Statistics Calculator
Find the mean, median, range and population standard deviation.
Useful context for this calculator
A summary describes a data set but does not explain its cause. Check for outliers and consider the distribution before deciding whether the mean or median is more representative.
- 1Enter every requested value.
- 2Check decimals, rates and units.
- 3Calculate and review the formula.
- 4Verify important figures independently.
Input and result checklist
Use this table before relying on the displayed answer.
| Check | What to review | Why it matters |
|---|---|---|
| Inputs | Values, decimals, signs and units | The output depends entirely on the input |
| Formula | The method displayed above | Shows what is and is not included |
| Assumptions | Rates, time periods and fixed values | Real conditions may be different |
| Rounding | Final displayed precision | Small differences are normal |
Questions about this tool
Mean or median—which is better?
The mean uses every value but is sensitive to outliers. The median can better represent skewed data.
Is the calculator result exact?
It is a mathematical result or estimate based on your inputs. Fees, taxes, rules, measurement error or provider-specific terms may affect a real outcome.
Is my information saved?
The calculator does not require an account. Do not enter passwords, account numbers or sensitive personal information.
Continue your research with NIST Statistics Handbook ↗. External references do not imply endorsement.
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