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Class Rank Percentile Calculator

See where your class rank puts you as a percentile.

How it is calculated

The tool converts a position in a list into the share of the class you ranked ahead of. percentile = (class size − rank) ÷ class size × 100. It also shows top % = rank ÷ class size × 100, the share of the class at or above your place. The two always add up to 100%. Rank 1 means the best student, and rank equal to class size means last. Both rank and class size must be whole numbers, rank must be at least 1 and no larger than the class size, and the class size must be above zero; a decimal rank such as 4.5 or a rank beyond the class size shows no result. Results are rounded to two decimals. Because the formula counts the places below you, rank 1 never reaches exactly 100%, and last place is 0.00%. Schools differ in how they treat ties and whether they publish rank at all.

Worked example

A student ranks 42nd in a class of 310. Step 1: students ranked below you = 310 − 42 = 268. Step 2: 268 ÷ 310 = 0.8645. Step 3: multiply by 100 to get a percentile of 86.45%. Step 4: the top share is 42 ÷ 310 × 100 = 13.55%, meaning you sit within the top 13.55% of the class. These two numbers describe the same position from opposite ends, and they add up to 100.00%.

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Common mistakes

  • Mixing up percentile and top percent. 86.45 means you are ahead of 86.45% of the class; the top 13.55% is the other way of saying it.
  • Entering a grade average or percentage instead of a position such as 42.
  • Using the size of the whole school instead of the size of your class or graduating cohort.
  • Expecting rank 1 to equal 100%. In this formula it is 99.68% in a class of 310, because you do not outrank yourself.
  • Entering a decimal rank such as 4.5, or a rank larger than the class size. Neither gives a result; real ranks are whole numbers, and tied students usually share the same whole rank.

About this calculator

A raw class rank — like “42nd out of 310” — is hard to interpret on its own without knowing the class size, and impossible to compare across schools of different sizes. Converting it to a percentile using the formula (class size minus rank) divided by class size, times 100, restates the same standing as “what percentage of the class you outrank,” a figure that's directly comparable regardless of how big the class is.

This calculator takes your rank and your class size and returns your percentile standing. It's commonly used by students and counselors preparing college applications, since many admissions systems and scholarship criteria ask for or benefit from a percentile figure rather than a raw rank out of a school-specific class size.

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