Centimeters to Inches Converter
1 cm = 0.394 in (exactly 1 / 2.54). Furniture listings, screen diagonals, and sewing patterns mix metric and imperial constantly; divide any centimeter value by 2.54 to get inches, or use the converter above.
Last updated: May 2026
Divide your centimeter figure by 2.54 and the inch result lands here.
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Measurement Scale Context
Current measurement: 1 cm-Fingernail width
Converting centimetres to inches
Airline baggage rules are a common trigger for this exact math: a carry-on limit listed as "56 x 36 x 23 cm" means nothing to someone used to thinking in inches, and getting it wrong at the gate is expensive. The fix is the same division every time, centimeters divided by 2.54, whether you're checking luggage dimensions, a parcel size limit, or a spec sheet from a supplier that only lists metric. Type any figure into the "From" field above and the inch value appears immediately, decimals included. The preset buttons cover common sizes, and swap (↔) flips the converter to go from inches back to centimeters.
Centimeter to inch reference: everyday objects
| Centimeters | Inches | Typical use |
|---|---|---|
| 1 cm | 0.394 in | Fingernail width; USB-A port height is 0.65 cm |
| 5 cm | 1.969 in | Typical smartphone thickness is 0.7-0.9 cm; hand span ~20 cm |
| 10 cm | 3.937 in | Coffee mug diameter; width of a large smartphone screen |
| 25 cm | 9.843 in | A4 paper is 21 cm wide; standard ruler length is 30 cm |
| 50 cm | 19.685 in | Standard shelf depth; width of a single-door cabinet |
| 80 cm | 31.496 in | Standard interior door width (EU 78-90 cm range) |
| 100 cm | 39.370 in | One metre; standard kitchen worktop depth is 60 cm |
Why the two systems keep colliding
Centimeters belong to the metric system used almost everywhere outside the USA; inches belong to the imperial system that US retailers, manufacturers, and hardware stores still default to. Neither side is going to switch, so the conversion factor is worth knowing cold: 1 inch equals exactly 2.54 centimeters, so 1 centimeter equals approximately 0.3937 inches. That single number is behind every mismatched product listing, every import spec sheet in the wrong unit, and every sewing pattern printed for a market that doesn't use your ruler. A quick conversion here is what stops you from ordering a part, a shelf, or a monitor that doesn't fit.
As a mental anchor beyond the reference table above: 1 cm (0.3937 in) is about a fingernail's width, 5 cm (1.97 in) is close to a finger's width, 10 cm (3.94 in) matches a pencil length or small hand span, 25 cm (9.84 in) is roughly a notebook or tablet width, 50 cm (19.69 in) is a common shelf width, and 100 cm (39.37 in) is one meter, close to a typical door or counter height reference.
Frequently Asked Questions
What is 5 feet in centimeters?
5 feet = 60 inches = 152.4 cm. 6 feet = 72 inches = 182.88 cm. Height conversions come up often when reading international product specs or comparing clothing sizes from US brands. Use the swap button to convert cm back to inches.
Screen sizes are in inches, how do I compare with cm measurements?
Monitor and TV screens are measured diagonally in inches worldwide, even on European websites. A 27-inch monitor is 68.6 cm diagonally. When buying online, check the product page for physical dimensions (width × height), which may be listed in cm or mm separately from the diagonal inch size.
My sewing pattern is in cm but my ruler shows inches, what should I do?
Convert the key measurements once, write them down, then work entirely in one unit system for the rest of the pattern. Switching back and forth mid-project causes rounding errors that compound over many seams. For most clothing patterns, 0.5 cm (about 3/16") precision is sufficient.
Is 30 cm the same as 1 foot?
Close but not exact. 30 cm = 11.81 inches, while 1 foot = 30.48 cm. The 4.8 mm difference is negligible for rough checks but matters when cutting wood, fabric, or metal. For precise work, always use the exact value from this converter.
When should I use mm instead of cm for precision work?
Use millimeters when precision below 1 cm matters, for example, 3D printing tolerances, drill bit sizing, watch parts, or jewelry. At those scales, "5.3 cm" is ambiguous but "53 mm" is unambiguous. Use the mm-to-inch converter for those measurements.
Why do European furniture sizes differ from US sizes, even when both claim the same measurement?
European and US standards sometimes differ slightly due to manufacturing tolerances and historical practices. A European 90 cm wardrobe might have different actual depth than a US 36" cabinet, even though 90 cm ≈ 35.4". Always verify actual vs. nominal dimensions. When ordering internationally, confirm the exact physical dimensions in both systems before purchasing to ensure it fits your space.
How do I convert fractional inches (like 5 1/8") to metric?
Convert the whole number and fractional parts separately. For example, 5 1/8" = 5" + 1/8" = 12.7 cm + 0.32 cm ≈ 13 cm. Alternatively, use this converter: 5.125 inches = 13.0175 cm. For precision work (furniture, woodworking), convert once and use the metric measurement consistently to avoid rounding errors in your project.