(300+ Sample Questions & Answers for Nursing Drug Dosage Calculation & Nursing Tests)

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If you work in the healthcare industry especially within the nursing profession or as a carer, you will be responsible for administering drugs and medication to patients. For the health services to ensure that their staff are fully proficient in this, you will be required to undertake and pass a drug dosage calculation test. There are a wide range of different formulas which need to be adhered to when administering medication and this resource contains examples of all of the various calculations required, each with their own explanations and walkthrough guides.


Drug dosage calculation tests are used by health organisations such as the NHS to assess the mathematical skills of healthcare professionals, who are tasked with the responsibility of administering drugs and medication to patients.

To be able to pass this test, you will be required to have a sound knowledge of basic arithmetic skills and be able to convert different formulas such as measures of volume to liquid format competently. A drug calculation can also be patient type specific, such as by bodyweight or age.

You will find over 300 + practice questions and answers for all of the different types of drug calculations you will be assessed against in this comprehensive testing resource.


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The nursing calculation test is designed to assess a candidate’s suitability to carry out the task of administering different forms of drugs and medications to patients.

For example, if you are a nurse or healthcare assistant in the NHS, you will have to carry out quick and accurate numeracy calculations when prescribing medication or check a patient’s blood pressure correctly.

As you can imagine, working in the NHS, regardless of the healthcare role you occupy, speed and accuracy of working are vital and the Nursing Drug Calculation test assesses your competency in these areas.

What is the Nursing Calculation Test 

The nursing calculation test element of the NHS includes basic mathematical calculations, including addition, multiplication, subtraction, division and weights & measure conversion. Some of the test questions will also require you to convert decimals to fractions, and also fractions to decimals.

You will also be assessed against patient specific requirements, such as the correct amount of medication based on the patients body weight, or by a patients age which is common with caring for children (paediatrics).

What is the purpose of the Nursing Calculations test?

The role of key healthcare workers is fundamental to the safety and wellbeing of patients. Therefore, medical calculations, speed of work, and attention to detail are vital components of all healthcare job roles. If a nursing job applicant does not have the basic numeracy skills needed to carry out the role, it could potentially put patients and co-workers in danger.

For example, if a doctor, nurse, or healthcare worker is prescribing medication in their daily duties it is absolutely crucial the work they carry out is accurate. If it isn’t, the wrong medication or the wrong dose or quantity of medication could be administered. Each healthcare service has a clear set of values that include a commitment to quality of care. Nurses are trusted by patients to provide quality care that is safe, and effective every time.

What is the best way to prepare for the nursing Drug Dosage Calculation test?

In our experience, and having consulted several previous nursing applicants, the most effective way to prepare is to undertake numerous sample nursing calculations  test questions under timed conditions. By practicing under timed conditions it enables you to improve your scores dramatically. When preparing for the Nursing Calculations test, follow these 3 simple steps:

STEP 1: Obtain examples of Nursing test questions. Read them and gain an understanding of the format. If you understand the style of questions you will have to answer, the real test will be less daunting.

STEP 2: Practice sample nursing calculations test questions regularly in the build-up to the real test. Little and often is far better than cramming the night before your test.

STEP 3: The most important step when preparing for your assessment test is to make sure you practice the nursing calculations test questions under strict timed conditions. During the real test, you will undoubtedly be nervous. By practicing numerous multiple-choice example questions under tined conditions it helps to increase your speed of working and competency levels.


Below, are several examples of test questions that are designed to help you prepare for your real nursing drug dosage calculation test. It does not matter if you are applying to become a nurse, a healthcare worker, a healthcare assistant or a doctor. If you are responsible for to administering and prescribing medication, accuracy is vital for the well-being of the patient.



A patient has been prescribed 75 milligrams (mg) of Tramadol each day. How many milligrams will the patient take each week?

Example NHS Numeracy Test 01

A. 375mg
B. 750mg
C. 525mg
D. 252mg

ANSWER = C. 525mg

A patient has been prescribed the following medication. How many milligrams in total will the patient take in 10 days?

A. 5,050mg
B. 4,750mg
C. 4,900mg
D. 5,600mg

ANSWER = C. 4,900mg

Read the following information before answering the question.

A patient has been prescribed 2.5g of a blood thinning medication. The stock tablets 200mg each. How many tablets should you prescribe the patient?

A. 11 tablets
B. 13 tablets
C. 12 tablets
D. 12.5 tablets

Answer: D, 12.5 tablets. EXPLANATION = The first step is to convert the grams to mg. To do this 2.5 x 1,000 = 2,500.

2,500 ÷ 200 = 12.5

Read the following information before answering the question.

Over the next 10 hours, a patient is to receive 2 litres of fluids. What is the flow rate per hour?

A. 150 ml/hr

B. 225 ml/hr

C. 200 ml/hr

D. 180 ml/hr

Answer: C, 200 ml/hr. EXPLANATION = 2,000 ÷ 10 = 200.

Now INSTANTLY access the full practice tests online containing 300+ Nursing Calculations Assessment Questions & Answers!

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300+ NURSING CALCULATIONS test quesrtions designed to help you effectively prepare for the nursing calculations assessment!


Fully worked solutions/answers to all of the questions to ensure you gain an advantage and pass.


In-depth guidance on each of the different formulas required for drug calculations.


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✓ Weights and Measure conversion chart included
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✓ In-depth guidance and walkthrough on how to work out each of the different types of nursing calculation tests
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