A clear answer before the details
The mean is found by adding every value and dividing by the count. The median is the middle sorted value, and the mode is the value or values that occur most often.
Average calculator for the mean, median, and mode
An average calculator is most useful when it gives more than one summary. The mean calculator adds every value and divides by the count. A mean median mode calculator also sorts the data to find the middle value and checks which values repeat most often. The range calculator compares the minimum and maximum by subtracting the smallest value from the largest. Together, these measures show the centre and spread of an average of numbers without hiding unusual values.
When to use a weighted average
A weighted average calculator is helpful when observations do not all have the same importance. For example, if homework counts once and an exam counts three times, enter matching values and weights rather than repeating numbers manually. The weighted mean is Σ(value × weight) ÷ Σ weights. Always check that each value has one weight and that the total weight is not zero. For skewed data, compare the mean with the median before describing what is typical.
Formula guide
The key equations are separated below. Start with the calculator mode, then choose the shape or model that matches your problem.
Mean
Add every value and divide by the number of values.
Median
For an even count, average the two middle values.
Mode
A dataset can have no mode, one mode, or several modes.
Range
Range is a simple measure of spread.
Weighted average
Use this when values do not all count equally.
Worked example
For 2, 4, and 6, the sum is 12 and the count is 3, so the mean is 12 ÷ 3 = 4. The median is also 4 and the range is 4.
Formulas for common use cases
Use the matching equation for the problem you are solving, then enter its variables in the calculator above.
Average of numbers
Best for a balanced list without extreme outliers.
Weighted average
Each weight must match exactly one value.
Compare typical values
Compare the range with the mean or median to spot unusual values.
How to use this calculator
- Enter values separated by commas, spaces, or new lines.
- Choose the standard or weighted mode when needed.
- Check the sorted list and the statistic summary.
- Use the copy control to share the result with a classmate or colleague.
Where it helps
An average can summarise test scores, measurements, response times, budgets, or repeated experiments. Looking at mean, median, and mode together is more informative than relying on one number. The median is often better when an outlier pulls the mean away from the typical value, while a weighted mean is useful when assignments or observations count differently.
Common mistakes
Do not omit repeated values: every observation contributes to the mean unless you are explicitly using a frequency table. Check for accidental text, empty separators, and mismatched value-weight lists. A mode does not always exist, and a dataset can have more than one mode. Sorting is only a presentation step; it does not change the mean.