The worksheet generator on this page produces metric conversion worksheets with real, freshly randomised numbers — 20 of them per sheet by default — plus the answer key a parent or teacher needs to mark it quickly. A typical problem from the sheet in front of you is 70 cm = □ mm, which works out to 700; another is 2.6 km = □ m, giving 2,600.
‘New set of problems’ opens the generator in its own tab. There you can change the problem count and turn the answer key on or off. ‘Print or save as PDF’ opens the print dialog — choose Save as PDF in the printer list to keep the file. The sheet fits US Letter and A4, and the answer key prints on its own page.
Because each sheet is new, the child cannot rely on remembering a particular converted value.
Metric conversions are all powers of ten, which makes them a decimal place-value exercise as much as a measurement one.
Customary conversions have to be learned as facts, twelve inches to a foot and three feet to a yard, because a problem like 2.6 km = □ m offers no pattern to fall back on.
Converting between units is multiplication or division by a conversion factor, and the only real decision is which way round. A conversion such as 70 cm = □ mm gives 700 because the new unit is smaller, so there must be more of them.
In US classrooms these metric conversion worksheets are commonly aligned with the measurement and data strand for this grade, though the exact wording varies from state to state.
| # | Problem | Answer | What to check |
|---|---|---|---|
| 1 | 70 cm = □ mm | 700 | Watch for: losing a factor of ten in metric work |
| 2 | 2.6 km = □ m | 2,600 | Check: converting in two steps and rounding in the middle |
| 3 | 0.7 km = □ m | 700 | Look at: multiplying when division was needed |
| 4 | 90 m = □ cm | 9,000 | Ask about: dropping the unit from the answer |
| 5 | 71 m = □ cm | 7,100 | Watch for: using the wrong conversion factor |
| 6 | 33 cm = □ mm | 330 | Check: assuming metric and customary units interchange neatly |
Take the first problem on the sheet as it stands, 70 cm = □ mm. Work 70 cm = □ mm out on paper rather than in your head the first few times, say each step aloud, and check the result against 700 on the key before moving on.
Work 90 m = □ cm out loud as a demonstration. It gives 9,000. Children who hear 90 m = □ cm reasoned through once at the start of a session make noticeably fewer errors in the ten minutes that follow.
The key prints on its own page by default. Uncheck the answer-key box before printing if you would rather keep it back and mark the sheet yourself.
Because the numbers are random, there is no shared answer list to look up: the key printed behind your sheet is the only one that fits it, and it shows 700 for 70 cm = □ mm.
The sheet is laid out to fit one page on both US Letter and A4. Leave the browser scaling at 100% and turn headers and footers off, and the 20 problems land inside the margins on either paper size.
Portrait orientation is what the sheet is designed for. Landscape works but wastes about a third of the paper, so leave the orientation alone unless you have a reason.
One sheet of metric conversion worksheets a day for two weeks will tell you more about where a child working at this level actually stands than any single long assessment.
→ Free Measurement Conversion Worksheets
Free printable math worksheets from a working math academy director in Korea. Problems come from our own code, not from a published workbook. Every sheet prints on US Letter or A4 with its answer key. All worksheets · Worksheet generator · Korean site
Last updated: 2026-09-13