The working memory capacity test measures your digit span — how many numbers you can hold in mind and recall. Test both forward recall (repeat in order) and backward recall (repeat in reverse). Results compare to adult population norms.
Two Test Modes
See digits one by one, then type them in the same order. Starts at 3 digits, increases to 9.
See digits one by one, then type them in reverse order. Starts at 2 digits, increases to 8.
Working Memory Results
This tool provides a general self-assessment for educational purposes only. It is not a clinical diagnostic instrument. For professional evaluation, consult a qualified psychologist or healthcare provider.
How to Use the Working Memory Capacity Test
Working memory is the mental workspace where you hold and manipulate information in the moment. It differs from long-term memory in that it only lasts seconds without rehearsal. Digit span tests are one of the most reliable and validated measures of working memory capacity.
What the forward span tests
Forward digit span measures the capacity of your phonological loop — the system that briefly stores verbal/auditory information. Digits are presented one at a time; you hold each in working memory while the next appears, then recall them in order. Most adults can reliably recall 7±2 digits.
What the backward span tests
Backward digit span requires you to mentally reverse the order before responding. This adds an executive function component — you must both hold the sequence and manipulate it. Backward span is generally 1-2 digits shorter than forward span. A large difference between forward and backward span may suggest difficulty with executive processing.
How to interpret your score
Forward span below 5 is below average; 5-9 is within normal range; above 9 is exceptional. Backward span below 3 is below average; 3-7 is normal; above 7 is exceptional. Note that chunking strategies (grouping digits into meaningful clusters) can increase effective span.
This tool provides a general self-assessment for educational purposes only. It is not a clinical diagnostic instrument. For professional evaluation, consult a qualified psychologist or healthcare provider.
Frequently Asked Questions
Is this working memory test free?
Yes, completely free with no signup required. The test runs entirely in your browser.
Is my data private?
Yes. No data is sent to any server. Everything runs locally in your browser.
What is a normal digit span?
For adults, the average forward digit span is 7±2 digits (most adults can recall 5 to 9 digits). The average backward digit span is typically 2 shorter — around 5±2. Digit span tends to peak in young adulthood and gradually declines slightly with age.
What does working memory affect in daily life?
Working memory is crucial for following multi-step instructions, doing mental arithmetic, holding information while reading, and managing complex tasks. It is strongly linked to academic performance and is often affected in conditions like ADHD and dyslexia.
How can I improve my working memory?
Evidence-based approaches include: dual n-back training (shown to transfer to other working memory tasks), regular aerobic exercise (improves prefrontal cortex function), adequate sleep (memory consolidation happens during sleep), and reducing cognitive load through organization and note-taking strategies.