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20 Dose-by-Weight Practice Questions

Practise multiplying a fictional weight by a fictional amount per kilogram. These exercises do not include maximum doses, age adjustments, indications or organ-function considerations.

Educational boundary

Use fictional or tutor-provided values only. These pages explain arithmetic and do not select, recommend, verify or administer treatment. Do not enter patient information or use DosePractice in a clinical workflow.

Formula

calculated amount = weight in kg × amount per kg

How to use these questions

Work each question on paper or in a separate note before opening the answer. Keep the units beside every number and write the formula before substituting values.

The questions are deliberately fictional and test arithmetic only. Real medicines, patient factors, limits, local policy and equipment checks are outside DosePractice’s purpose.

A repeatable checking method

Identify what the question asks for and write its unit.
Convert time or measurement units before calculating.
Substitute values into the displayed formula.
Estimate whether the answer should be larger or smaller than the starting values.
Reveal the worked answer and compare every step, not only the final number.

20 practice questions

Try each fictional arithmetic question before opening its worked answer. Each item has a stable question ID and reporting link.

seo-dbw-001Content 0.9.2.4-prelaunchReport this question
A fictional weight is 70 kg and the exercise uses 2 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
70 × 2 = 140 mg
Mathematical result for this practice example: 140 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-002Content 0.9.2.4-prelaunchReport this question
A fictional weight is 62.5 kg and the exercise uses 1.2 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
62.5 × 1.2 = 75 mg
Mathematical result for this practice example: 75 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-003Content 0.9.2.4-prelaunchReport this question
A fictional weight is 48 kg and the exercise uses 0.5 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
48 × 0.5 = 24 mg
Mathematical result for this practice example: 24 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-004Content 0.9.2.4-prelaunchReport this question
A fictional weight is 80 kg and the exercise uses 1.5 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
80 × 1.5 = 120 mg
Mathematical result for this practice example: 120 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-005Content 0.9.2.4-prelaunchReport this question
A fictional weight is 55 kg and the exercise uses 3 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
55 × 3 = 165 mg
Mathematical result for this practice example: 165 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-006Content 0.9.2.4-prelaunchReport this question
A fictional weight is 72 kg and the exercise uses 0.25 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
72 × 0.25 = 18 mg
Mathematical result for this practice example: 18 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-007Content 0.9.2.4-prelaunchReport this question
A fictional weight is 90 kg and the exercise uses 0.8 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
90 × 0.8 = 72 mg
Mathematical result for this practice example: 72 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-008Content 0.9.2.4-prelaunchReport this question
A fictional weight is 37.5 kg and the exercise uses 2.4 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
37.5 × 2.4 = 90 mg
Mathematical result for this practice example: 90 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-009Content 0.9.2.4-prelaunchReport this question
A fictional weight is 64 kg and the exercise uses 1.25 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
64 × 1.25 = 80 mg
Mathematical result for this practice example: 80 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-010Content 0.9.2.4-prelaunchReport this question
A fictional weight is 45 kg and the exercise uses 2 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
45 × 2 = 90 mg
Mathematical result for this practice example: 90 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-011Content 0.9.2.4-prelaunchReport this question
A fictional weight is 100 kg and the exercise uses 0.6 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
100 × 0.6 = 60 mg
Mathematical result for this practice example: 60 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-012Content 0.9.2.4-prelaunchReport this question
A fictional weight is 52 kg and the exercise uses 1.75 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
52 × 1.75 = 91 mg
Mathematical result for this practice example: 91 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-013Content 0.9.2.4-prelaunchReport this question
A fictional weight is 68 kg and the exercise uses 0.5 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
68 × 0.5 = 34 mg
Mathematical result for this practice example: 34 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-014Content 0.9.2.4-prelaunchReport this question
A fictional weight is 42 kg and the exercise uses 1.5 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
42 × 1.5 = 63 mg
Mathematical result for this practice example: 63 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-015Content 0.9.2.4-prelaunchReport this question
A fictional weight is 76 kg and the exercise uses 2.5 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
76 × 2.5 = 190 mg
Mathematical result for this practice example: 190 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-016Content 0.9.2.4-prelaunchReport this question
A fictional weight is 88 kg and the exercise uses 0.75 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
88 × 0.75 = 66 mg
Mathematical result for this practice example: 66 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-017Content 0.9.2.4-prelaunchReport this question
A fictional weight is 33 kg and the exercise uses 3 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
33 × 3 = 99 mg
Mathematical result for this practice example: 99 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-018Content 0.9.2.4-prelaunchReport this question
A fictional weight is 60 kg and the exercise uses 1.1 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
60 × 1.1 = 66 mg
Mathematical result for this practice example: 66 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-019Content 0.9.2.4-prelaunchReport this question
A fictional weight is 84 kg and the exercise uses 1.25 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
84 × 1.25 = 105 mg
Mathematical result for this practice example: 105 mg
Check the operation order, unit conversion and final unit before moving on.
seo-dbw-020Content 0.9.2.4-prelaunchReport this question
A fictional weight is 50 kg and the exercise uses 0.4 mg/kg. What is the calculated amount?
Show worked answer
Formula or method: calculated amount = weight in kg × amount per kg
Substitution and working:
50 × 0.4 = 20 mg
Mathematical result for this practice example: 20 mg
Check the operation order, unit conversion and final unit before moving on.

Continue practising

Open Dose by Weight Open formula guide Open interactive quiz

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Content status and sources

This page is an original DosePractice public-beta learning resource. It remains subject to continuing educational, regulatory and editorial review; corrections are published when issues are identified.

Nursing and Midwifery Council programme standards require health numeracy assessment related to medicine calculation, but DosePractice is not an NMC assessment or approved programme.
Formula presentation should be independently reviewed against current tutor-approved or institutional teaching material before search indexing is enabled.

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