Converting Customary Units Worksheets

Free printable worksheets with answer keys. Pick a level, preview the questions, then open the sheet to swap or delete any single question.

Grade 4CCSS 4.MD.A.1Answer key includedPDF · Print

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Easy: Feet, yards, gallons and quarts

Preview shows 6 of 12 questions. Every sheet is new; open it to change any question.

Worksheet variations

Learn the key facts: 1 ft = 12 in, 1 yd = 3 ft, 1 gal = 4 qt, 1 qt = 2 pt, 1 lb = 16 oz, 1 h = 60 min and 1 min = 60 s. To change to the smaller unit, multiply by how many small units make one large unit. For a mixed measure, convert the large part and add the small part.

EasyFeet, yards, gallons and quarts MediumPounds, hours and minutes HardMixed measures, such as 5 ft 7 in

How to solve it: a worked example

Convert to the smaller unit.

Start
Then
Multiply by 12
Answer

Common mistakes to watch for

Using 10 or 100 as with metric units, so 3 ft becomes 30 in.
Dividing instead of multiplying when changing to a smaller unit.
In 2 lb 5 oz, forgetting to add the 5 oz after converting the pounds.

Tip: tick “Step-by-step answer key” in the generator to print each step for marking.

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FAQ

Which customary conversions should students know?

1 foot = 12 inches, 1 yard = 3 feet, 1 gallon = 4 quarts, 1 quart = 2 pints, 1 pound = 16 ounces, 1 hour = 60 minutes and 1 minute = 60 seconds.

How do you convert 5 ft 7 in to inches?

Multiply the feet by 12 and add the inches: 5 × 12 = 60, and 60 + 7 = 67 inches.

Is every worksheet different?

Yes. Numbers are generated each time, and the answer key is calculated for that sheet. Swap any single question and its answer updates too.

Can I mix converting customary units with other skills?

Yes. In the generator, add more skills; each gets its own section on the sheet with its own instructions.

Is it free to print?

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