Average Calculator

What This Tool Does

This calculator finds the average — technically the arithmetic mean — of any list of numbers you enter. Type in your values separated by commas, and it adds them up and divides by how many there are.

You can also use this CGPA calculator.

How It’s Calculated

Average = Sum of All Values ÷ Count of Values

Worked example: Say you have five numbers: 12, 45, 30, 18, and 60.

• Sum: 12 + 45 + 30 + 18 + 60 = 165
• Count: 5
• Average: 165 ÷ 5 = 33

That’s it — every value is added together, then divided by how many values went into the sum.

Edge Cases and Special Rules

• A single number: The average of one number is just that number itself, since count is 1.
• Negative numbers: These work exactly the same way — they’re included in the sum as negative values, which can pull the average down or even below zero.
• Zeros count: A zero in your list still counts toward the total number of values, even though it adds nothing to the sum — leaving it out entirely would change the result.
• Decimals: Results often aren’t whole numbers, so the calculator typically rounds to two decimal places for readability.

Average vs. Weighted Average vs. Percentage Averaging

A plain average treats every value equally. A weighted average gives some values more influence than others — for example, a test worth 40% of a grade should count more than a quiz worth 10%, so each value is multiplied by its weight before dividing by the total weight rather than the count.

Averaging percentages needs the same care. If you’re averaging exam scores that are already percentages of equal-sized tests, a simple average works fine. But if the underlying totals differ (say, one test was out of 50 and another out of 100), averaging the raw percentages can be misleading — the correct approach is usually to go back to the actual totals and calculate from there.

Who Uses This

• Students working out a class or grade average across several scores
• Anyone quickly summarizing a small dataset without opening a spreadsheet
• People comparing performance across a set of numbers, like monthly expenses or scores
• Teachers or coaches calculating average results across a group

Average vs. Weighted Average

These are related but not the same. A standard average assumes every number matters equally. A weighted average adjusts for cases where some numbers should count more than others — like a final grade built from assignments worth different percentages, or a portfolio where larger holdings should influence a blended figure more than smaller ones. If your numbers don’t all carry equal importance, a weighted average calculator is the more accurate tool.

FAQ

What is the formula for calculating an average?

Add up all the values, then divide by how many values there are.

How do I calculate an average percentage?

If the totals behind each percentage are equal, average them directly; if not, recalculate from the original totals for accuracy.

Is average the same as median?

No — average is the sum divided by count, while median is the middle value when numbers are sorted in order.

Can this calculator handle negative numbers?

Yes, negative numbers are included in the sum and can lower the overall average.

How many numbers can I include?

There’s no fixed limit — enter as many comma-separated values as you need.

Try It Above

Enter your numbers, separated by commas, in the calculator above to get the average instantly. Results are for general calculation purposes only.