Percentage Calculator
Find a percentage of a number, including the result after adding or subtracting it.
Math
Math
Statistics Calculator
Find the mean, median, range and standard deviation of a list of numbers.
Enter your values
Your result
Arithmetic mean
30
- Number of values
- 5
- Sum
- 150
- Median
- 30
- Minimum
- 10
- Maximum
- 50
- Range
- 40
- Population standard deviation
- 14.142136
- Sample standard deviation
- 15.811388
An estimate based on your inputs. Review the assumptions and method below.
How does this calculator work?
Statistics summarize a set of values. The mean describes the arithmetic center, the median is the middle value after sorting, and standard deviation describes spread around the mean.
The formula
Mean = sum of values ÷ count. Population variance = sum of (value − mean)² ÷ n.
What should you know?
- Accepts up to 10,000 values separated by English or Arabic commas or whitespace.
- Use a period as the decimal separator. Sample standard deviation appears only when there are at least two values.
Common questions
When is the median more useful than the mean?
With extreme values, the median can better represent the center because it is less affected by outliers.
How do population and sample standard deviation differ?
Population variance divides squared deviations by n. Sample variance divides by n−1 to estimate spread in a larger population.
Sources and verification
How do we choose formulas and check results?
Sources explain the method or its limits; they do not imply that the linked organizations endorse this calculator.