Two-way conversion
Convert inches to centimeters or centimeters to inches.
Inches to Centimeters Converter
Convert inches to centimeters and centimeters to inches in seconds. Try whole, decimal or common fractional values such as 1/2, 3/4, 1, 10 or 12 inches.
Decimal result
Get precise values for measurement, design and construction.
Inch fractions
Round the result to 1/8, 1/16, 1/32 or 1/64.
Free online tool
Inches ↔ Centimeters Converter
Convert inches to centimeters or cm to inches with precise results and fractional equivalents.
The fraction is rounded to the selected denominator.
Examples: 1/2 in = 1.27 cm · 3/4 in = 1.905 cm · 10 in = 25.4 cm · 12 in = 30.48 cm
Common conversions
| in | cm |
|---|---|
| 0.5 | 1.27 |
| 0.75 | 1.905 |
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 6 | 15.24 |
| 10 | 25.4 |
| 12 | 30.48 |
| 24 | 60.96 |
The conversion uses the exact equivalence of 1 inch = 2.54 centimeters. Inch fractions are shown as approximations using the selected denominator.
How to convert inches to cm and cm to inches
The inch is a unit of length from the imperial system. The centimeter belongs to the metric system.
The relationship between both units is defined exactly: one inch is equal to 2.54 centimeters.
The same factor can therefore be used for precise conversions in both directions.
Inches to centimeters
cm = inches × 2.54
Centimeters to inches
inches = cm ÷ 2.54
Converting 3 1/2 inches
Original measurement
Fraction3 1/2"
Decimal value3.5 inches
Factor2.54
Result
The conversion is:
3.5 × 2.54
The result is:
8.89 cm
Therefore, 3 1/2 inches are exactly equal to 8.89 centimeters.
Decimal and fractional inches
Inches can be written as decimal values, such as 1.5 inches, or as fractions, such as 1 1/2 inches.
Both expressions represent the same measurement. The converter displays an approximate fraction for easier use with imperial rulers and tape measures.
Screws, pipes and tools
Many industrial products use inch dimensions even when the overall project uses metric measurements.
Common examples include pipe diameters, fittings, bolts, screws, drill bits and tools.
Choosing the denominator
A smaller denominator gives a simpler approximation, while a larger denominator represents the value with greater detail.
A denominator of 1/16 is often useful for general work. Values of 1/32 or 1/64 may be appropriate for more precise measurements.
Approximate fractions
A rounded fraction may differ slightly from the original decimal measurement.
For fabrication, machining or high-precision work, use the exact decimal value and verify product tolerances.
Metric and imperial measurements in Panama
Equipment, materials and fittings used in Panama may include dimensions expressed in inches.
Conversion makes it easier to compare those measurements with drawings and specifications expressed in centimeters or millimeters.
Visit MG Architecture & EngineeringInch and centimeter questions
How many centimeters are in one inch?
One inch is exactly equal to 2.54 centimeters.
How do I convert inches to centimeters?
Multiply the inch value by 2.54.
How do I convert centimeters to inches?
Divide the centimeter value by 2.54.
How many inches are 10 centimeters?
Ten centimeters are approximately equal to 3.937 inches.
How many centimeters are in 1/2 inch?
One-half inch is exactly equal to 1.27 centimeters.
How many centimeters are in 3/4 inch?
Three-quarters of an inch are exactly equal to 1.905 centimeters.
How many centimeters are 10 inches?
Ten inches are exactly equal to 25.4 centimeters.
How many centimeters are 12 inches?
Twelve inches are exactly equal to 30.48 centimeters.
How do I convert decimal inches to fractions?
Separate the whole-number portion and round the decimal portion to the selected denominator, such as 1/8, 1/16, 1/32 or 1/64.
Are inch fractions exact?
They are approximations to the selected denominator. A denominator of 1/32 or 1/64 provides greater precision than 1/8.
What does a measurement such as 2 1/2 inches mean?
It means two whole inches plus one-half inch. It is equal to 2.5 inches or 6.35 centimeters.
Why are inches used in construction?
They are commonly used for pipe sizes, tools, screws, profiles, screens, fittings and products manufactured with imperial dimensions.
Can I enter decimal values with a comma?
Yes. The converter can interpret decimal values entered with either a comma or a period.