Free Grade 3 Introducing Converting Units Worksheets
Free Grade 3 worksheets for Introducing Converting 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
Stretch
15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introducing converting units
Explain introducing converting units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing converting units
Calculate introducing converting units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing converting units
Compare introducing converting units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introducing converting units
Justify introducing converting 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 Converting 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 3 L to mL.[1]
- 2.Convert 7 m to cm.[1]
- 3.Convert 8 cm to mm.[1]
- 4.Convert 9 km to m.[1]
- 5.Convert 1.5 L to mL.[2]
- 6.Convert 5.7 L to mL.[2]
- 7.Convert 6.4 m to cm.[2]
- 8.Convert 1.1 km to m.[2]
- 9.Convert 1.2 km to m.[3]
- 10.Convert 6.3 cm to mm.[3]
- 11.Convert 9.1 cm to mm.[3]
- 12.Convert 8.2 m to cm.[3]
Show answers and working
1. 3000 mL
1 L = 1000 mL. 3 × 1000 = 3000 mL.
2. 700 cm
1 m = 100 cm. 7 × 100 = 700 cm.
3. 80 mm
1 cm = 10 mm. 8 × 10 = 80 mm.
4. 9000 m
1 km = 1000 m. 9 × 1000 = 9000 m.
5. 1500 mL
1 L = 1000 mL. 1.5 × 1000 = 1500 mL.
6. 5700 mL
1 L = 1000 mL. 5.7 × 1000 = 5700 mL.
7. 640 cm
1 m = 100 cm. 6.4 × 100 = 640 cm.
8. 1100 m
1 km = 1000 m. 1.1 × 1000 = 1100 m.
9. 1200 m
1 km = 1000 m. 1.2 × 1000 = 1200 m.
10. 63 mm
1 cm = 10 mm. 6.3 × 10 = 63 mm.
11. 91 mm
1 cm = 10 mm. 9.1 × 10 = 91 mm.
12. 820 cm
1 m = 100 cm. 8.2 × 100 = 820 cm.
Worked examples
Convert 7 cm to mm.
- 1 cm = 10 mm.
- 7 × 10 = 70 mm.
- Answer: 70 mm
Convert 4.9 cm to mm.
- 1 cm = 10 mm.
- 4.9 × 10 = 49 mm.
- Answer: 49 mm
Convert 2.4 m to cm.
- 1 m = 100 cm.
- 2.4 × 100 = 240 cm.
- Answer: 240 cm
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 Converting Units
One concept, one ecosystem — all of it free.
Goes deeper
The entities below this one, each with the same complete free resource set.
Sibling concepts
Related concepts
Lateral links, including across subjects.
Next topics
All free formats for this concept
Every kind below is a real page, generated from this entity.
Learn — Meet the idea.
Practice — Build fluency.
Revise — Keep it in memory.
Assess — Prove mastery.
Apply — Use it in context.
Teach — Deliver it to a class.
Frequently asked
- Is this Grade 3 Introducing Converting 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 Imperial 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 Converting Units?
- Move on to Working with Converting Units, Converting Units in Context, Metric Units, Imperial Units, which build directly on this idea.
Related resources
Stuck on Introducing Converting Units? The AI Tutor already knows this page, its prerequisites and its common mistakes.
Open the free AI Tutor