Fraction to Centimeters Calculator
Convert fractional inches (e.g. 1/2 inch) to centimeters (cm) with precision. Great for fabric, body measurements, and everyday metric conversions.
Enter Your Fraction
Results update instantly+
inches
=
—
cmDecimal places:
Common Fraction Presets
Reference Table
Click any row to load that fraction into the calculator.
| Fraction | Decimal Inches | cm |
|---|---|---|
| 1/16" | 0.062500" | 0.1588 cm |
| 1/8" | 0.125000" | 0.3175 cm |
| 3/16" | 0.187500" | 0.4763 cm |
| 1/4" | 0.250000" | 0.6350 cm |
| 5/16" | 0.312500" | 0.7937 cm |
| 3/8" | 0.375000" | 0.9525 cm |
| 7/16" | 0.437500" | 1.1113 cm |
| 1/2" | 0.500000" | 1.2700 cm |
| 9/16" | 0.562500" | 1.4287 cm |
| 5/8" | 0.625000" | 1.5875 cm |
| 11/16" | 0.687500" | 1.7463 cm |
| 3/4" | 0.750000" | 1.9050 cm |
| 13/16" | 0.812500" | 2.0638 cm |
| 7/8" | 0.875000" | 2.2225 cm |
| 15/16" | 0.937500" | 2.3813 cm |
| 1" | 1.000000" | 2.5400 cm |
Formula
cm = (whole + numerator ÷ denominator) × 2.54
Example: 1/2 inch = 0.5 × 2.54 = 1.27 cm | 1 inch = 2.54 cm exactly (by definition)
Quick Facts
- 11 inch = 2.54 cm exactly — defined since 1959 by international agreement.
- 21/4 inch = 0.635 cm, 1/2 inch = 1.27 cm, 3/4 inch = 1.905 cm, 1 inch = 2.54 cm.
- 3Centimeters are widely used for body measurements, fabric, and everyday objects.
- 4For smaller precision, use the Fraction to MM calculator (1 cm = 10 mm).
- 5To reverse: divide cm by 2.54 to get decimal inches.
How to Use
- 1Enter a whole number (optional) — e.g. 1 for 1¾"
- 2Type the numerator (top number) of your fraction
- 3Type the denominator (bottom number)
- 4Result updates instantly — or click a preset
Unit Reference
1 inch25.4 mm
1 inch2.54 cm
1/2 inch0.5000"
1/4 inch0.2500"
1/8 inch0.1250"
1/16 inch0.0625"