Metric units worksheets
Converting between metric units of length, mass and capacity: kilometers, meters and centimeters; kilograms and grams; liters and milliliters.
Download the free metric units worksheet (PDF)
Metric units worksheet
Mixed unit conversions: metric, customary and time
What’s on the worksheet
- 50 questions on metric units, sized for US Letter paper
- 4 pages of questions plus an answer key on the last page
- Written for grades 4–5, matching Common Core 4.MD.A.1, 5.MD.A.1
- Name and date lines at the top, and room to show the work
Sample questions from this worksheet
- Convert 5 m to cm.
- Convert 4,000 mL to L.
- Convert 2 L to mL.
- Convert 3 km to m.
- Convert 400 cm to m.
- Convert 3 L to mL.
Preview the worksheet and answer key
Make a new metric units worksheet
Need another page for extra practice, a retake or a second group in class? The free Mathify Kids test maker builds a fresh metric units worksheet with different numbers every time. Choose Core, Standard or Challenge level, print it with its own answer key, or let your child take it on screen and see the score straight away.
Metric units: a worked example (3.5 km to meters and 250 cm to meters)
- 1 km = 1,000 m, so 3.5 km = 3.5 × 1,000 = 3,500 m.
- 100 cm = 1 m, so 250 cm = 250 ÷ 100 = 2.5 m.
- Big unit to small unit: multiply. Small to big: divide.
How to use it at home and in class
At home
Remember the prefixes: kilo means 1,000, centi means a hundredth and milli means a thousandth. Ten problems a day works better than a whole sheet at once. Mark them together with the answer key, then ask your child to explain one they got wrong: finding the mistake themselves is where the learning happens.
In class
Use the first row as a warm-up, a full page for independent practice, or five questions as an exit ticket. For a retake or a second group, make a new version with the test maker so every child gets different numbers.
Mistakes to watch for
- Multiplying when the answer should get smaller.
- Mixing up centi (100) and milli (1,000).
What to practice before and after metric units
- Before: money. If this sheet is a struggle, go back a step.
- After: customary units, once this one is mostly right.
- Learn it first: the metric units lesson and the measurement chart.
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Questions parents ask
How do you convert metric units?
Multiply or divide by 10, 100 or 1,000. Going to a smaller unit makes the number bigger, so multiply.
What grade is this metric units worksheet for?
It is written for grades 4–5 and matches Common Core standards 4.MD.A.1, 5.MD.A.1.
Can I get a different version of this metric units worksheet?
Yes. Use the free Mathify Kids test maker to make a new metric units worksheet with different numbers every time, at Core, Standard or Challenge level, with its own answer key.