How do I convert centimetres to inches?

Divide centimetres by 2.54 to get inches. 30 cm ÷ 2.54 ≈ 11.81 in.

How do I convert inches back to centimetres?

Use the swap button, or apply the reverse factor: in × 2.54 = cm.

Yes. 1 inch is defined as exactly 2.54 cm.

Convert centimetres to inches instantly, with a table of common lengths and heights.

In short

Divide centimetres by 2.54 to get inches. For example, 30 cm ÷ 2.54 ≈ 11.81 in.

How do I convert centimetres to inches?: Divide centimetres by 2.54 to get inches. 30 cm ÷ 2.54 ≈ 11.81 in.
How do I convert inches back to centimetres?: Use the swap button, or apply the reverse factor: in × 2.54 = cm.
Is the conversion exact?: Yes. 1 inch is defined as exactly 2.54 cm.