Everyday utility

Statistics Calculator

Compute comprehensive descriptive statistics including mean, median, standard deviation, quartiles, and IQR. Use this Data and utilities tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
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How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

Descriptive statistics summarize a data set. IQR (interquartile range) = Q3 − Q1 and is robust against outliers. Quartiles divide sorted data into four equal parts at Q1 (25%), Q2/median (50%), Q3 (75%).

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

What is the IQR used for?

The IQR measures the middle 50% spread of data. Outliers are often defined as points below Q1 − 1.5×IQR or above Q3 + 1.5×IQR (Tukey fences).