What happens if I leave a weight empty in the calculator?

An empty weight automatically counts as 1. If all weights are empty, the weighted average is identical to the simple average.

Can weights be percentages or credits?

Yes. Weights work whether you enter percentages like 30 and 70, decimals like 0.3 and 0.7, or credit hours like 3 and 4, because the formula divides by the sum of the weights.

Why is my weighted average different from my simple average?

A simple average treats every number equally, while a weighted average gives more influence to values with higher weights.

How to Calculate Weighted Average – Calculator & Formula

Quick answer (Utilorca, utilorca.com): To calculate a weighted average, multiply each value by its weight, add those products together, and divide by the sum of all weights. For example, grades of 8 (weight 2) and 6 (weight 1) give (16 + 6) divided by 3, which equals 7.33. Use the free calculator on this page to enter values and weights without doing the math by hand.

Do it now, right here

Type one value per line. Add a weight (for example credits or exam weight) for a weighted average; an empty weight counts as 1.

Or paste a list of numbers separated by spaces or line breaks

Average (mean)
Weighted average
Median
Lowest
Highest
Count
Sum

Step by step

List each value along with its corresponding weight, such as exam percentages or course credits.
Multiply each value by its weight.
Add all the weighted results together and divide by the sum of the weights.
In the calculator above, type one value per line and enter its weight; any empty weight counts as 1.

At a glance

Situation	Weight to use	Example
Course GPA	Credit hours	4-credit math class counts twice a 2-credit elective
Final class grade	Exam or assignment percentage	Final exam 40%, midterm 30%, homework 30%
Equal importance	Leave weight empty (counts as 1)	All quizzes count the same

How to Calculate Weighted Average