Average of scores
10, 12, 12, 15, 18Average 13.4
Average Calculator
Use this free average calculator to find the arithmetic mean of a list of numbers and review count, sum, median, mode, range, and sorted values.
Inputs to check Example numbers Copyable answer Tab-only history
Average17.2222222222
- Mean
- 17.2222222222
- Median
- 18
- Mode
- 21
- Range
- 15
Steps
- Sort the data: 10, 12, 12, 15, 18, 21, 21, 21, 25.
- Add all values for sum 155 and divide by 9 to get the average.
- Use the middle value for the median and most frequent value for the mode.
- Subtract min 10 from max 25 for the range.
How to use the Average Calculator
- Enter a list of numbers separated by commas, spaces, or line breaks.
- Press Calculate average to find the arithmetic mean.
- Review the sum, count, median, mode, range, and sorted values for context.
- Use examples, recent answers, or copy the average while checking your work.
What people use it for
Find the average score, cost, time, or measurement from a list.
Check homework that asks for arithmetic mean.
Compare average with median, mode, and range.
Quickly summarize a small data set without a spreadsheet.
Quick examples
Average of measurements
4, 8, 15, 16, 23, 42Average 18
Average with repeated values
72, 84, 84, 90, 93Average 84.6
Need the guide or a nearby tool?
Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.
- How to use the Average Calculator See slower examples, input meanings, formula notes, result limits, and mistakes to avoid.
- Calculators Browse related calculators and utilities in the same category.
- Percentage And Ratio Calculator Hub Compare this with the nearby tools and checks in the same job path.
- Calculator and utility guides Find more guides that use real tool inputs and example numbers.
- All free tools Search every live tool, converter, calculator, AI helper, and browser utility.
Frequently asked questions
Quick answers about formulas, inputs, examples, result copying, and private in-browser history.
What does average mean in this calculator?
Average means arithmetic mean. The calculator adds all values, then divides by how many values you entered.
Can I enter values on separate lines?
Yes. Separate numbers with commas, spaces, semicolons, or new lines. The calculator reads them as one data set.
What do the main Average Calculator inputs mean?
The main inputs are the numbers, operation, mode, or known values the calculator needs. Keep units consistent, enter percentages the way the page label shows, and use the examples as a quick check before trusting the answer.
How should I read the Average Calculator answer?
Read the headline answer, then check the supporting lines and examples to understand how the calculator got there. If one input changes, rerun the tool and compare the new answer instead of guessing.
What should I double-check before trusting the Average Calculator?
Check units, signs, rounding, and the selected mode before copying the answer. If the number feels weird, rerun one of the examples first, then put your own values back in slowly.
Why does the calculator also show median and range?
The average can be pulled higher or lower by extreme values. Median and range help you see whether the average tells the full story.
What happens if a value repeats?
Repeated values count each time they appear. If 84 appears twice, it contributes twice to the sum and count.
How many values can I enter?
You can enter up to 1,000 numbers. That keeps the browser calculation fast and readable.
Is my data private?
Yes. The calculation runs in your browser tab and recent answers stay only in that tab while you use the page.
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