Practical measurement guide
Fraction Converters
Convert decimal inches and fractional inches with ruler-friendly precision, nearby fractions, and metric equivalents.
Fraction converters help translate decimal inches, ruler fractions, centimeters, and millimeters without mixing exact and rounded values.
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"
Fraction conversion hub
Fraction pages are for ruler and workshop increments such as halves, quarters, eighths, sixteenths, thirty-seconds, and sixty-fourths.
How to avoid rounding mistakes
Convert the fraction to decimal inches first, then convert to centimeters or millimeters. Keep the nearest fraction separate from the exact decimal value.
Related measurement tools
Frequently asked questions
Which fractions are useful for rulers?
Halves, quarters, eighths, sixteenths, thirty-seconds, and sixty-fourths are common ruler increments.
Should I round before converting?
Convert first when possible, then round the displayed value for the task.