Skip to content
MathAnvil
§ Measurement·Grades 4–5

Basic Conversions Worksheets

Free PDF · Problems + answer key · Instant download

Easy

10 problems

Medium

20 problems

Hard

20 problems

Mixed

30 problems

Free printable basic conversions worksheets with step-by-step answer keys. Every worksheet is uniquely generated so students never see the same problems twice. Topics covered range from recall metric conversion factor at the easy level through to convert a decimal value between units at the advanced level.

CCSS.4.MDCCSS.5.MDKP.MAT.5

What is basic conversions?

Basic conversions transform measurements from one unit to another while preserving the same quantity. The metric system uses powers of 10 (like 1 meter = 100 centimeters), while imperial units rely on memorized factors (such as 1 pound = 16 ounces). Converting requires either multiplying when moving to smaller units or dividing when moving to larger units.

Why it matters

Unit conversions appear constantly in cooking (converting 2 cups to 16 fluid ounces), construction (changing 144 inches to 12 feet), and medicine (calculating dosages from milligrams to grams). Students encounter conversions in CCSS.4.MD and CCSS.5.MD standards, building skills needed for chemistry, physics, and engineering. Professional fields require precise conversions — a pharmacist converting 2.5 grams to 2500 milligrams for accurate prescriptions, or an architect converting 8.5 feet to 102 inches for blueprints. Online shopping often requires converting between metric and imperial measurements, like understanding that 5 kilometers equals approximately 3.1 miles for running distances. These skills prepare students for advanced mathematics involving rates, proportions, and scientific notation.

Common mistakes to watch for

  • ✗Multiplying when converting from smaller to larger units, such as calculating 5000 grams ÷ 1000 = 5000 kilograms instead of 5000 ÷ 1000 = 5 kilograms.
  • ✗Using incorrect conversion factors, like treating 1 meter = 10 centimeters instead of 100 centimeters, leading to 3 meters = 30 centimeters rather than 300 centimeters.
  • ✗Forgetting to line up decimal places correctly when converting, such as writing 2.5 kilometers = 250 meters instead of 2500 meters.
  • ✗Confusing imperial conversions by mixing up factors, like using 1 pound = 12 ounces instead of 16 ounces, resulting in 4 pounds = 48 ounces rather than 64 ounces.

Questions teachers ask

When do I multiply versus divide in unit conversions?+
Multiply when converting to a smaller unit (meters to centimeters: 3 × 100 = 300). Divide when converting to a larger unit (grams to kilograms: 4000 ÷ 1000 = 4). Think of breaking things apart (multiply) versus grouping them together (divide).
What are the most important metric conversion factors to memorize?+
The essential factors are 1 kilometer = 1000 meters, 1 meter = 100 centimeters, 1 kilogram = 1000 grams, and 1 liter = 1000 milliliters. These cover distance, mass, and volume conversions needed for most elementary problems.
How do I check if my unit conversion is correct?+
Convert back to the original unit as verification. If 5 feet = 60 inches, then 60 ÷ 12 should equal 5 feet. The original quantity should match exactly when reversed, confirming the conversion accuracy.
Why are imperial conversions harder than metric conversions?+
Imperial uses irregular factors like 12 inches per foot and 16 ounces per pound, requiring memorization. Metric conversions consistently use powers of 10 (10, 100, 1000), making calculations more predictable and systematic.
What's the difference between converting whole numbers versus decimals?+
Whole number conversions follow standard multiplication or division (5 meters × 100 = 500 centimeters). Decimal conversions require careful placement of decimal points (2.5 kilometers × 1000 = 2500 meters, not 250 meters).
Generate worksheet →Free · No account · Unlimited

Pick a difficulty

Click any level to open the generator with that difficulty pre-selected.

Beginner

Generate →
Concepts
Recall metric conversion factor
Range
standard factors (10, 100, 1000)
Steps
1 step
Example
How many cm in 1 m?

Easy

Generate →
Concepts
Multiply to convert bigger unit to smaller
Range
2–10 whole units
Steps
1–2 steps
Example
Convert 5 km to m

Medium

Generate →
Concepts
Divide to convert smaller unit to bigger (may produce decimals)
Range
whole or half/quarter multiples
Steps
2–3 steps
Example
Convert 2500 g to kg

Hard

Generate →
Concepts
Convert a decimal value between units
Range
1.1–9.75, split into whole + decimal parts
Steps
3–4 steps
Example
Convert 3.75 m to cm

Try a sample problem

Try it right now

Click “Generate a problem” to see a fresh example of this technique.

Learn the theory → Read our basic conversions guide with worked examples.

Practice online → Interactive basic conversions problems with instant feedback.