Centimeter to Inch Converter
Converting between centimetres and inches is something most of us need at some point. Whether you’re measuring furniture, checking parcel dimensions, or following a DIY guide from abroad, this converter helps you switch between metric and imperial in seconds.
Quick Conversions
Result
Recent Conversions
Centimetre to Inch Conversion Table
Here are the most common conversions you’ll need in everyday life. From measuring screen sizes to checking clothing dimensions, these values come in handy.
| Centimetres (cm) | Inches (decimal) | Inches (fraction) |
|---|---|---|
| 1 cm | 0.39 in | ⅜ in |
| 2.54 cm | 1.00 in | 1 in |
| 5 cm | 1.97 in | 1 ⁶³⁄₆₄ in |
| 10 cm | 3.94 in | 3 ¹⁵⁄₁₆ in |
| 15 cm | 5.91 in | 5 ⅞ in |
| 20 cm | 7.87 in | 7 ⅞ in |
| 25 cm | 9.84 in | 9 ¹³⁄₁₆ in |
| 30 cm | 11.81 in | 11 ¹³⁄₁₆ in |
| 40 cm | 15.75 in | 15 ¾ in |
| 50 cm | 19.69 in | 19 ¹¹⁄₁₆ in |
| 75 cm | 29.53 in | 29 ½ in |
| 100 cm | 39.37 in | 39 ⅜ in |
| 150 cm | 59.06 in | 59 ¹⁄₁₆ in |
| 180 cm | 70.87 in | 70 ⅞ in |
| 200 cm | 78.74 in | 78 ¾ in |
How the Conversion Works
The relationship between centimetres and inches is straightforward once you know the magic number: 2.54. One inch equals exactly 2.54 centimetres, which makes converting between them a simple division.
The Formula
Or if you prefer multiplication:
Step-by-Step Conversion
Visual Comparison
Here’s how they stack up against each other:
Why Two Systems?
The UK sits in an interesting spot when it comes to measurements. Officially, we’ve been metric since the 1960s, but imperial units never quite went away. You’ll find metres on building plans but feet and inches in estate agent listings. Road signs show miles, yet petrol comes in litres.
This mix means most Brits need to switch between systems regularly. Centimetres dominate in schools, hospitals, and most workplaces. But inches still crop up when measuring TV screens, describing someone’s height in casual chat, or following older DIY instructions.
Everyday Examples
These conversions pop up more often than you’d think:
- Screen sizes: A 15.6-inch laptop screen is about 40 cm across
- Photo printing: A standard 6×4 inch photo is roughly 15×10 cm
- Furniture: That 180 cm wardrobe? It’s about 71 inches tall
- Clothing: A 32-inch waist translates to roughly 81 cm
- Baking: A 9-inch cake tin is approximately 23 cm
Related Length Conversions
Once you’re comfortable with centimetres and inches, these related conversions become easier to grasp.
| From | To | Multiply by |
|---|---|---|
| Centimetres | Millimetres | 10 |
| Centimetres | Metres | 0.01 |
| Inches | Feet | 0.0833 |
| Inches | Yards | 0.0278 |
| Metres | Feet | 3.281 |
| Kilometres | Miles | 0.621 |
FAQs
One inch equals exactly 2.54 centimetres. This has been the official conversion since 1959, when the inch was formally defined in metric terms.
In 1959, English-speaking countries agreed to define the inch as precisely 25.4 millimetres (or 2.54 centimetres). Before that, different countries had slightly different inch measurements. This standardisation made international trade and engineering much simpler.
It depends what you’re doing. For DIY or rough measurements, rounding to one decimal place (like 3.9 inches) works fine. For precise engineering or manufacturing, you’ll want to keep more decimal places. The fraction option in this converter helps when you’re working with traditional measuring tapes.
Metric is generally simpler for maths because everything moves in tens. Ten millimetres make a centimetre, 100 centimetres make a metre. Imperial uses 12 inches to a foot, three feet to a yard, which involves more mental arithmetic. That said, if you grew up with one system, it’ll feel natural regardless.
First, convert the fraction to a decimal. For example, ½ inch becomes 0.5 inches. Then multiply by 2.54. So ½ inch × 2.54 = 1.27 cm. Quarter inches? 0.25 × 2.54 = 0.635 cm.
Yes. “cm” is simply the abbreviation for centimetres (or centimeters in American spelling). Both mean 1/100th of a metre.
Tradition, mainly. The UK officially adopted the metric system in 1965, but imperial measurements remained legal for certain uses. Road signs still show miles because changing them all would cost millions. Height and weight in casual conversation stick to feet/inches and stones because that’s what older generations taught younger ones. It’s a quirk of British culture at this point.
Absolutely. If you’re 175 cm tall, that’s 68.9 inches, which is about 5 feet 9 inches (since there are 12 inches in a foot). Medical records in the UK use centimetres, but people still talk about height in feet and inches socially.