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Are Calculators Allowed in Aptitude Tests? The Answer for Every Major UK Format
4 min read · by Nicholas Saunders · Published · Last reviewed
Short answer. Yes — on almost every numerical reasoning test used in UK graduate recruitment, a calculator is allowed, and the tests are written on that assumption. The time limits are set expecting you to have one. The exceptions are game-based assessments, where the tasks are built around mental operations, and supervised sittings, where the employer’s rules on the day apply.
But “allowed” is doing subtle work in that sentence, and the details differ by publisher. Here is the format-by-format answer, and — more usefully — why the calculator is almost never what decides your score.
Which tests allow a calculator?
| Format | Calculator | What actually constrains you |
|---|---|---|
| SHL numerical (Verify, Verify Interactive) |
Allowed | Interpretation. Verify Interactive’s chart-manipulation questions need you to read the data correctly before there is anything to compute. |
| Aon (cut-e) scales numerical | Confirmed Not stated in advance. Aon says materials are “generally not required”, that a calculator or pen and paper “is useful for some tests”, and that you are told at the test’s introduction. Have one to hand. | Speed of reading. At 37 tasks in 12 minutes you have roughly 19 seconds per task, worked across multiple data tabs. The calculator helps least exactly where the test is hardest. |
| Cappfinity assessments | Allowed for the numerical portions | Reading load. The numbers arrive inside a business scenario — interpretation-heavy, computation-light. |
| Game-based assessments (Arctic Shores and similar) |
Reported No on-screen calculator. Preparation guides advise having a separate physical one for PwC’s Career Unlocked, which adds a numerical section to the games. Arctic Shores publishes no policy. | The behavioural mini-tasks are built around mental operations under time pressure and move too fast for an external calculator to help. The numerical section some employers bolt on is a conventional data-interpretation test, and there you want one on the desk. |
| Supervised or in-person re-tests | The employer’s rules apply | Some supply an on-screen calculator instead. If you are re-tested at an assessment centre, expect the invitation to say so. |
Reported Drawn from publisher materials and consistent current candidate reports. Last verified 10 September 2026. Publishers ship multiple versions of the same test, so your invitation email and the test’s own on-screen instructions override anything you read online, including this page. Check them first.
Why is the calculator not the bottleneck?
Watch a strong candidate work a numerical question and the calculator is touched for perhaps five seconds of a forty-five-second solve. The other forty seconds go on the parts no device does for you.
- Finding the right numbers. The chart or table typically holds three times the data the question needs. Knowing what to ignore is the skill.
- Choosing the operation. Percentage change, proportion, reverse percentage — picking the wrong one invalidates a perfect calculation. The classic trap is computing a percentage change from the new value when the base is always the original.
- Units and scale. Millions versus thousands, rates versus totals, a “£m” hiding in a column header. Most of the wrong answers on offer are correct calculations of the wrong thing — the options are built from predictable misreadings.
That is why two candidates with identical GCSE maths can sit twenty percentile points apart. The test measures reading and decision speed under pressure, with arithmetic as the last step.
Should you practise with a calculator or without?
With one. Practise the way you will sit it: calculator on the desk, but train yourself to estimate first and compute second. If your estimate says “about 12 per cent”, the option saying 47 never gets a second look — and on a negative-marking format like the Aon scales tests, that discipline is the difference between a guess that costs you marks and an answer you can defend.
Practising mental arithmetic separately is still worth doing, but as a way of making the estimate step fast — not as a substitute for the tool the test assumes you have.
What should you have on the desk?
A basic calculator you already know how to use, not a phone. A phone tempts you into notifications and, in a proctored sitting, may not be permitted at all. Add a pen and paper for intermediate figures: the commonest avoidable error in a timed numerical test is holding a number in your head across three keystrokes and typing the wrong one.
Then check the invitation. Formats vary by version and by employer, and the on-screen instructions are the only rules that bind you. Which provider you are facing at all is worked out in the 2026/27 provider map.
Where to start
Find out where your forty seconds go. The free Acumen Logic Benchmark is 20 timed questions — numerical, verbal and logical — in 17 minutes, scored the way employers score. A calculator is allowed, because the real tests allow one. You get an instant estimated percentile, a section-by-section breakdown naming your weakest area, and the correct answer for every question. One attempt, ever — treat it like the real thing. What else is free is mapped on the free aptitude test practice page.
Common questions
Are calculators allowed in aptitude tests?
On almost every numerical reasoning test used in UK graduate recruitment, yes. Unsupervised online tests are written on the assumption that you have one, and the time limits are set accordingly. Sitting without a calculator is a self-imposed handicap, not extra virtue. The exceptions are game-based assessments, where the tasks are built around mental operations, and supervised sittings, where the employer’s rules on the day apply.
Can you use a calculator on an SHL test?
Yes. SHL’s numerical tests, including Verify and Verify Interactive, are designed on the assumption that a calculator is available, and an unsupervised online sitting cannot prevent it. It changes less than candidates expect: Verify Interactive’s chart-manipulation questions still require you to interpret the data before there is anything to compute.
Should you practise aptitude tests with a calculator or without?
With one, because that is how you will sit the real test. Train yourself to estimate first and compute second: if your estimate says about 12 per cent, the option saying 47 never gets a second look. On a negative-marking format such as the Aon scales tests, that discipline is the difference between a guess that costs you marks and an answer you can defend.
Acumen Logic is independent and is not affiliated with any test publisher or employer. Format details above are drawn from publisher materials and current candidate reports; always follow the instructions in your own test invitation.