Enter two values with weights (e.g. course scores and credits)—weighted mean.
Weights must be ≥ 0 and their sum > 0. The result is (value₁×weight₁ + value₂×weight₂) ÷ (weight₁ + weight₂)—only two buckets in this minimal form.
This calculator uses plain decimal numbers. If a result looks wrong, check whether you used a comma instead of a dot (or vice versa) where the field expects one.