Rubric Score Calculator Formula

Understand the math behind the rubric score calculator. Each variable explained with a worked example.

Use the Rubric Score Calculator

Formulas Used

Total Score (%)

total_pct = weighted_sum / (max_per_criterion * total_weight) * 100

Weighted Average (raw)

weighted_avg = weighted_sum / total_weight

Max Possible Points

max_possible_pts = max_per_criterion * total_weight

Variables

VariableDescriptionDefault
criterion1_scoreCriterion 1 Score4
criterion1_weightCriterion 1 Weight25
criterion2_scoreCriterion 2 Score3
criterion2_weightCriterion 2 Weight25
criterion3_scoreCriterion 3 Score5
criterion3_weightCriterion 3 Weight30
criterion4_scoreCriterion 4 Score4
criterion4_weightCriterion 4 Weight20
max_per_criterionMax Score per Criterion5
total_weightDerived value= criterion1_weight + criterion2_weight + criterion3_weight + criterion4_weightcalculated
weighted_sumDerived value= criterion1_score * criterion1_weight + criterion2_score * criterion2_weight + criterion3_score * criterion3_weight + criterion4_score * criterion4_weightcalculated

How It Works

How Rubric Scoring Works

A rubric assigns scores across multiple criteria, each potentially weighted to reflect its importance.

Formula

Total % = Sum(Score_i x Weight_i) / (Max Score x Sum of Weights) x 100

Scale Interpretation (on a 5-point rubric)

  • 5: Exemplary
  • 4: Proficient
  • 3: Developing
  • 2: Beginning
  • 1: Not yet meeting standard

    • Worked Example

    Four criteria (weights 25, 25, 30, 20) scored 4, 3, 5, 4 on a 5-point scale.

    criterion1_score = 4criterion1_weight = 25criterion2_score = 3criterion2_weight = 25criterion3_score = 5criterion3_weight = 30criterion4_score = 4criterion4_weight = 20max_per_criterion = 5
    1. 01Weighted sum: 4x25 + 3x25 + 5x30 + 4x20 = 100 + 75 + 150 + 80 = 405
    2. 02Max possible: 5 x (25+25+30+20) = 5 x 100 = 500
    3. 03Total: 405 / 500 x 100 = 81.0%
    4. 04Weighted average: 405 / 100 = 4.05 out of 5

    Ready to run the numbers?

    Open Rubric Score Calculator