This image shows a printable ruler designed to measure length in millimeters (mm).
Here is how to use it:
1.
Print the page: Make sure you print this on standard paper without shrinking or enlarging it (select "Actual Size" or "100%" in your printer settings). If you change the size, the measurements will be wrong.
2.
Cut it out: Cut along the rectangular outline. You can cut off the extra space at the bottom where the scissors icon is.
3.
Measure: Place the "0 mm" mark at the very start of the object you want to measure. Read the number on the ruler that lines up with the end of the object.
The ruler measures from
0 mm to 210 mm. Since 10 mm equals 1 cm, this ruler is also
21 cm long.
Final Answer:
A printable 210 mm (21 cm) ruler. Print at 100% scale, cut out, and use the 0 mark to start measuring objects in millimeters.
Parent Tip: Review the logic above to help your child master the concept of printable mm to inches ruler.
