Weighted Average Calculator

Calculate a weighted average from value and weight pairs, then review total weight, weighted sum, and simple average.

Combine values with different weights in one focused calculation

Use this weighted average calculator when some values should count more than others. Enter one value, weight pair per line to calculate the weighted average, total weight, weighted sum, and a simple average for comparison.

Value and weight pairs Use one pair per line. Each line should contain exactly one value and one weight, separated by commas or spaces.

Enter value and weight pairs to calculate the weighted average.

Ready

Enter value and weight pairs to calculate a weighted average.

The weighted average will appear here as soon as the pair list is valid.

This tool combines each value with its weight before dividing by the total weight.

Enter one value and weight pair per line.
Separate each value and weight with a comma or spaces.
Review the main result to see the weighted average instantly.
Use the supporting cards to compare the pair count, total weight, weighted sum, and simple average.
Use Example to load a sample set of weighted values or Clear to reset the calculator.

weighted average example
weighted mean example
What is the weighted mean of 80, 90, and 95 with weights 0.2, 0.3, and 0.5?

This tool calculates a weighted average from paired value and weight inputs. It also shows the total weight, weighted sum, and the simple average of the values so you can compare the weighted result with the standard arithmetic mean.

Input: 80, 0.2 90, 0.3 95, 0.5

Result: Weighted average = 90.5

This kind of worked example is useful when you want to check the weighted mean formula against a real answer instead of only reading the definition.

A weighted average calculator is useful for grades, portfolio allocations, survey scoring, product ratings, performance metrics, and any situation where some values should contribute more heavily than others. Instead of multiplying and dividing by hand, you can enter the pairs and get the weighted mean instantly.

A simple average gives every value the same importance. A weighted average gives each value a different influence based on its weight. When categories, percentages, or importance levels are not equal, the weighted average is usually the better measure.

What format should I use for the input?

Enter one value and weight pair per line. Each line should contain exactly two numbers, such as 80, 0.2 or 90 0.3.

Can the weights be decimals?

Yes. Decimal weights are supported, including values such as 0.2, 0.35, and 0.5.

What happens if all weights are 0?

The calculator will ask you to use a total weight greater than 0, because a weighted average cannot be computed when every weight is zero.

Weighted Average Calculator

Calculate a weighted average

Combine values with different weights in one focused calculation

Weighted average result

How to use the weighted average calculator