Weighted Average Calculator

Formula

Σ(value×weight) ÷ Σweights

Worked example

80,90 with weights 2,1 — 83.3333

Quick answer

What does the Weighted Average Calculator do?

Calculate a weighted mean from values and corresponding weights.

What is the Weighted Average Calculator?

Calculate a weighted mean from values and corresponding weights. Use it when you have the required inputs and want a deterministic, repeatable result with the calculation method visible.

How to use this calculator

Enter the values requested by the tool, keep units and time periods consistent, resolve any validation message, calculate, then review the primary answer together with the displayed formula and supporting values.

Formula and method

This calculator uses the deterministic formula Σ(value×weight) ÷ Σweights. Enter the required values, then review the displayed substitution and result breakdown to verify the calculation.

Worked example

80,90 with weights 2,1 83.3333

Common mistakes to avoid

Check units, decimal points, percentages, signs, date/time order, selector choices, and rounding. For important decisions, verify the result against an independent source or qualified professional when appropriate.