ConvBolt — Unit ConverterInches to Centimeters Converter
Converting inches to centimeters is a multiplication by a fixed factor: 1 in = 2.54 cm. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one inch works out to 2.54 cm, the centimeter is the larger unit of the two: a figure given in centimeter always carries a larger number than the same measurement in inch. A chart drawn in in can hide that, so check which label the axis uses before you compare two readings.
DIY and home-improvement work is where this pair shows up most: you measure in inches but the hardware store or an imported product sheet quotes centimeters, so the conversion has to be right the first time.
The conversion factor used here is 2.54 cm per inch (2 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 in a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 0.3937008 in per cm, the exact reciprocal, so a round trip through both pages returns your original number.
Inches to Centimeters formula
Use this formula to convert any inch value to centimeters:
Worked example: 100 in × 2.54 = 254 cm.
Inches to Centimeters conversion table
| Inches (in) | Centimeters (cm) |
|---|---|
| 0.5 in | 1.27 cm |
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 20 in | 50.8 cm |
| 50 in | 127 cm |
| 100 in | 254 cm |
| 500 in | 1270 cm |
| 1000 in | 2540 cm |
How to convert inches to centimeters
Multiply the inch value by 2.54 to get the equivalent in centimeters. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Centimeters to Inches converter instead of dividing by hand; both pages use the same source factors. For every other in conversion in one place, see the in conversion hub.
Frequently asked questions
How many centimeters are in 1 inch?
1 inch = 2.54 cm.
What is 100 inches in centimeters?
100 in = 254 cm.
Is converting inches to centimeters the same as centimeters to inches?
No — the direction changes the multiplier. The reverse conversion (1 cm = 0.3937008 in) is on the Centimeters to Inches page.
Related conversions
Try the ConvBolt Unit Converter for any other length unit, browse the Length conversions, or read our conversion guides.