test.


When it comes to test day, you’ll need every tool in your tool belt to get the score you need. That’s why calculator programs are important to consider before taking your test.

Calculator programs can

  •      save precious time when answering questions
  •      remember formulas so you won’t forget
  •      check your work if you are uncertain of your answer

However, the ACT has some rules regarding what programs are and aren’t allowed. The rules are a bit ambiguous, which can lead to frustration when choosing which programs to bring.

The following excerpt from the ACT’s website explains what constitutes an acceptable program on the ACT.

Q9: What kinds of mathematics-related programs ARE allowed?
A: The kinds of mathematics-related programs permitted for the ACT allow students to use the calculator capabilities to do the routine calculations yet require students to show their analysis skills by choosing the right operations and process. Mathematics-related programs are allowed if they are single-purpose – for example, finding numeric solutions to a quadratic equation. A student must choose the right program for the right purpose. This is much the same as choosing the right formula for the right purpose.

Q10: Are there any rules that allowed mathematics-related programs must follow?
A: Programs must be written in the language of the calculator. Programs written in a different language, compiled, and loaded onto the calculator are not allowed. In this way, the programs can be examined on the calculator and will use calculator functions. Programs must not be lengthy. The limit is 25 logical lines of code. Programs cannot call another program. Techniques such as compressing code into a data statement are not allowed as a way of getting around this limit. Programs are allowed to change the value of system variables so that results may, for example, be graphed through the normal calculator graphing interface.

Using these guidelines, we at Supertutor have compiled a package of programs that adhere to the ACT’s guidelines as we interpret them. Every program in this package was hand-coded in the BASIC programming language on a TI-84 Plus Silver Edition Calculator by an overcaffeinated intern. They are all single function and less than 25 logical lines of code.

There are 5 programs in this package, with possibly more to come.

DIST – Finds the distance between two points

MDPNT – Finds the midpoint betweent wo points

NUMDIAGS – Finds the number of diagonals in a regular polygon

PNTSLOP – Finds the point slope form of a line from two points

QUADRATC – Solves a quadratic equation using the quadratic formula

Download the program package here

The download will be in a .zip file which you can open with your preferred archive manager, such as WinZip, 7-Zip, or WinRAR.


Need help getting these programs on your calculator? Check out this video: