Cm to Inches Cheat Sheet for Furniture, Screens, and Frames

1 cm equals 0.3937 inches, and 1 inch equals 2.54 cm. To convert centimeters to inches, multiply by 0.3937 or divide by 2.54. That single formula covers every situation on this page, from measuring a sofa to buying a TV to ordering a picture frame. The cheat sheets below save you from doing the math by hand for the most common sizes you will actually encounter.

The centimeter and inch are both units of length, but they belong to different measurement systems. Centimeters are part of the metric system used by most of the world. Inches are part of the imperial system still standard in the United States and common in the United Kingdom, Canada, and Australia for some products. Furniture bought in Europe, TV sizes listed on a European website, and photo labs in different countries all mix the two systems, making a quick reference like this one genuinely useful. If you need to convert your own height from centimeters to feet, see our guide at what is 170 cm in feet.

Master cm to inches table (1 to 100 cm)

The table below covers centimeter values in practical steps from 1 to 100 cm. For values not listed, multiply by 0.3937 or use the converter further down the page.

Furniture and room measurements

European furniture catalogs and flat-pack assembly guides almost always list dimensions in centimeters. If you are comparing a piece against a room measured in feet and inches, the table below converts the most common furniture dimensions directly.

When fitting furniture through a doorway, remember to check both the width of the piece and whether it can be tilted or disassembled. A sofa listed as 200 cm wide is 78.7 inches, which is wider than a standard 30-inch door and must be brought in at an angle or through a wider opening.

TV and monitor screen sizes

Screen sizes are always measured diagonally. Manufacturers in the US and UK advertise in inches; European and some Asian markets use centimeters for the same product. The table below lists the most common diagonal sizes in both units.

A 55-inch TV is the most popular size globally and measures 140 cm diagonally. Note that the advertised diagonal is the screen only. The overall frame (bezel) adds several centimeters to the physical width and height, so always check the product dimensions in the spec sheet before deciding whether a TV will fit in a particular space or cabinet.

Picture frame and photo print sizes

Photo labs and frame shops switch between inches and centimeters depending on where they are based. If you are ordering prints or frames from an overseas retailer, you may need to match one unit to the other.

Paper sizes in cm and inches

The ISO A-series paper standard is used across most of the world, while the United States uses Letter and Legal. A4 is the global workhorse for office documents and is close to, but not the same as, US Letter size.

A4 and US Letter are close enough in width (21.0 cm vs 21.6 cm) that most content fits either, but A4 is taller (29.7 cm vs 27.9 cm for Letter). If you set margins based on one size and print on the other, expect a small reflow. Always check the paper size setting in your print dialog when mixing international documents.

How the cm to inches conversion works

The inch is defined as exactly 2.54 centimeters. That single fixed relationship produces every number in the tables above. To convert centimeters to inches, divide by 2.54. To convert inches to centimeters, multiply by 2.54. The equivalent multiplier going from cm to inches is 1 divided by 2.54, which equals 0.393701, so multiplying cm by 0.3937 gives the same result as dividing by 2.54.

For everyday mental math, dividing by 2.5 instead of 2.54 gives a close enough estimate. The error is less than 2 percent, which is fine for checking whether a piece of furniture will fit through a door or whether a photo frame is roughly the right size. For precise work, such as cutting material or ordering a custom frame, use the exact figure or the converter above.

If you are converting your own height from centimeters to feet and inches, the process adds one more step. Divide cm by 2.54 to get total inches, then divide by 12 to find how many whole feet, and take the remainder as the inches leftover. For a full height conversion table and common examples, see our guide on what is 170 cm in feet.

Quick reference: common conversions to remember

A few landmark values make it easier to estimate cm-to-inch conversions on the fly without a table:

• 1 inch = 2.54 cm (the base definition)
• 10 cm is just under 4 inches (3.94 in)
• 30 cm is just under 12 inches (one foot)
• 100 cm (one meter) is just over 39 inches (39.37 in)
• A 55-inch TV diagonal is 140 cm
• A 4 x 6 inch photo is 10 x 15 cm
• A4 paper is 21 x 29.7 cm (about 8.3 x 11.7 in)

These anchor points cover the most frequent conversions for home, office, and shopping situations. Once you know that 30 cm is nearly 12 inches, you can estimate larger values quickly: 60 cm is about 24 inches, 90 cm is about 35 inches, and so on.