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CM to Inches Converter

Convert centimeters to inches in real time — type into either box and the other updates instantly. Useful for furniture dimensions, door widths, and fine-grained layout details.

1 cm = 0.3937 in

cm to in common values

A quick-reference table for the conversions that come up most often when sketching a floor plan.

cmin
1 cm0.3937 in
5 cm1.9685 in
10 cm3.937 in
25 cm9.8425 in
50 cm19.685 in
100 cm39.3701 in
150 cm59.0551 in
200 cm78.7402 in
250 cm98.4252 in
300 cm118.1102 in

How the cm to inches conversion works

One centimeter equals 0.393701 inches, since an inch is defined as exactly 2.54 centimeters. To convert centimeters to inches, divide by 2.54 (or multiply by 0.393701). To convert inches back to centimeters, multiply by 2.54. The calculator above handles both directions as you type.

Where this comes up in floor planning

Small-scale measurements — door and window widths, trim and molding thickness, appliance and fixture dimensions, furniture depth — are usually easier to reason about in inches, even inside a metric floor plan. Product spec sheets for imported fixtures and fittings are frequently listed in centimeters, so converting to inches lets you cross-check clearances (like a doorway opening or a hallway width) against inch-based building conventions.

Precision tips for small measurements

Because inches are a smaller relative unit than feet, rounding errors matter more at this scale — a difference of a few millimeters can shift a fixture clearance from fitting to not fitting. For anything load-bearing or safety related (like a stair tread or a doorway width), round to the nearest 1/16 inch rather than truncating decimals.

CM to Inches Converter FAQ

1 centimeter equals 0.393701 inches.

Divide the number of centimeters by 2.54. For example, 50 cm ÷ 2.54 = 19.685 in.

1 inch equals exactly 2.54 centimeters.

Many furniture and fixture catalogs list dimensions in centimeters even when the target market builds in inches. Converting lets you check clearances, doorway widths, and appliance fit against an imperial-unit floor plan.

Yes — both fields display results rounded to four decimal places, and you can type decimal values into either box for a live two-way conversion.

30 cm is 11.811 inches — just short of a foot, which is 30.48 cm.

Multiply the decimal part of the inches by 16 and round to get sixteenths. For example, 50 cm is 19.685 in, and 0.685 × 16 ≈ 11, so mark it at 19 11/16 in.

Ready to put these numbers into a floor plan?

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