How to use this calculator
Enter numbers separated by commas, spaces, or new lines. Each value has equal weight. Select a mean type; results also show quartiles, modes and range. Quartiles use linear interpolation at (n−1) × percentile.
- Enter what would you like to find?, average type, numbers and review the remaining options.
- Select Calculate or change a value to update the result. Read the result label and units before copying.
- Use Reset to restore the worked starting values.
Formula and method
Finite numeric inputs are required. Results are rounded for display only.
Worked example
10, 20, 30, 40 have mean 25 and median 25.
Questions about average calculator
Do zero and negative values count in the average?
Yes in arithmetic-mean mode. For −10, 0, and 10, the sum is zero and the mean is zero divided by three, or 0. Weighted mode uses the entered weights; geometric and harmonic modes have additional domain restrictions shown by validation.
What assumptions should I check?
Finite numeric inputs are required. Results are rounded for display only.
Are my inputs saved?
Calculations run in your browser. We store only tool IDs for favorites and recent tools. A calculation link contains your inputs only when you explicitly choose to copy one.