Ruler — Object Measuring 17 cm — free printable diagram

How long is 17 cm?

The object in this illustration measures 17 centimetres. It starts at the 0 mark on the ruler and ends at 17, so its length is 17 cm — which is the same as 170 millimetres, or about 6.69 in.

Centimetres

17 cm

Millimetres

170 mm

Metres

0.17 m

Inches

≈6.69 in

• Measure from the 0 mark, not from the end of the ruler. Most rulers have a small margin before the scale begins, and starting there is the commonest source of a wrong answer.
• Each numbered mark is 1 centimetre and each small mark between them is 1 millimetre, so 10 mm = 1 cm and 17 cm = 170 mm.
• To convert centimetres to millimetres, multiply by 10: 17 × 10 = 170 mm. To go the other way, divide by 10.
• To convert centimetres to metres, divide by 100: 17 ÷ 100 = 0.17 m.
• One inch is exactly 2.54 cm, so 17 cm ÷ 2.54 is about 6.69 in.