EVERYDAY MATH
Average calculator
Calculate the arithmetic mean, median, sum, count, minimum, maximum, range and an optional weighted average for a list of numbers.
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No regional currency, unit or language profile is applied. This choice does not convert values or change formulas, results, routes or legal guidance.
Use any mix of positive numbers, negative numbers and decimals. Up to 200 values are included.
Leave blank for an ordinary average. Zero-weight values are excluded; at least one weight must be positive.
Arithmetic mean
865 values calculated locally.- Count
- 5
- Median
- 88
- Sum
- 430
- Minimum
- 75
- Maximum
- 95
- Range
- 20
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Verification and calculation details
- Purpose
- Average calculator
- Variables and units
- Use the labelled fields and units shown in the calculator. Results use those units unless a conversion is stated.
- Formula and method
- The exact formula and worked example are shown below. Deterministic formula executed locally in the browser.
- Assumptions
- Only entered values and stated assumptions are included. Local fees, rules and professional requirements are excluded unless explicitly shown.
- Engine version
- 1.0.0
- Production verification baseline
- Release 63 · source
998803f - Verification run
release-v63-2026-09-20- Last verified
- — Automated release checks passing
Read the Calculation Standard · Report a calculation or source issue
How this calculator works
Arithmetic mean = sum of all included values ÷ count of included values. Median is the middle value after sorting, or the average of the two middle values when the count is even. Weighted mean = sum of each value multiplied by its weight ÷ sum of weights.
Variables and inputs
- Numbers to average
- Required numeric input. finite numeric value; calculator-specific validation applies.
- Optional weights
- Optional numeric input. one non-negative finite weight per value; at least one weight must be positive.
How to interpret the result
The calculator returns arithmetic mean, median, count and sum, minimum and maximum, range, optional weighted average and total weight. Read each output against the assumptions you entered, compare alternatives one variable at a time, and use the result as an estimate rather than a promise.
Common mistakes to avoid
- Mixing units or entering a rate as a decimal when the field requests a percentage.
- Rounding intermediate values instead of the final displayed result.
- Leaving out a cost, timing rule or local requirement listed in the assumptions below.
Practical uses
Use the average calculator to check a real scenario, compare a changed assumption and explain the arithmetic before relying on a quote, specification or decision.
Worked example
For 82, 90, 75, 88 and 95, the sum is 430 and the count is 5, so the average is 86. The sorted middle value is 88, so the median is 88.
Assumptions and limitations
- every parsed number receives equal weight in the arithmetic mean
- weighted mode requires exactly one non-negative weight per value and a positive total weight
- blank items are ignored but non-numeric items make the submitted list invalid
- results are estimates; confirm rates, prices, units and professional requirements that apply
Important notes
Results are estimates based on the values entered. Confirm rates, prices, units and professional requirements that apply in your location. Review the Answer Atlas Calculation Standard and corrections policy for formula, privacy and correction rules.
Frequently asked questions
Can I average more than two numbers?
Yes. Paste or type numbers separated by commas, spaces, semicolons or new lines. The calculator includes up to 200 values.
Can I use decimals or negative numbers?
Yes. Decimals and negative values are supported. Unsupported text is rejected instead of being silently counted.
Is the median the same as the average?
No. The average, or mean, adds values and divides by the count. The median is the middle value after sorting.
How do I calculate a weighted average?
Enter one non-negative weight for every value. The calculator multiplies each value by its weight, adds those products and divides by the total weight. Leave weights blank for the ordinary arithmetic mean.