🔄 Unit Conversion

Decimal Inches to Fractions Calculator

Convert any decimal inch value to the nearest fractional inch. Choose precision from 1/2" to 1/64" for woodworking, metalworking, and construction measurements.

Enter Decimal Inches
in
Enter a decimal value (e.g., 0.34, 7.125, 0.08)
Result
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📏 Common Decimal to Fraction Conversions

This reference chart shows common decimal inch values and their fractional equivalents. Every machinist, carpenter, and engineer uses these conversions daily.

Decimal (in) Fraction (in) mm Equivalent

📖 How to Convert Decimal Inches to Fractions

Converting a decimal inch measurement to a fraction requires three steps:

  1. Multiply the decimal portion by the denominator. Take the fractional part of your measurement and multiply it by your desired precision (e.g., 16 for sixteenths).
  2. Round to the nearest whole number. This gives you the numerator of your fraction.
  3. Simplify the fraction. Divide both numerator and denominator by their greatest common divisor (GCD).
Fraction = round(decimal × denominator) / denominator
Then simplify by dividing both parts by GCD

Worked Example

Convert 0.34 inches to the nearest 1/16":

  1. 0.34 × 16 = 5.44
  2. Round to 5
  3. Result: 5/16" (already simplified)
  4. Exact decimal: 5 ÷ 16 = 0.3125, error: 0.0275"