Trimmed Mean Calculator – Accurate Statistical Tool

Our trimmed mean calculator allows you to easily calculate the average of a data set while removing the highest and lowest values.

Trimmed Mean Calculator

The trimmed mean is a measure of central tendency similar to the mean, but it reduces the influence of outliers by removing a small designated percentage of the largest and smallest values before calculating the mean.

How to Use:

  1. Enter your data points separated by commas in the “Enter data” field.
  2. Enter the percentage of data to trim from both ends in the “Trim Percentage” field (value between 0 and 50).
  3. Click the “Calculate” button to compute the trimmed mean.
  4. The result will be displayed in the “Result” field.


The trimmed mean is calculated by removing a specific percentage of the smallest and largest values from the data set and then computing the mean of the remaining values. This helps in reducing the impact of outliers. The formula can be expressed as:

[ text{Trimmed Mean} = frac{sum text{trimmed data}}{text{number of trimmed data points}} ]

where the trimmed data is obtained by removing the specified percentage of smallest and largest values from the data set.


  • Data points must be numeric values separated by commas.
  • The trim percentage should be a value between 0 and 50.
  • If the percentage is too high for a small data set, it may remove most or all data points, making the trimmed mean meaningless.

Use Cases for This Calculator

Calculate Trimmed Mean for a Dataset

Enter a list of numbers in the calculator, specify the percentage of data to trim from both ends, and click the calculate button to get the trimmed mean. This tool helps you eliminate outliers and get a more robust average of your dataset.

Input Validation to Prevent Errors

The calculator ensures that your input is valid by checking if the numbers are entered correctly and that the percentage to trim is within a reasonable range. If there are errors, clear instructions will be displayed on how to correct them.

Adjust Percentage of Data to Trim

You can easily change the percentage of data to trim before calculating the trimmed mean. This feature allows you to experiment with different levels of trimming to see how it affects the final result.

Clear the Input Fields

If you want to start over or input a new dataset, you can click the clear button to reset the input fields quickly. This function saves you time from manually deleting each number in the list.

Interpretation of Trimmed Mean Result

Once you calculate the trimmed mean, the result will be displayed along with a brief explanation of what it represents. This helps you understand the significance of using a trimmed mean over a traditional average.

Copy or Save Trimmed Mean

If you need to use the trimmed mean value elsewhere, you can copy it to your clipboard with a single click. Additionally, an option to save the result as a text file for future reference is available.

Calculate Trimmed Mean for Large Datasets

Whether you have a small set of numbers or a large dataset, the trimmed mean calculator can handle all sizes efficiently. You can trim outliers from hundreds or thousands of data points with ease.

Compare Trimmed Mean with Regular Mean

For educational purposes or data analysis, you can compare the trimmed mean with the regular mean of your dataset to see how outlier removal affects the average. This comparison can provide valuable insights into your data.

Responsive Design for Mobile Users

The calculator is designed to be mobile-friendly, allowing you to perform trimmed mean calculations on your smartphone or tablet with ease. The layout adjusts to different screen sizes for a seamless user experience.

Share Trimmed Mean Results

If you want to share the trimmed mean result with others, you can do so through integrated social media sharing buttons. Spread the word about the benefits of using a trimmed mean in data analysis.

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