Unit Conversions Practice Test Worksheets
Build confidence with printable metric unit conversion worksheets and focused maths practice tests. Students learn to convert between millimetres, centimetres, metres, kilometres, grams, kilograms, tonnes, millilitres, and litres while improving accuracy with multi-step measurement word problems.
For students who know the metric units, but need practice choosing the right operation inside word problems.
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The Rules Every Unit Conversion Question Uses
These worksheets combine metric conversion facts with real-world totals and sharing. Most questions ask students to decide whether to multiply, divide, or convert before choosing from five answer options.
Rule 1: Know the conversion scale
Use the metric steps before doing anything with the answer options.
Example: 1 cm = 10 mm, 1 m = 100 cm, 1 km = 1000 m, 1 l = 1000 ml, and 1 kg = 1000 g.
Rule 2: Smaller units make bigger numbers
When converting from a larger unit to a smaller unit, multiply by the conversion factor.
Example: 0.25 kg = 0.25 × 1000 = 250 g.
Rule 3: Larger units make smaller numbers
When converting from a smaller unit to a larger unit, divide by the conversion factor.
Example: 6000 mg = 6000 ÷ 1000 = 6 g.
Rule 4: Do the word-problem step first
Some questions ask for a total, while others ask for each share. Work that out before converting.
Example: 8 l shared between 10 mugs is 0.8 l each, then 0.8 × 1000 = 800 ml.
3 Worked Unit Conversion Examples
One total, one sharing problem, and one classic place-value trap.
1. Convert a Total from Millimetres to Centimetres
Question: Suresh collected 4 nails, each measuring 17 mm. How many centimetres did he collect in total?
Worked Method
Step 1: Find the total length first: 4 × 17 mm = 68 mm.
Step 2: Convert millimetres to centimetres. Since 1 cm = 10 mm, divide by 10.
Step 3: 68 ÷ 10 = 6.8 cm.
Tip: The total comes before the conversion because each nail is given separately.
2. Share Litres, Then Convert to Millilitres
Question: Sunil has 8 l of soup. He pours it equally into 10 mugs. How many millilitres of soup are in each mug?
Worked Method
Step 1: Find each share in litres: 8 ÷ 10 = 0.8 l.
Step 2: Convert litres to millilitres. Since 1 l = 1000 ml, multiply by 1000.
Step 3: 0.8 × 1000 = 800 ml.
Tip: Do not convert the whole 8 l and stop. The question asks for the amount in each mug.
3. Divide First, Then Convert Small Units to Larger Units
Question: Two identical small buttons have a combined mass of 12000 mg. How many grams does each small button weigh?
Worked Method
Step 1: Find the mass of each button in milligrams: 12000 ÷ 2 = 6000 mg.
Step 2: Convert milligrams to grams. Since 1000 mg = 1 g, divide by 1000.
Step 3: 6000 ÷ 1000 = 6 g.
Tip: A tempting wrong answer is 6000 g. The number must get smaller when milligrams become grams.
Before You Buy
Want to check the level and layout first? Download the free 3-question sample. It uses the same question style, printable format, and answer-key approach as the full pack.
Download Free Sample PDFGet the Full Practice Pack
The full Unit Conversions pack contains 90 multiple-choice questions across 3 printable test sets. Students practise length, mass, capacity, metric conversion facts, totals, sharing, and decimal place-value accuracy.
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