Inches to Centimeters Converter
Convert inches to centimeters instantly with our free online calculator. Essential for international shipping, screen sizes, furniture dimensions, height measurements, and DIY projects.
Conversion Formula
| Conversion | Formula | Example |
|---|---|---|
| inches to cm | inches × 2.54 | 10 in = 25.4 cm |
| cm to inches | cm ÷ 2.54 | 25.4 cm = 10 in |
Quick Reference Table
| Inches | Centimeters | Common Use |
|---|---|---|
| 1 in | 2.54 cm | Small measurements |
| 6 in | 15.24 cm | Phone screen |
| 12 in | 30.48 cm | 1 foot / ruler |
| 24 in | 60.96 cm | Small monitor |
| 32 in | 81.28 cm | TV size |
| 55 in | 139.7 cm | Large TV |
| 72 in | 182.88 cm | 6 feet / door height |
Screen Size Conversions
| Diagonal (inches) | Diagonal (cm) | Device Type |
|---|---|---|
| 5.5" | 14 cm | Smartphone |
| 10.2" | 25.9 cm | Tablet |
| 13.3" | 33.8 cm | Laptop |
| 24" | 61 cm | Desktop monitor |
| 27" | 68.6 cm | Large monitor |
| 55" | 139.7 cm | Television |
| 65" | 165.1 cm | Large TV |
Height Conversion (Feet/Inches to cm)
| Height | Inches | Centimeters |
|---|---|---|
| 5'0" | 60" | 152.4 cm |
| 5'4" | 64" | 162.56 cm |
| 5'7" | 67" | 170.18 cm |
| 5'10" | 70" | 177.8 cm |
| 6'0" | 72" | 182.88 cm |
| 6'2" | 74" | 187.96 cm |
| 6'4" | 76" | 193.04 cm |
Conversion Code Example
``javascript
function inchesToCm(inches) {
return inches * 2.54;
}
function cmToInches(cm) {
return cm / 2.54;
}
function feetInchesToCm(feet, inches) {
return (feet * 12 + inches) * 2.54;
}
// Examples
console.log(inchesToCm(12)); // 30.48
console.log(feetInchesToCm(5, 10)); // 177.8
``
Paper Size Reference
| Size | Inches | Centimeters |
|---|---|---|
| Letter | 8.5" × 11" | 21.6 × 27.9 cm |
| Legal | 8.5" × 14" | 21.6 × 35.6 cm |
| A4 | 8.27" × 11.69" | 21 × 29.7 cm |
| A5 | 5.83" × 8.27" | 14.8 × 21 cm |
Fractional Inches to CM
| Fraction | Decimal | CM |
|---|---|---|
| 1/4" | 0.25" | 0.64 cm |
| 1/2" | 0.50" | 1.27 cm |
| 3/4" | 0.75" | 1.91 cm |
| 1/8" | 0.125" | 0.32 cm |
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 in with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 in becomes | Error |
|---|---|---|---|
| 0 | 3 | 411 | 18.1102% |
| 1 | 2.5 | 342.5 | 1.5748% |
| 2 | 2.54 | 347.98 | — |
| 3 | 2.54 | 347.98 | — |
| 4 | 2.54 | 347.98 | — |
The right number of significant figures is set by your input, not by the converter. If you measured inches to three significant figures, the answer in centimeters is only good to three — writing more digits claims precision the measurement never had.