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CALCULATORS

Average Calculator

Calculate simple arithmetic mean or weighted average with custom weights. Paste raw number lists or spreadsheet columns to compute sum, median, range, quartiles (Q1, Q3), and standard deviation.

Tool statusRuns in your browser
Preview
prontouso://math/average-calculator
LOCALLIVE RESULT

Values

Each number contributes equally to the average.

01 / INPUT
01
02
03
04
05
Result display
Choose how many decimal places to show. The calculation itself always uses the full values.
No login · nothing is sent
AVERAGE5 VALUES
ARITHMETIC MEAN
8.20

The sum of 5 values is 41.00. Divided by 5, the average is 8.20.

41.00 ÷ 5sum ÷ count
ALL EQUALLY WEIGHTED
8.00MEDIAN
41.00SUM
6.50 → 10.00MIN → MAX
3.50RANGE
7.50Q1
9.00Q3
1.21STD DEV
1.35SAMPLE STD DEV
Where the values sitMEAN · MEDIAN · VALUES
median 8.00mean 8.20
min 6.50max 10.00
mean median values
How the average is built02 / OUTPUT
SUM41.00
COUNT5
AVERAGE8.20

How it works

  1. Enter your input

    Fill in the values, paste your text, or upload the file this tool works with.

  2. See results instantly

    Most tools update live as you type; a few use a single button. Either way, the result appears right on this page.

  3. Use your results

    Copy, download, or share what the tool produces — you're always in control of the output.

Privacy and processing — Runs locally in your browser. This tool does not upload your input.

What is Average Calculator?

ProntoUso's Average Calculator parses raw numerical data from text blocks or spreadsheets. Instantly calculates simple mean, weighted average, median, total sum, min/max values, range, quartiles ($Q_1, Q_3$), and sample/population standard deviations.

UNDERSTAND THE TOOL

How to Calculate Mean, Weighted Average, and Descriptive Statistics

Paste number sets or weighted data lists to calculate arithmetic mean, weighted average, median, range, quartiles, and standard deviation.

Simple mean vs weighted average

Simple arithmetic mean sums all values and divides by item count (n). Weighted average assigns weights to values (e.g., test scores with different credit weights), multiplying values by weights and dividing by total weights.

Simple mean
sum(x) / n
Weighted average
sum(x * weight) / sum(weights)

Median, quartiles, and data dispersion

The median (Q2) identifies the middle value of an ordered dataset. The tool displays 1st Quartile (Q1, 25%), 3rd Quartile (Q3, 75%), range (Max - Min), and population (sigma) or sample (s) standard deviation.

Range
max - min
Sample standard deviation (s)
sqrt(sum((x - mean)^2) / (n - 1))

Freeform paste formatting

Paste data directly from Excel, Google Sheets, or text files. The parser automatically recognizes numbers separated by newlines, commas, semicolons, spaces, or tabs.

100% browser-based execution

Statistical calculations process locally inside your browser. Pasted numbers are never transmitted to servers or stored in history.

Frequently Asked Questions

What is the difference between Mean and Median?

The mean sums all numbers and divides by count, making it sensitive to extreme outliers. The median is the middle number in an ordered list, dividing data into equal halves.

How do I paste weighted grades to calculate a weighted average?

In 'Weighted Average' mode, paste one entry per line formatted with value and weight separated by semicolons or tabs (e.g., '85; 2' on line 1 and '90; 3' on line 2).

When should I use sample vs population standard deviation?

Use population standard deviation (divide by n) when analyzing complete datasets. Use sample standard deviation (divide by n - 1) when your numbers represent a sample of a larger population.

Does the calculator support comma and period decimals?

Yes. The parser recognizes both decimal conventions (e.g., '10.5' and '10,5').

What do Q1 and Q3 values represent?

Q1 (1st Quartile) is the 25th percentile mark of your dataset. Q3 (3rd Quartile) is the 75th percentile mark, illustrating data spread.

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