3rd grade liquid volume and mass worksheets

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Liquid volume and mass worksheets for third grade come in two kinds. One shows a schematic scale, a container marked in liters or a weight scale marked in grams or kilograms, and asks for the reading, and mixes in estimates: about how much does a mop bucket hold, about how much does a hardcover book weigh. The other gives one-step word problems in grams, kilograms, and liters to solve. Six problems per sheet, and every print draws new readings, objects, and situations.

Free printable PDF worksheet, aligned to Common Core 3.MD.A.2.

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The kind of problems you'll get

Read the instrument. Then solve the problem and include the unit.

  1. A jug has 2 liters. You add 3 liters. How much is in the jug?

    Answer: 5 liters.

Most problems on this sheet sit beside a picture, model or diagram, so this is the worked example the sheet itself prints. The answer key on page two prints the answer under every problem.

Every print pulls a fresh set of problems at this level, so a make-up test or a second sibling never gets the same sheet.

What's on a 3rd grade sheet

Every version prints on US Letter or A4, with its answer key after the problems.

How to teach this

On a scale reading, have your student say the two marked numbers on either side of the pointer and then count the ticks between them. That one habit removes most errors. For the estimates, build a few anchors at home: a liter bottle of water, a kilogram bag of sugar or rice, a gram from a paper clip. Everything on the sheet is compared against anchors like these. The drawings are schematic, so the reading comes from the printed scale and never from the size of the picture. For the word problems, ask what unit the answer needs before any arithmetic.

Watch for: Students read the number nearest the pointer instead of counting ticks from the last marked number. Find what one tick is worth first. Students choose grams for anything they can lift. A liter of water weighs about a kilogram; a chair weighs several. Grams are for things like a pencil or a slice of bread. Students add when the problem says each and multiply when it says altogether. Read the question twice and say what is being asked before computing.

Common questions about 3rd grade liquid volume and mass

Which units are used?
Grams and kilograms for mass, and liters for liquid volume, the three units in the third grade standard. No conversions between units are asked here; that is the fourth grade metric conversion page.
Are the pictures drawn to scale?
No, and each sheet says so. A scale reading comes from the marks and numbers printed on it, so a home printer that shrinks the page cannot change the answer.
How are the estimates graded?
Each estimate offers three choices a factor of ten apart, like 60 grams, 600 grams, and 6 kilograms. Only one is sensible for the object, so the answer key is exact.
What do the word problems look like?
One step each, in the units of the sheet: a total for several equal amounts, what is left after some is used, or how much more one container holds than another. The arithmetic stays easy so the units and the situation get the attention.

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Aligned to Common Core 3.MD.A.2. Reviewed by the One more sheet team. Content version 241, updated September 2026.

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