Focused length conversion studio
Inches to CM Converter
Convert decimal or fractional inches to centimetres with the exact 2.54 factor. View feet plus inches, a dual-unit scale, common values and batch results.
Exact constants · fractions · batch conversion · visual scaleInches → Centimetres
One international inch equals exactly 2.54 centimetres. Multiply inches by 2.54 to obtain centimetres without an approximate conversion factor.
Live length result
Converted measurement
Live conversion ruler
Both rows represent the same physical length. Their labels show why the numeric values change when the unit changes.
—The same length in every unit
Common values
Choose a familiar starting value or enter your own measurement above.
Conversion table
The table updates around useful values for this conversion.
| Starting value (in) | Converted value (cm) |
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Convert several values at once
Enter values separated by commas, semicolons, spaces or new lines. Up to 50 values are processed at once.
| Starting value (in) | Converted value (cm) |
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Exact conversion standard
One international inch equals exactly 2.54 centimetres. Multiply inches by 2.54 to obtain centimetres without an approximate conversion factor.
Where this conversion is useful
Inch-to-centimetre conversion is useful for screen sizes, tools, pipes, product dimensions, sewing, woodworking and specifications that must be understood in metric countries.
Decimal and fractional inches
Decimal inches are best for calculations, while rulers, woodworking and construction often use fractions. The calculator shows the nearest common fraction without changing the high-precision decimal result.
Precision and rounding
The calculator retains full floating-point precision during calculations. Choose more displayed decimal places for technical work and fewer for everyday measurements. Do not imply more accuracy than the original measurement provides.
Zero is a valid length and converts to zero in every unit.
Batch conversion for lists and specifications
Paste a short list of dimensions to create a clean two-column result table. This is useful for product specifications, plans, training logs and travel notes.
Quick length conversions
Continue with the reverse direction, another common unit pair or the full Length Converter.
Inches to CM Converter – Frequently asked questions
How do I convert inches to centimetres?
Multiply the inch value by 2.54. For example, 12 inches multiplied by 2.54 equals exactly 30.48 centimetres.
How many centimetres are in one inch?
One international inch equals exactly 2.54 centimetres.
Can I enter a fractional inch measurement?
Yes. You can enter decimals in the main field and use the fraction result and rounding controls to compare common ruler fractions.
How many centimetres are in 12 inches?
Twelve inches equals exactly 30.48 centimetres.
Can I convert several inch values together?
Yes. Enter up to 50 values in the batch converter to create an inch-to-centimetre table.
Why are screen sizes measured in inches?
Display sizes are conventionally stated as a diagonal in inches, even in many countries that otherwise use metric units.
Can I use a comma as the decimal separator?
Yes. The converter accepts either a comma or a period as the decimal separator.
Where can I convert feet, metres or miles?
Use the related quick converters or the full Length Converter for a broader unit list.