Practical measurement guide
Fraction Inch to CM Chart
Compare common inch fractions with centimeter equivalents and rounding notes.
Common ruler eighths convert to centimeters by multiplying decimal inches by 2.54. 1/2 inch is exactly 1.27 cm.
in
Decimals and fractions work, for example 1.5, 1/2, or 1 1/2.
cm
Try a value
Fractions
0.5 in = 1.27 cm
0.5 in × 2.54 = 1.27 cm
Decimal inches0.5 in
Feet + inches0 ft 0.5 in
Nearest 1/16 inch1/2"
How to convert fraction inches to cm
Divide the numerator by the denominator to get decimal inches, then multiply by 2.54. For example, 1/2 inch is 0.5 × 2.54 = 1.27 cm.
Common eighths in centimeters
| Fraction | Decimal inches | Centimeters | Millimeters |
|---|---|---|---|
| 1/8 inch in cm | 0.125 in | 0.3175 cm | 3.175 mm |
| 1/4 inch in cm | 0.25 in | 0.635 cm | 6.35 mm |
| 3/8 inch in cm | 0.375 in | 0.9525 cm | 9.525 mm |
| 1/2 inch in cm | 0.5 in | 1.27 cm | 12.7 mm |
| 5/8 inch in cm | 0.625 in | 1.5875 cm | 15.875 mm |
| 3/4 inch in cm | 0.75 in | 1.905 cm | 19.05 mm |
| 7/8 inch in cm | 0.875 in | 2.2225 cm | 22.225 mm |
Related measurement tools
Frequently asked questions
How do you convert a fraction of an inch to cm?
Divide the numerator by the denominator, then multiply by 2.54.
What is 1/2 inch in cm?
1/2 inch is exactly 1.27 centimeters.
Does this chart replace dedicated fraction pages?
No. Use the chart to scan common eighths, then open the dedicated page for that fraction.