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Cognitive Load Estimate Calculator

Work out cognitive load estimate instantly with clear inputs, formula shown and shareable results.

About Cognitive Load Estimate Calculator

Cognitive load theory holds that working memory can juggle about four interacting elements at once. Prior knowledge chunks several elements into one, reducing the load: nine elements with three already chunked leaves six effective elements, a load ratio of 1.5 - overloaded, and a signal to segment the material.

Formulas

Effective elements

effective = interacting elements - already chunked elements

Load ratio

ratio = effective elements / working memory capacity

Worked example

With the default values below, Cognitive Load Estimate Calculator returns Cognitive Load Ratio of 1.500. Change any input above and every figure here is recalculated in your browser.

Inputs used

Interacting information elementsminimum 1
9
Working memory capacityminimum 1 chunks
4 chunks
Elements already chunked by prior knowledgeminimum 0
3

Results

Cognitive Load Ratio
1.500
Elements To Hold Simultaneously
6
Elements Beyond Capacity
2
Assessment
Overloaded - split the material into segments

Step by step

  1. 1Values used
  2. 2Effective elements
  3. 3Load ratio
  4. 4Cognitive Load Ratio= 1.500
  5. 5Elements To Hold Simultaneously= 6
  6. 6Elements Beyond Capacity= 2
  7. 7Assessment= Overloaded - split the material into segments

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why does expertise reduce cognitive load?

Because experts hold schemas in long-term memory that chunk many elements into one, freeing working memory for reasoning.

How many chunks can working memory really hold?

Cowan's review puts it near four for interacting items, well below Miller's classic seven, which applied to non-interacting digits.

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