Skewness Calculator – Accurate and Easy to Use

This tool calculates the skewness of your data set to help you understand its distribution.

How to Use the Skewness Calculator

To calculate the skewness of a dataset, follow these steps:

  1. Enter the data values in the text field, separated by commas. For example: 1, 2, 3, 3, 4, 5, 6.
  2. Click the “Calculate” button.
  3. The skewness value will be displayed in the “Result” field.

Explanation of How It Works

The skewness of a dataset is a measure of the asymmetry of the distribution of values. It is calculated as follows:

  1. Calculate the mean of the dataset.
  2. Calculate the standard deviation of the dataset.
  3. Compute the skewness using the formula:
  4. skewness = (N * sum((x_i - mean)^3)) / ((N-1) * (N-2) * (stdDev^3))
  5. where N is the number of values in the dataset, x_i are the data values, mean is the average of the data values, and stdDev is the standard deviation.


The calculator has the following limitations:

  • It only accepts numerical data values separated by commas.
  • If non-numerical values are entered, they will be ignored in the calculation.
  • The accuracy of the calculator is dependent on the precision of floating-point arithmetic in JavaScript.
  • It assumes that the dataset has at least three values to calculate skewness meaningfully.

Use Cases for This Calculator

Calculate Skewness of a Dataset

Enter your dataset values into the calculator to instantly calculate the skewness measure. This will help you understand the asymmetry of your data distribution. The calculator will provide you with a clear skewness value indicating whether your data is symmetric, positively skewed, or negatively skewed.

Interpret Skewness Measure

Upon calculating the skewness measure, the tool will provide information on how to interpret the result. You will learn what a skewness value of 0 means and how positive and negative skewness values affect the data distribution. This will help you analyze your dataset effectively.

Compare Skewness for Different Datasets

Use the calculator to compare the skewness measure for multiple datasets. By inputting various datasets, you can quickly determine which dataset is more skewed than the others. This comparative analysis will give you valuable insights into the data distributions.

Understand Symmetric Data

If the skewness measure is close to 0, your data is symmetrically distributed. The calculator will explain what symmetric data looks like graphically and how the distribution appears in a perfect bell shape. Understanding symmetric data is essential for various statistical analyses.

Analyze Positively Skewed Data

If the skewness measure is positive, your data is positively skewed. The calculator will explain how the tail of the distribution extends to the right and what this implies for your dataset. Recognizing positively skewed data helps in making informed decisions based on statistical insights.

Determine Negatively Skewed Data

If the skewness measure is negative, your data is negatively skewed. The calculator will describe how the tail of the distribution extends to the left and what implications this has for your dataset. Identifying negatively skewed data is crucial for accurate data interpretation.

Check Distribution Shape

Based on the skewness measure, the calculator will indicate the shape of your data distribution. You will learn whether your data distribution is symmetrical, skewed to the right, or skewed to the left. Understanding the distribution shape is fundamental in statistical analysis.

Assess Data Variability

Skewness is a measure of the asymmetry of a dataset’s distribution. By using the calculator to assess skewness, you can gain insights into the variability and shape of your data. Understanding data variability is crucial for drawing accurate conclusions and making informed decisions.

Evaluate Data Normality

Skewness is a key indicator of data normality. The calculator will help you evaluate whether your dataset follows a normal distribution or deviates from it based on the skewness measure. Recognizing data normality is essential for applying statistical tests and analyses correctly.

Utilize Skewness in Statistical Analysis

Understanding the skewness measure is vital for various statistical analyses such as hypothesis testing and regression. By using the calculator to calculate skewness, you can integrate this measure into your statistical models and draw meaningful conclusions from your data. Harness the power of skewness in your statistical analysis processes.

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