Rex says
The fast lane for the math you almost remember from school. Type the numbers, get the answer, move on with your day.
Try a scenario
Click to load — tweak from there.Inputs
Result
Mean
14.2857
Median
14.0000
Mode
18.0000
Sum
100.0000
Range
15.0000
Count
7
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter numbers.
- 2Read your mean on the right — it updates as you type.
- 3Hit Share to keep the scenario or send it to someone.
About this calculator
Enter numbers separated by commas or spaces to get the mean, median, mode, sum, and range.
Worked example
Using the values the calculator loads with:
Inputs
- Numbers: 12, 18, 9, 14, 22, 18, 7
Results
- Mean: 14.2857
- Median: 14
- Mode: 18
- Sum: 100
- Range: 15
- Count: 7
What each field means
Inputs
- Numbers
- Free text used in the calculation. Defaults to "12, 18, 9, 14, 22, 18, 7".
Results
- Mean
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Median
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Mode
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Sum
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Range
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Count
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the average (mean / median / mode) calculator work?
Enter numbers separated by commas or spaces to get the mean, median, mode, sum, and range.
What do I need to enter?
Just one value: numbers. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the mean result mean?
It is returned as a decimal number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are rounded for display; the underlying calculation keeps full precision.
Who is this tool for?
It's built for students, developers, and anyone who needs the answer right now without setting up a spreadsheet.
Accuracy and limitations
- Results are rounded for display; the underlying calculation keeps full precision.
- Very large or very small inputs may hit floating-point limits in the browser.
- Inputs outside the accepted range are clamped rather than rejected.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Average Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/average
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/average" target="_blank" rel="noopener">Average Calculator — RevenueLab</a> (2026).</p>
Source: [Average Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/average) (2026).