What this test measures
This is a digit span task, one of the oldest measures in cognitive psychology and still a component of standard IQ batteries. A number appears for a few seconds, disappears, and you type it back exactly. Each correct answer adds one digit. Your score is the longest number you reproduced without error.
Clinical digit span for adults averages around seven forwards, but browser versions consistently produce higher numbers because the display time scales with length, there is no examiner pacing you, and most people rehearse the digits aloud. Nine is a reasonable expectation here, and scores in the mid-teens are almost always the result of grouping digits into pairs or triples.
Your best stays on this device. Open Your bench to see recent runs.
Average scores
| Digits recalled | Level |
|---|---|
| Under 6 | Below average |
| 6 – 8 | Approaching average |
| 9 – 10 | Around average |
| 11 – 13 | Good |
| 14 – 16 | Very good |
| 17+ | Exceptional, almost certainly chunked |
| Strategy | Typical gain |
|---|---|
| Reading digits aloud | +1 to 2 digits |
| Grouping into pairs or triples | +2 to 4 digits |
| Mapping groups to known numbers | +3 to 5 digits |
| No strategy at all | baseline, around 7 |
How to improve your score
- Group the digits into twos or threes. Nobody holds fourteen separate digits. They hold five chunks of two or three, which is well within normal span. Grouping is the whole game here.
- Say the number out loud as it appears. The phonological loop rehearses sound better than sight. Speaking the digits creates an auditory trace that survives the gap far better than a purely visual one.
- Attach meaning to the chunks. A pair that happens to be a year, an age, or a familiar number is stored almost for free. Competitive memorisers do a systematic version of this, but the informal version works too.
- Rehearse continuously during the blank moment. The gap between the number disappearing and your typing is where scores are lost. Keep the digits cycling in your head rather than pausing.
- Type immediately and do not second-guess. The trace decays in seconds. Hesitating over whether the third digit was a 4 or a 7 usually costs you the digits after it as well.
For the full set of techniques, from chunking to the major system and the memory palace, with a two week practice plan, see the guide on how to remember numbers.
How many numbers can the average person remember?
The short answer is about seven, and that figure has a long history. George Miller's 1956 paper put the limit of immediate recall at seven items give or take two, and digit span has been used as a working memory measure ever since. That number describes raw span with no strategy applied: hearing a string once and repeating it straight back.
In practice most people score higher than their clinical span on a browser test, and the reasons are mechanical rather than flattering. The digits stay on screen longer as the string grows, nobody is pacing you, you can say them out loud, and you can take the test as many times as you like. A score of nine or ten here is closer to average than a score of seven, which is why the tiers on this page sit above the textbook figure.
The ceiling is not fixed either. Span rises sharply the moment you stop treating digits as individual items and start treating them as groups, which is why scores in the mid teens are common among people who have practised and rare among people who have not.
What a digit span score does and does not tell you
Digit span is a genuine component of standard IQ batteries, and it correlates with working memory capacity. It is not an IQ score on its own, and a single run on a web page is not an assessment of anything. Span varies with sleep, caffeine, stress, how much noise is around you and whether you happen to be rehearsing well that day, and a two digit swing between runs is entirely ordinary.
It also measures a narrow thing. Holding a string of digits for a few seconds is short term verbal memory. It says little about whether you remember faces, routes, conversations or anything you learned last week, all of which run on different systems. People often score poorly here and have excellent memory in daily life, and the reverse happens too.
If you want the number to mean something, take it several times across different days and use your own median rather than your best run. That is a far more stable figure than a personal best, which by definition is your luckiest attempt.
Frequently asked questions
What is the average number memory score?
Around 9 digits on a test of this format. Clinical digit span averages closer to 7, but the lower figure comes from a stricter procedure with fixed presentation timing.
Is 7 digits normal?
Yes. Seven is the classic short-term memory span and is entirely normal. It is also, not coincidentally, the length of a local phone number in many countries.
How do people reach 15 or more digits?
By chunking. Fifteen digits stored as five groups of three is five items, which fits comfortably in working memory. Nobody stores fifteen independent digits.
Does a low score mean my memory is bad?
No. This measures short-term verbal span under time pressure, which is a narrow capacity distinct from long-term memory, recognition memory, and everything else people usually mean by memory. A low score on a browser test is not diagnostic of anything.
Why does the number stay on screen longer as it gets longer?
So that encoding time scales with the amount of material. A fixed display time would turn the test into a reading speed measurement once the numbers got long.
How many digits can the average person remember?
Around seven with no strategy, which is the classic figure from Miller's work on immediate recall. On a browser test most people reach nine or ten, because the digits stay visible longer as the string grows and there is nothing stopping you rehearsing them aloud.
Is the number memory test an IQ test?
No. Digit span is one component of some IQ batteries and it correlates with working memory, but a single run on a web page measures neither IQ nor general memory. It measures how long a string of digits you can hold for a few seconds.
How can I improve my number memory?
Group the digits rather than reading them one at a time. Decide before the number appears whether you will read it in pairs or in triples, say it out loud between seeing it and typing it, and attach meaning to groups where you can, like a year, an age, a familiar pair. Chunking is worth several digits; trying harder is worth none.