Convert Inches to Centimetres Instantly – Free Online Tool
Convert inches to centimetres instantly with our free online tool. Perfect for DIY projects, buying imported tech, or sorting measurements for your home.
Metric Length Converter - cm, m, km & MilesInches
Centimeters
in to cm Conversion Formula
To convert inches to centimetres, multiply the inch value by 2.54. Since 1959, one inch has been internationally defined as exactly 2.54 centimetres.
Inches to Centimetres Conversion Table
| Inches (in) | Centimeters (cm) |
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Related Length Conversions
How to Use
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1
Enter Your Inch Value
Type the measurement in inches — for example, enter 65 for a 65-inch TV screen size.
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2
See the cm Equivalent
The result appears instantly: 65 in = 165.1 cm — great for checking if it fits your lounge wall.
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3
Copy or Reverse
Copy the result to your clipboard or click Swap to convert centimetres back to inches.
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4
Use the Reference Table
Check the table for common values like 12 in = 30.48 cm or 24 in = 60.96 cm.
Why Use Be Converter?
Instant Calculation
Get precise results in real-time as you type — no waiting around, whether you're in the office or the shed.
Precise Accuracy
Uses the exact factor of 2.54 cm per inch, ensuring your measurements are spot on for any job.
Handy Reference Table
Common conversions at a glance — from 1/4 inch to 36 inches — perfect for quick checks.
Swap with One Click
Toggle between inches and centimetres instantly — essential when working with mixed-unit plans or sizing.
Free & No Signup
No registration required. Convert as many measurements as you need for work or personal projects.
Fully Private
All calculations happen locally in your browser. No data is sent to any server.
Frequently Asked Questions
How many centimetres are in 1 inch?
How do I convert inches to cm manually?
What is 6 inches in centimetres?
Why is the inch defined as 2.54 cm exactly?
How do I convert fractional inches to centimetres?
About Inches to Centimetres Converter
Our free online inches to centimetres converter provides instant, accurate length conversions for any application. Whether you're shopping for electronics with screen sizes listed in inches, ordering timber or hardware from international suppliers, renovating your home, or working on DIY projects in the shed, this tool delivers precise results. The inch is primarily used in the US and UK, while centimetres are standard in Australia, making this conversion essential for getting your measurements right.
Expert Tips for in to cm Conversion
Since 1959, 1 inch has been defined as exactly 2.54 centimetres by international agreement among nations including Australia, the UK, and the US.
For a quick mental estimate, multiply inches by 2.5. For example, 8 inches is roughly 20 cm (actual: 20.32 cm). Accurate enough for a quick check.
Screen sizes are always measured diagonally in inches worldwide. A 65-inch TV, common in Australian living rooms, has a 165.1 cm diagonal.
In construction and DIY, imported lumber dimensions in inches convert to metric: a standard 4-inch wide board is roughly 10 cm wide.
For travel and luggage, knowing suitcase dimensions in cm is helpful. A 24-inch suitcase is approximately 61 cm, fitting most airline check-in limits.