Use the calculator below to estimate an academic index using one of three methods: (1) a simple custom weighted index that blends GPA + SAT + ACT (Main tab), (2) an Ivy League–style Academic Index approximation (60–240 scale; athletics-oriented and not officially published as a single universal formula), or (3) the University System of Georgia (USG) Freshman Index (FI).

Academic Index Calculator

Main (Custom)
Ivy League–Style AI
USG Freshman Index

Custom weighted index used by this tool (not an official Ivy League Academic Index). Enter exactly 3 values to calculate the missing 4th value.

Related Calculators

Academic Index Formula

The following formula is used for the Main (Custom) tab in this calculator. This is a simple weighted index and is not an official Ivy League Academic Index or a universal admissions standard.

AI = (2 * GPA + SAT/10 + ACT/2) / 4

Variables:

  • AI is the Academic Index (custom, as defined by the formula above)
  • GPA is the Grade Point Average (typically on a 4.0 scale)
  • SAT is the total SAT score (out of 1600)
  • ACT is the ACT composite score (out of 36)

To calculate this calculator’s Main (Custom) AI, multiply the Grade Point Average by 2, divide the total SAT score by 10, and divide the ACT composite score by 2. Add these three results together and then divide by 4. (In many real admissions contexts, a school uses either SAT or ACT according to its policy rather than combining both scores.)

What is an Academic Index?

“Academic Index” can refer to different numeric rating systems used to summarize academic readiness. There is not one single, universally accepted Academic Index formula used by all colleges. A well-known example is the Ivy League–style Academic Index often discussed in the context of recruited athletes, typically reported on a 60–240 scale and based on standardized testing plus a converted class-rank (or similar) measure. Some public university systems use different readiness indexes (for example, the University System of Georgia “Freshman Index”). This page provides calculators for multiple commonly referenced approaches/approximations.

How to Calculate Academic Index?

The following steps outline how to calculate the Academic Index (AI) for the Main (Custom) formula shown above.

  1. First, determine the Grade Point Average (GPA), typically on a 4.0 scale.
  2. Next, determine the total SAT score (SAT) out of 1600.
  3. Next, determine the ACT composite score (ACT) out of 36.
  4. Next, multiply the GPA by 2.
  5. Next, divide the SAT score by 10.
  6. Next, divide the ACT score by 2.
  7. Next, add the results of steps 4, 5, and 6 together.
  8. Finally, divide the sum from step 7 by 4 to calculate the Academic Index (AI).

Example Problem:

Use the following variables as an example problem to test your knowledge.

GPA = 3.5

SAT = 1200

ACT = 28

Using the Main (Custom) formula: AI = (2 × 3.5 + 1200/10 + 28/2) / 4 = (7 + 120 + 14) / 4 = 35.25.