# Upper or Third Quartile Calculator

## Use our simple online calculator to calculate the Upper or Third Quartile value of any series of numbers.

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1. For Windows or Linux - Press Ctrl+D

2. For MacOS - Press Cmd+D

3. For iPhone (Safari) - Touch and hold, then tap Add Bookmark

4. For Google Chrome - Press 3 dots on top right, then press the star sign

## How to use the Upper or Third Quartile Calculator

1

### Step 1

Enter your set of numbers in the input field. Numbers must be separated by commas.

2

### Step 2

Press Enter on the keyboard or on the arrow to the right of the input field.

3

### Step 3

In the pop-up window, select “Upper or Third Quartile”. You can also use the search.

## What is Upper or Third Quartile in Math

Quartiles are values that divide a data table (or part of it) into four groups containing an approximately equal number of observations. The total volume is divided into four equal parts: 25%, 50%, 75% 100%. The F-value of the third quartile (or upper quartile) Q3 is 0.75.

Quartiles are calculated as follows. The f-value of each value from the data table is calculated. where i is the index of the value and n is the number of values. The third quartile is calculated by interpolating between f-values that are directly below and above 0.75 to find the value corresponding to the f-value of 0.75.