A short term memory test measures how much information you can hold for a few seconds right after seeing it. On this test, a number flashes, then disappears, and you recall it. Each round adds a digit, so it keeps stretching your span until you reach your limit. Your score is the longest string you hold onto correctly.
What short-term memory is
Short-term memory is the brief holding space for whatever you’re paying attention to right now. It keeps information alive for seconds, not minutes, and it has a small, fixed capacity. Repeat a phone number to yourself and you’re using it. Stop rehearsing for a moment and the number slips.
The classic figure comes from George Miller’s 1956 paper, which put the limit at about seven items, plus or minus two. Later work by Nelson Cowan argued the true number is closer to four when you can’t rehearse. Either way, the store is small on purpose. It holds just enough to get through the next few seconds.
What this short-term memory test measures
It measures your span: the most you can keep active before it fades. Because we use a growing number string, the test finds the exact point where your short-term store fills up.
Short-term memory is where information waits before it either gets forgotten or moves into longer storage. This test looks only at the holding stage. It doesn’t tell you how well you’ll remember something tomorrow, which is a different system.
How the short-term memory test is scored
Your score is the longest number you recall correctly. Most adults reach about 7. Typical results cluster in the range around 6 to 8. Going past 9 is uncommon.
The tool shows your band:
| Band | Score | Percentile |
|---|---|---|
| Below average | Under 6 digits | Bottom 25% |
| Average | 6 to 8 digits | 25th to 75th percentile |
| Above average | 8 to 9 digits | 75th to 95th percentile |
| Exceptional | 9 digits and up | Top 5% |
Check the typical range on the average short term memory score page, or find your rank on the short term memory percentiles page.
How to improve short-term recall
Short-term capacity is fairly fixed, but focus and technique change your score:
- Remove distractions first. Short-term memory is fragile. A single interruption can wipe the whole string.
- Chunk the input. Group digits into threes or fours so you carry fewer units.
- Rehearse in a loop. Quiet repetition keeps items alive until you need them.
- Sleep on it. Poor sleep drags short-term performance down measurably. This is the cheapest fix there is.
To move information from short-term into lasting memory, see how to improve memory. For a stricter clinical version of this span task, try the digit span test. Or take the test.
Frequently asked questions
What is a normal short-term memory span?
Most adults hold about 7 items in short-term memory. Results in the middle range, roughly 6 to 8, are normal. This matches the long-standing finding that the store holds around seven items, or fewer when you can’t rehearse. See the average score page for context.
How long does short-term memory last?
Only seconds, unless you keep rehearsing. Without active repetition, most information fades within about 15 to 30 seconds. That’s by design: short-term memory holds what you need right now, then clears space. Anything you want to keep has to move into long-term memory through attention and repetition.
Is short-term memory the same as working memory?
They overlap but differ. Short-term memory is passive storage, holding information as is. Working memory holds and manipulates it, like doing math in your head. This test measures the storage side. For the active version, try the working memory test.
Should I worry if my short-term memory feels bad?
Everyday forgetfulness, walking into a room and forgetting why, is normal and usually reflects divided attention, not memory loss. This test is not a medical diagnosis. If forgetfulness is getting worse or affecting daily life, talk to a doctor rather than relying on any online test.