4th Grade Measurement Units and Conversions Worksheets with Answers (Free PDF)

4th grade measurement conversions worksheet – Maths PDF

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This 4th grade measurement conversions worksheet covers measurement units and conversions (Common Core 4.MD.A.1, 4.MD.A.2), with a free PDF to print.

Key takeaway: This worksheet helps fourth grade students practice converting between units of length, mass, liquid volume, weight, and time, and solving real problems with them.

Topic: Measurement Units and Conversions (4th grade)
Content: 20 worksheet problems, from easy to challenging
Standards: 4.MD.A.1, 4.MD.A.2
Answers: On a separate page, so you can try every worksheet problem first
Format: Free printable PDF, US Letter, black and white

This worksheet helps fourth grade students practice converting between units of length, mass, liquid volume, weight, and time, and solving real problems with them. Also, double number lines, tables, and blocks show why the numbers change.

There are 20 problems. The first seven convert a single unit, such as kilometers to meters or hours to minutes. Also, the next seven use mixed units, tables, and comparisons. The last six are word problems about a hiking trail, a milk bottle, a movie, a backpack, ribbon, and baking time. Allow about 35 minutes, and keep your conversion card handy.

These 20 problems practice changing larger units into smaller units: kilometers to meters, kilograms to grams, liters to milliliters, pounds to ounces, and hours to minutes. The skills match Common Core 4.MD.A.1 and 4.MD.A.2.

Also, the first problems are quick conversions. The last six are word problems about trails, milk, movies, backpacks, ribbon, and baking.

Grade 4 · Common Core State Standards: 4.MD.A.1, 4.MD.A.2

4th grade measurement conversions worksheet: worksheet problems 1 to 10

1 – Kilometers to meters

First, convert $4\text{ km}$ to meters.

2 – Meters to centimeters

Next, convert $7\text{ m}$ to centimeters.

3 – Kilograms to grams

Then, look at the blocks. Convert $3\text{ kg}$ to grams.

Each block is 1 kg = 1,000 g.

4 – Liters to milliliters

Now, convert $5\text{ L}$ to milliliters.

5 – Pounds to ounces

Also, convert $2\text{ lb}$ to ounces.

6 – Hours to minutes

First, use the double number line to find how many minutes are in $3\text{ hr}$.

Hours on top, minutes on the bottom.

7 – Minutes to seconds

Next, convert $5\text{ min}$ to seconds.

8 – Mixed length

Then, write $2\text{ m } 35\text{ cm}$ as centimeters.

9 – Fill the conversion table

Now, complete the table.

Kilograms	Grams
1	?
2	?
6	?
8	?

10 – Compare liquid volumes

Also, compare the two jars. Write <, >, or = in place of the question mark: $2\text{ L} \; ? \; 2{,}500\text{ mL}$

Jar A and Jar B drawn on the same scale.

Worksheet problems 11 and up

11 – Hours and minutes

First, write $3\text{ hr } 20\text{ min}$ as minutes.

12 – Pounds and ounces

Next, write $4\text{ lb } 6\text{ oz}$ as ounces.

13 – Minutes and seconds

Then, write $2\text{ min } 15\text{ sec}$ as seconds.

14 – Which is longer?

Now, which is longer, $3\text{ m } 5\text{ cm}$ or $350\text{ cm}$?

15 – Trail walk

Ethan’s hiking trail is $3\text{ km } 250\text{ m}$ long. He has walked $1{,}800\text{ m}$. How many meters are left?

The whole trail is 3,250 m.

16 – Milk bottle

Sofia has a $2\text{ L}$ bottle of milk. She pours $750\text{ mL}$ into pancake batter and $450\text{ mL}$ into a smoothie. How many milliliters are left?

17 – Movie time

Priya’s movie starts at the time on the clock (PM) and lasts $2\text{ hr } 50\text{ min}$. What time does it end?

The clock shows 3:15.

18 – Backpack weight

Diego’s backpack weighs $3\text{ lb } 9\text{ oz}$. He adds a lunch that weighs $12\text{ oz}$. Find the total weight in ounces. Then write it in pounds and ounces.

19 – Ribbon cost

Ribbon costs $6 per meter. Noah buys $250\text{ cm}$ of ribbon. How much does he pay?

Worksheet problem 20 and after

20 – Cookie baking

Jamal bakes cookies for $1\text{ hr } 45\text{ min}$, lets them cool for $25\text{ min}$, and decorates for $50\text{ min}$. He starts at 9:30 AM. How many minutes does everything take, and what time does he finish?

Key facts behind this 4th grade measurement conversions worksheet

Key facts

1 km = 1,000 m and 1 m = 100 cm.
1 kg = 1,000 g and 1 L = 1,000 mL.
1 lb = 16 oz, 1 hr = 60 min, and 1 min = 60 sec.
Larger unit to smaller unit: multiply, and the number gets bigger.
Change both amounts to the same unit before you add or subtract.

Common mistakes with this 4th grade measurement conversions worksheet

Students compare two measurements without converting. Change both to the same unit first, then compare, such as liters and milliliters.
Students decide a number is longer because it is bigger. A measure in centimeters can look larger than the same length in meters, so convert first.
Students forget to change centimeters to meters before using a price per meter. Convert the length first, then multiply.
Students add all the times but never find the end time. Add the amounts in minutes, then change back to hours and minutes.

Tips before you start the worksheet problems

Use a double number line for any time problem. Matching 1 hour to 60 minutes shows how the multiplication works.
Write the unit next to every number in your work. Seeing km, m, and cm side by side prevents mixing up units.
Teachers can ask students to pick the easiest unit for each word problem and explain their choice. Repeat this habit on every problem for the best results.

Download the 4th grade measurement conversions worksheet as a PDF with the button below and keep it with your notes.

4th grade measurement conversions worksheet: frequently asked questions

How do you compare a measurement in liters with one in milliliters?

Write both in the same unit. Two liters is 2,000 milliliters, so it is less than 2,400 milliliters. Converting to the smaller unit keeps whole numbers and makes comparing easy. A quick check like this takes only a few seconds and prevents most errors.

How do you write pounds and ounces in ounces only?

Change the pounds to ounces by multiplying by 16, then add the extra ounces. For 3 pounds 4 ounces, 3 times 16 is 48, and adding 4 gives 52 ounces. Always convert the larger unit first.

How do you find the end time when you know the start time and the length?

Add the hours and minutes separately, then adjust if minutes pass 60. A show that starts at 5:30 PM and lasts 1 hour 45 minutes ends at 7:15 PM. Add 1 hour to get 6:30, then 45 minutes to reach 7:15.

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