Inch to Centimeter Converter
Length · unit-converter
Convert Inch to Centimeter with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use SI-based definitions (international yard, nautical mile, etc.).
Calculator
From: Inch (in)
To: Centimeter (cm)
About Inch
The inch is an imperial and US customary unit equal to exactly 0.0254 meters. Twelve inches equal one feet; it is used for screen sizes, tools, and fine measurements.
About Centimeter
The centimeter is a metric unit equal to one hundredth of a meter (0.01 m). It is convenient for everyday objects, paper sizes, and body measurements.
How to convert inches to centimeters
1 inch is equal to 2.54 centimeter:
1 in = (0.0254 m ÷ 0.01 m) cm = 2.54 cm
Each inch is defined as 0.0254 m and each centimeter as 0.01 m, so one in equals 0.0254 ÷ 0.01 cm = 2.54 cm.
Let d(in) be the numeric value of the same length measured in Inch (in), and d(cm) the value in Centimeter (cm). Then:
d(cm) = d(in) × (0.0254 / 0.01)
Equivalently, divide by how many in fit into one cm (meters per cm divided by meters per in):
d(cm) = d(in) ÷ 0.39370078740157
Or: centimeter = inch ÷ 0.39370078740157
Examples
Example #1: Convert 20 in to centimeter
20 in = 20 in × (0.0254/0.01) cm = 50.8 cm
20 in = 20 in ÷ 0.39370078740157 = 50.8 cm
Example #2: Convert 50 in to centimeter
50 in = 50 in × (0.0254/0.01) cm = 127 cm
50 in = 50 in ÷ 0.39370078740157 = 127 cm
Summary
To convert Inch to Centimeter, multiply the value in in by the ratio of meters per in divided by meters per cm. Equivalently: value_cm = value_in × (0.0254 / 0.01). Numerically, 1 in equals 2.54 cm.
Relationship context
You are converting between US customary / imperial (Inches) and metric (SI) (Centimeters). Metric units are decimal; imperial units use inches, feet, yards, and miles tied to the international yard definition. Nautical miles are defined in meters (1 nmi = 1,852 m). This tool uses SI-based factors so results stay consistent with modern standards.
Conversion tables
| Inch (in) | Centimeter (cm) |
|---|---|
| 0.1 | 0.254 |
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 7 | 17.78 |
| 8 | 20.32 |
| 9 | 22.86 |
| Inch (in) | Centimeter (cm) |
|---|---|
| 10 | 25.4 |
| 20 | 50.8 |
| 30 | 76.2 |
| 40 | 101.6 |
| 50 | 127 |
| 60 | 152.4 |
| 70 | 177.8 |
| 80 | 203.2 |
| 90 | 228.6 |
| 100 | 254 |
Conversions outside the hub list
The grid on the category page lists hub units only. These pairs include at least one unit outside that hub set (same tools: formulas and tables on each page).
- inch to nmiInch to Nautical Mile
- inch to chainInch to Chain
- inch to fathomInch to Fathom
- inch to umInch to Micrometer
- inch to nmInch to Nanometer
- inch to angstromInch to Angstrom
- inch to pmInch to Picometer
- nmi to cmNautical Mile to Centimeter
- chain to cmChain to Centimeter
- fathom to cmFathom to Centimeter
- um to cmMicrometer to Centimeter
- nm to cmNanometer to Centimeter