Quartile Calculator
Quartile Calculator
How It Works
Input a list of numbers (comma-separated or space-separated) as the dataset. The calculator will compute the first quartile (Q1), second quartile (Q2 or median), and third quartile (Q3) using interpolation if needed. Click “Calculate” to see the results. Share or embed the calculator using the provided buttons.
Quartile Calculator
Enter Numbers (e.g., 1, 2, 3 or 1 2 3)
Result
Steps
About Quartile Calculator
The Quartile Calculator determines the first quartile (Q1, 25th percentile), second quartile (Q2, median, 50th percentile), and third quartile (Q3, 75th percentile) of a dataset using interpolation for accuracy.
How to Use
- Enter a list of numbers, separated by commas or spaces (e.g., 1, 2, 3 or 1 2 3).
- Click “Calculate” to compute Q1, Q2, and Q3. The page will scroll to the result.
- Click “Clear” to reset the input and results.
- Click “Share” to copy the calculator’s URL to your clipboard.
- Click “Embed” to copy an iframe code for embedding on another website.
- The results and calculation steps will be displayed.
Formula
Quartile positions (interpolation method):
Position = (k / 4) × (n + 1)
Where:
- k = quartile number (1 for Q1, 2 for Q2, 3 for Q3)
- n = number of data points
Value at position (if not integer):
Value = x[k] + (d) × (x[k+1] – x[k])
Where:
- k = floor(position)
- d = position – k
- x[k] = value at position k
- x[k+1] = value at position k+1
Important Notes
- Enter at least two numbers in the dataset.
- Numbers can be integers or decimals, separated by commas or spaces.
- The keypad’s Clear button clears the input field.
- “Share” and “Embed” buttons require a browser that supports the Clipboard API.