# Quartile calculator

# Quartile calculator

**A quartile calculator is a tool used to calculate the quartiles of a dataset, which divides the data into four equal parts. Here are the steps to use a quartile calculator:**

- Enter the dataset values separated by commas or spaces into the quartile calculator.
- Click “Calculate” to find the quartiles.

Here’s an example to illustrate how to use a quartile calculator:

Suppose you have the following dataset: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50.

**To find the quartiles of this dataset using a quartile calculator, you would follow these steps:**

- Enter the dataset values into the quartile calculator: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50.
- Click “Calculate” to find the quartiles.

**The quartiles of the dataset would be calculated as follows:**

- Q1 (first quartile): This divides the dataset into the bottom 25%. To find Q1, we take the median of the lower half of the dataset. In this case, the lower half of the dataset is 5, 10, 15, and 20. The median of this lower half is (10 + 15) / 2 = 12.5. Therefore, Q1 = 12.5.
- Q2 (second quartile, also known as the median): This divides the dataset into the bottom 50% and top 50%. To find Q2, we take the median of the entire dataset. In this case, the median is (25 + 30) / 2 = 27.5. Therefore, Q2 = 27.5.
- Q3 (third quartile): This divides the dataset into the bottom 75%. To find Q3, we take the median of the upper half of the dataset. In this case, the upper half of the dataset is 35, 40, 45, and 50. The median of this upper half is (40 + 45) / 2 = 42.5. Therefore, Q3 = 42.5.

Therefore, the quartiles of the dataset are Q1 = 12.5, Q2 = 27.5, and Q3 = 42.5.