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Percentile Calculator: Rank and Value from Your Data

This free percentile calculator works two ways. Give a value and find its percentile rank in your data, or give a percentile such as 90 and find the value at that point. It also lists the quartiles.

By Debmedia Technologies LLP · Kolkata, India · Updated

What Is It and When Do You Need It?

Percentiles show where a value stands in a group. Test scores, growth charts, salaries and response times are all reported in percentiles.

Paste your data and choose whether to find a value or a rank.

How to Use This Tool

  1. Paste your numbers.
  2. Choose value-at-percentile or percentile-rank.
  3. Enter the percentile or the value.
  4. Press Calculate.

How the Calculation Works

For the value at percentile p, the data is sorted and the position is p ÷ 100 × (n − 1). The value is interpolated between the two nearest ranks. The percentile rank of x is (count below x + 0.5 × count equal to x) ÷ n × 100. Quartiles are the 25th, 50th and 75th percentiles.

Worked Example

For the numbers 1 to 10, the 90th percentile is 9.1, and the percentile rank of 7 is 65.

Common Uses

  • Test scores and grades.
  • Performance and speed reports.
  • Salary comparisons.
  • Data analysis.

Tips and Common Mistakes

  • More data gives more stable percentiles.
  • The median is the 50th percentile.
  • Quartiles split the data into four groups.
  • When you compare results from different software, check which percentile method each uses, because small data sets can give slightly different answers with different methods.
  • A percentile rank describes position in your own list, not in the whole population, so a small or unusual list can mislead.

Next, you may need the average calculator, standard deviation calculator, z-score calculator, confidence interval calculator.

Everything runs in your browser. Nothing you type is uploaded, stored or sent to any outside service.

Frequently Asked Questions

The value below which a given share of the data falls. The 90th percentile is the value that 90% of the data is at or below.
The data is sorted, and the tool uses linear interpolation between neighbouring values, the method used by Excel’s PERCENTILE.INC.
The share of values below your value, plus half the share equal to it, times 100.
Yes. Software uses several methods and may give slightly different answers for small data sets.

Disclaimer: results are calculated in your browser from the numbers you enter. Check important results before you rely on them for money, health, safety or legal decisions.