Centimeters to Inches Converter
Convert centimeters to inches instantly. Type a cm value and see the result in inches. Formula: 1 cm = 0.393701 inches.
Centimeters and inches are the two most common units for expressing human body measurements, clothing sizes, and small-scale dimensions. The conversion factor is defined exactly: 1 inch = 2.54 centimeters, making 1 cm = 0.393700787 inches. The most widespread use case is height conversion. In the US, height is expressed in feet and inches — 5'10" is how an American states what everyone else calls 177.8 cm. Conversely, when Americans interact with height in metric contexts (European passport applications, medical forms in international clinics), they need to convert. The formula: divide cm by 2.54 to get inches, then divide by 12 for the feet portion. For clothing and fashion, European sizing is centimeter-based while American sizing uses inches. A 32-inch waist is 81.3 cm; a 91 cm chest is 35.8 inches. Screen sizes present a paradox: global screen dimensions are stated in inches (a 15-inch laptop, a 65-inch TV) even in metric countries, because the convention originated in the US and was never metrified. In construction and carpentry, architectural drawings in Europe use millimeters and meters, while American plans use feet and inches. A doorway specified at 80 cm needs to be rendered as 31.5 inches for an American reader.
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Free Online Unit Converter
Zolkit's unit converter supports 7 categories covering dozens of the most common conversions — length, weight, temperature, volume, area, speed, and torque. Pick a category, select your units from the dropdowns, type a value, and see the result instantly. A swap button reverses the conversion direction with one click. Your last-used category and units are remembered locally so the converter is ready when you return.
7 Unit Categories
Convert length, weight, temperature, volume, area, speed, and torque — all the unit conversions you need in one tool.
Instant Conversion
Results update as you type. Switch between units with dropdowns and see the converted value immediately.
Swap Units
Hit the swap button to instantly reverse the conversion direction. Saves time when you need both directions.
Offline-Ready
All conversions are calculated locally in your browser. No internet required after the page loads.
Works on Any Device
Clean, responsive layout that works on phones, tablets, and desktops alike.
Always Free
No account required, no ads, no limits. Convert as many units as you need, whenever you need.
How to Use the Unit Converter
- 1
Choose a unit category from the tab bar at the top: Length, Weight, Temperature, Volume, Area, Speed, or Other.
- 2
Select the unit you're converting from and the unit you're converting to using the dropdowns. Type your value and the result appears instantly.
- 3
Click the swap button (↔) to reverse the conversion direction, or click Copy to save the result to your clipboard.
Frequently Asked Questions
How many inches is 1 centimeter?
1 centimeter equals 0.393701 inches, or approximately 0.394 inches. Since 1 inch = 2.54 cm exactly, 1 cm = 1/2.54 = 0.3937 inches.
What is 170 cm in feet and inches?
170 cm equals 5 feet 6.93 inches (170 ÷ 2.54 = 66.93 inches = 5 ft 6.93 in). This is approximately 5'7".
Why are screen sizes measured in inches even in metric countries?
Screen sizes in inches are a US-originated convention that became a global standard in the technology industry. Even countries that officially use metric measurements state TV and monitor sizes in inches because of this entrenched industry norm.
How do I convert cm to inches mentally?
Multiply cm by 0.4 for a quick estimate (slightly higher than the true 0.394). For example, 50 cm × 0.4 = 20 inches (actual: 19.69). For greater precision, divide by 2.54.