Customary units worksheets
Converting between US customary units: inches, feet and yards; ounces and pounds; cups, pints, quarts and gallons.
Download the free customary units worksheet (PDF)
Customary length conversions worksheet
Mixed unit conversions: metric, customary and time
What’s on the worksheet
- 20 questions on customary units, sized for US Letter paper
- 2 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 3 feet to inches.
- Convert 36 inches to feet.
- Convert 18 feet to yards.
- Convert 60 inches to feet.
- Convert 7 yards to feet.
- Convert 27 feet to yards.
Preview the worksheet and answer key
Make a new customary 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 customary 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.
Customary units: a worked example (3 ft to inches, 2 gal to quarts and 5 lb to ounces)
- 1 ft = 12 in, so 3 ft = 36 in.
- 1 gal = 4 qt, so 2 gal = 8 qt.
- 1 lb = 16 oz, so 5 lb = 80 oz.
How to use it at home and in class
At home
Keep a conversion chart visible. These facts need memorizing, and seeing them often helps. 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
- Using 10 or 100 as if these were metric units.
- Dividing when converting to a smaller unit.
What to practice before and after customary units
- Before: metric units. If this sheet is a struggle, go back a step.
- Learn it first: the customary units lesson and the measurement chart.
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Questions parents ask
Why are customary conversions harder than metric?
Metric units all go up in tens. Customary units use different numbers: 12 inches in a foot, 3 feet in a yard, 16 ounces in a pound.
What grade is this customary 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 customary units worksheet?
Yes. Use the free Mathify Kids test maker to make a new customary units worksheet with different numbers every time, at Core, Standard or Challenge level, with its own answer key.