Study & School

Weighted Average Calculator

Study & School

Weighted Average Calculator

Live answer84.58,450 total quality points ÷ 100 total weight

Value 1 (score or percent)Example: homework average.Weight 1 (weight)Value 2 (score or percent)Example: midterm score.Weight 2 (weight)Value 3 (score or percent)Example: final exam score.Weight 3 (weight)Value 4 (optional)Leave weight 4 as 0 if you only need three rows.Weight 4 (optional weight)

Live result84.58,450 total quality points ÷ 100 total weight

Formula used

Weighted average = Σ(value × weight) ÷ Σ(weight). If weights are percentages that add to 100, this is the same as adding each value × weight percent ÷ 100.

This is the method behind the answer, so the result can be checked rather than simply trusted.

Live math canvas

Your numbers, formula and explanation together

Weighted Average Calculator: 84.5. 8,450 total quality points ÷ 100 total weight

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

Weighted average = Σ(value × weight) ÷ Σ(weight). If weights are percentages that add to 100, this is the same as adding each value × weight percent ÷ 100.

Apply the formulaWeighted average = Σ(value × weight) ÷ Σ(weight). If weights are percentages that add to 100, this is the same as adding each value × weight percent ÷ 100.84.58,450 total quality points ÷ 100 total weight

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

Value 1: 90 score or percent
Weight 1: 20 weight
Value 2: 80 score or percent
Weight 2: 30 weight
Value 3: 85 score or percent
Weight 3: 50 weight
Value 4: 0 optional
Weight 4: 0 optional weight

Resulting answer

84.5

8,450 total quality points ÷ 100 total weight

Answer: 84.5
Live support: 8,450 total quality points ÷ 100 total weight

Assumptions used

What this answer assumes

Best for grade categories, credit-weighted scores, survey indexes, portfolio scorecards and spreadsheet checks where values, weights, contribution math and notes need to stay printable together.

Weights must be zero or positive; rows with zero weight are ignored in the weighted result.
Weights can be percentages, credits, units or relative importance as long as the same meaning is used across rows.
If percent weights are intended, check that the total weight is 100.
The calculator computes a weighted mean only; it does not apply school-specific gradebook rules.
Missing work should be entered according to the course policy, often as zero if it counts.

Master’s Tip

How to use the result well

Master’s Tip: write down whether weights are category percentages, credits or arbitrary units. The arithmetic is the same, but the meaning of the result depends on the meaning of the weights.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

Value 1: 90 score or percent
Weight 1: 20 weight
Value 2: 80 score or percent
Weight 2: 30 weight

Contribution check

84.50

8450.00 weighted total ÷ 100.00 total weight.

Row	Value	Weight	Value × weight
1	90.00	20.00	1800.00
2	80.00	30.00	2400.00
3	85.00	50.00	4250.00
4	0.00	0.00	0.00

Visual grid

This number is one point on a larger pattern

Weighted Average is not just a final answer. It is a step on a line: before and after, input and output, assumption and result.

Micro-timehours, minutes, shiftsHuman scaledays, weeks, projectsMacro-timemonths, years, calendars

InputFormulaResult

84.5

CalculationTime keeps the path visible: the input, the method and the final number belong together.

84.58,450 total quality points ÷ 100 total weight

Inputs

Value 1: 90 score or percent
Weight 1: 20 weight
Value 2: 80 score or percent
Weight 2: 30 weight
Value 3: 85 score or percent
Weight 3: 50 weight
Value 4: 0
Weight 4: 0 optional weight

Method

Weighted average = Σ(value × weight) ÷ Σ(weight). If weights are percentages that add to 100, this is the same as adding each value × weight percent ÷ 100.

Homework is 90 worth 20, midterm is 80 worth 30 and final is 85 worth 50. Weighted average = (90×20 + 80×30 + 85×50) ÷ (20+30+50) = 8,450 ÷ 100 = 84.5.

Assumptions

Weights must be zero or positive; rows with zero weight are ignored in the weighted result.
Weights can be percentages, credits, units or relative importance as long as the same meaning is used across rows.
If percent weights are intended, check that the total weight is 100.
The calculator computes a weighted mean only; it does not apply school-specific gradebook rules.

Notes

Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.