Percentile Calculator
Find the percentile rank of a score in a dataset, or find the value at a given percentile. Enter up to 10 data values.
Did this tool work for you?
How to use this calculator
Sort the data, then find the position L = (P/100) × n. Round up to the nearest whole number to identify the value at percentile P.
- 1
Enter up to 10 data values (leave unused fields blank or at 0).
- 2
Enter the score whose percentile rank you want in the last field.
- 3
The calculator also shows Q1, median, Q3, and IQR automatically.
Frequently asked questions
What does the 75th percentile mean?
A score at the 75th percentile is higher than 75% of the values in the dataset. It is the same as Q3 (the third quartile).
How are quartiles calculated?
Q1, Q2, Q3 divide sorted data into four equal parts. Q2 is the median. Q1 is the median of the lower half; Q3 is the median of the upper half. Different software may use slightly different methods.
What is IQR used for?
The interquartile range (Q3 − Q1) measures the spread of the middle 50% of data. It is resistant to outliers and used to detect outliers: values more than 1.5×IQR below Q1 or above Q3 are flagged as potential outliers.
Percentile Calculator — Rank & Quartiles
How to use the percentile
Use this percentile to find the percentile rank of a score in a dataset, or find the value at a given percentile. Enter your values above and get your result in seconds. The tool is free, works on all devices, and keeps your data private — nothing is stored or shared.
How the percentile works
The percentile calculator uses standard formulas used in statistical analysis, data science, and research. Enter your inputs, and the tool calculates the result instantly in your browser. No server-side processing means your data stays on your device. Results update in real time as you change inputs.
Percentile vs percentage
A percentage is a ratio out of 100 (e.g., scoring 80% on a test). A percentile rank tells you where a score stands relative to a group — the 80th percentile means scoring higher than 80% of the group, regardless of the actual score value.
Using percentiles in practice
Percentiles appear in growth charts (children's height/weight), standardised test scores (SAT, GRE), income distributions, and performance benchmarking. The interquartile range (IQR = Q3 − Q1) is one of the most robust measures of spread because it ignores extreme values at both ends.
Percentile: how it works
Statistical analysis underpins data science, research, quality control, and business intelligence. This tool applies established textbook formulas to your dataset and returns results instantly, eliminating manual calculation errors.
Who uses this tool?
Researchers, students, analysts, and business professionals use it to understand datasets quickly. Whether you are summarising survey responses or checking experiment results, this tool delivers the key figures instantly.
Learn more from an authoritative source:
WikipediaCorrelation Coefficient Calculator
Calculate Pearson correlation coefficient (r) between two variables. Measures strength and direction of linear relationships.
Linear Regression Calculator
Calculate the linear regression line (y = mx + b) for a dataset. Find slope, intercept, and predict Y for any X value.
Z-Score Calculator
Calculate the z-score (standard score) and percentile rank for any value in a normal distribution. Convert raw scores to z-scores instantly.
T-Test Calculator
Perform a one-sample t-test to determine if a sample mean is significantly different from a known population mean. Returns t-statistic and p-value.
Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →