What is a percentile?

The k-th percentile is a value below which k% of data falls. The 90th percentile means 90% of values are at or below this value.

What's the difference between percentile and percentage?

Percentage is a portion of a whole (e.g., 80% correct answers). Percentile is a ranking position (e.g., 80th percentile means you scored higher than 80% of others).

Quartiles divide data into 4 equal parts: Q1 (25th percentile), Q2/median (50th), Q3 (75th). IQR (Interquartile Range) = Q3 - Q1.

How is percentile rank calculated?

Percentile rank = (number of values below x / total values) × 100. Some methods include the value itself, others interpolate.

What is a 'percentile score' in tests?

If you score at the 75th percentile, you performed better than 75% of test-takers. It's a relative measure, not an absolute score.

Percentile Calculator

Calculate percentiles, quartiles, and ranking positions for datasets.

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10 values

12283542505863728495

Target Percentile: 75th

1st25th50th75th99th

Data Distribution

75th Percentile

0

75% of values are at or below this value

Five-Number Summary

Min

Q1 (25%)

Median

Q3 (75%)

Max

IQR

Q3 - Q1

Range

Data Points

Documentation

Percentiles & Quartiles

Percentiles divide data into 100 equal parts. Quartiles are special percentiles: Q1 (25th), Q2 (50th), Q3 (75th).

Percentile

IQR

Outlier

Frequently Asked Questions

How to Use

About the Percentile

What it calculates

This percentile solves mathematical and statistical problems using standard formulas. Calculate percentiles, quartiles, and IQR.

When to use it

Use for homework, data analysis, exam prep, or quick verification of manual calculations.

Example

Adjust the inputs above to model your specific scenario with the Percentile.

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Percentile Calculator

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Data Distribution

0

Five-Number Summary

Percentiles & Quartiles

About the Percentile

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