15 Popular ACT Math Formulas

15 Popular ACT Math Formulas

Math isn’t easy for everyone, but unfortunately, it’s unavoidable when it comes to taking the ACT exam. In fact, math makes up a large portion of the ACT exam.

While the math section may feel intimidating, there are a few things you can do to make this section a little easier for yourself.

One way to make the math section a little less intimidating is to learn what formulas you can expect to find on the ACT exam.

What is the ACT Test? What You Need to Know

However, the thing about the ACT is that you won’t be given a cheat sheet with all of the math formulas that you’ll need to know. It’s up to you to memorize them.

So to help you with that, we put together 15 of the most popular ACT math formulas that you can expect to find on the exam.

What to Expect on the ACT Math

There are 60 multiple-choice questions from six areas of math:

  • Pre-Algebra / Elementary Algebra: 24 questions
  • Intermediate Algebra / Coordinate Geometry: 18 questions
  • Plane Geometry / Trigonometry: 18 questions

ACT Test Prep Course

15 Popular ACT Math Formulas

1.Quadratic Formula

Quadratic Formula

2. Area

Area of a Trapezoid

Area of a Rectangle

Area of a Triangle

Area of a Circle

3. Volume

Volume of a Rectangular Prism

Volume of a Cylinder

Volume of a Pyramid

Volume of a Sphere

4. Surface Area

Surface Area of a Sphere

Surface Area of a Cube

5. Perimeter

Perimeter of a Triangle

Perimeter of a Square

Perimeter of a Rectangle

6. Averages


7. Slope-Intercept Form

Slope Intercept Form

8. Pythagorean Theorem

Pythagorean Theorem

9. Exponents and Roots

Exponent and Roots

10. Non-Right Triangles

Non-Right Triangles


11. Trigonometric Identities

Trigonometric Identities


12. Probability


13. Distance



14. Midpoint Formula

Midpoint Formula

15. Log


Published by

Jay Willis

Jay Willis joined Mometrix as Vice President of Sales in 2009, and has developed several key strategic relationships that have enhanced the distribution of Mometrix products. With nearly 20 years of sales experience in the publishing industry, his dedication to providing the highest quality experience for customers, coupled with his sales and marketing expertise, has resulted in significant growth of the Institutional Sales division. Learn more