Uncover the distribution of your data with our free online Statistics Quartile Calculator. Quickly compute the first quartile (Q1), median (Q2), third quartile (Q3), and Interquartile Range (IQR) for any numerical data set, aiding in comprehensive statistical analysis.
Formula:
Calculating quartiles involves ordering your data and then finding the values that divide the dataset into four equal parts.
- Q1 (First Quartile): Represents the 25th percentile, dividing the lowest 25% of data from the highest 75%.
- Q2 (Second Quartile / Median): Represents the 50th percentile, the middle value of the dataset.
- Q3 (Third Quartile): Represents the 75th percentile, dividing the lowest 75% of data from the highest 25%.
- IQR (Interquartile Range): The range between Q3 and Q1 (IQR = Q3 - Q1), indicating the spread of the middle 50% of the data.