Free Grade 3 Introducing Imperial Units Worksheets
Free Grade 3 worksheets for Introducing Imperial Units: 12 real questions with a full answer key and worked solutions. Metric units change by powers of 10: 10 mm in a cm, 100 cm in a m, 1000 m in a km. Multiply to convert to a smaller unit, divide to convert to a bigger one.
Free
Core
20 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introducing imperial units
Explain introducing imperial units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing imperial units
Calculate introducing imperial units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing imperial units
Compare introducing imperial units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introducing imperial units
Justify introducing imperial units accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Introducing Imperial Units works
Metric units change by powers of 10: 10 mm in a cm, 100 cm in a m, 1000 m in a km. Multiply to convert to a smaller unit, divide to convert to a bigger one.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.Convert 2 L to mL.[1]
- 2.Convert 2 m to cm.[1]
- 3.Convert 2 km to m.[1]
- 4.Convert 4 cm to mm.[1]
- 5.Convert 5.1 cm to mm.[2]
- 6.Convert 7 cm to mm.[2]
- 7.Convert 5.5 km to m.[2]
- 8.Convert 6.6 km to m.[2]
- 9.Convert 5.4 L to mL.[3]
- 10.Convert 2.2 L to mL.[3]
- 11.Convert 1.2 km to m.[3]
- 12.Convert 7.8 kg to g.[3]
Show answers and working
1. 2000 mL
1 L = 1000 mL. 2 × 1000 = 2000 mL.
2. 200 cm
1 m = 100 cm. 2 × 100 = 200 cm.
3. 2000 m
1 km = 1000 m. 2 × 1000 = 2000 m.
4. 40 mm
1 cm = 10 mm. 4 × 10 = 40 mm.
5. 51 mm
1 cm = 10 mm. 5.1 × 10 = 51 mm.
6. 70 mm
1 cm = 10 mm. 7 × 10 = 70 mm.
7. 5500 m
1 km = 1000 m. 5.5 × 1000 = 5500 m.
8. 6600 m
1 km = 1000 m. 6.6 × 1000 = 6600 m.
9. 5400 mL
1 L = 1000 mL. 5.4 × 1000 = 5400 mL.
10. 2200 mL
1 L = 1000 mL. 2.2 × 1000 = 2200 mL.
11. 1200 m
1 km = 1000 m. 1.2 × 1000 = 1200 m.
12. 7800 g
1 kg = 1000 g. 7.8 × 1000 = 7800 g.
Worked examples
Convert 8 m to cm.
- 1 m = 100 cm.
- 8 × 100 = 800 cm.
- Answer: 800 cm
Convert 8.6 L to mL.
- 1 L = 1000 mL.
- 8.6 × 1000 = 8600 mL.
- Answer: 8600 mL
Convert 4.3 km to m.
- 1 km = 1000 m.
- 4.3 × 1000 = 4300 m.
- Answer: 4300 m
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Divides when converting to a smaller unit.
Correction: Smaller units mean more of them — multiply.
Uses 100 for every conversion.
Correction: Learn which pairs use 10, 100 or 1000.
Teacher tips
- · Keep a conversion staircase on the wall.
Parent tips
- · Weigh fruit at the shop and convert kg to g.
Real-life applications
- · Cooking, measuring height, reading road signs.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
Every free resource for Introducing Imperial Units
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Frequently asked
- Is this Grade 3 Introducing Imperial Units worksheet really free?
- Yes. Every worksheets on FreeMathWorksheet is free to use, print and share — no account, no paywall and no watermark.
- What should a learner already know before this?
- Start with Metric Units. Each one has its own free lesson, worksheet and quiz.
- How is the worksheet sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Introducing Imperial Units?
- Move on to Working with Imperial Units, Imperial Units in Context, Metric Units, Converting Units, which build directly on this idea.
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