Math & Scientific
Average Calculator
Average — it computes the arithmetic mean = sum of the values ÷ how many there are. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
From your numbers, Average Calculator computes the mean via sum of the values ÷ how many there are. No accounts, no uploads — just an instant way to work out the average.
About this calculator
Get average right and the rest of the task gets easier. It computes the arithmetic mean = sum of the values ÷ how many there are. It matters when you need the exact relationship checked quickly rather than worked through by hand. The mean of 4, 8, 15, 16, 23 = (4+8+15+16+23) ÷ 5 = 66 ÷ 5 = 13.2 . The tool above does the same computation in your browser — free, private, nothing stored.
How to use
- Enter your numbers separated by commas or spaces.
- Press Calculate to run the average calculator.
- Read the result: the mean, count, sum, median, and the smallest and largest values.
- Press Reset to clear the average calculator and start again.
Why use Average Calculator
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Accurate
Based on standard, well-established formulas.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Honest disclaimers wherever browser limits or regional rules apply.
Common uses
Use it when revising for exams
Use it when working through problems
Use it for verifying answers from a textbook
Use it for double-checking a spreadsheet result
Use it for understanding a formula's behaviour
Use it for science-fair and project numbers
Technical notes
Average Calculator computes the arithmetic mean = sum of the values ÷ how many there are.
Inputs are taken exactly as entered, so check for typos before trusting an answer.
All arithmetic runs in your browser using double-precision floating point, so extreme inputs may show tiny rounding differences.
FAQ
What does the Average Calculator calculate?
It calculates the mean (average) of any list of numbers, plus the count, sum, median, minimum and maximum.
How do I enter numbers in the Average Calculator?
Type them separated by commas, spaces, or new lines — for example 12, 18, 25, 9, 14.
What is the difference between mean and median?
The mean is the sum divided by the count; the median is the middle value when the numbers are sorted. Both are shown.
Does the Average Calculator send my data to a server?
No — the Average Calculator runs entirely in your browser, so the numbers you enter never leave your device.
Worked example
The mean of 4, 8, 15, 16, 23 = (4+8+15+16+23) ÷ 5 = 66 ÷ 5 = 13.2.