Inches To Decimal Conversion Calculator

Inches to Decimal Calculator

Enter your measurement’s whole inches in inches to decimal calculator e.g., 5 3/4 inches or 12 1/8 inches. Input fraction numerator (top number), select denominator (bottom number) and select decimal places. The calculator converts the fractional measurement to decimal inches.

  • Input: Measurement = 2 1/2 inches
  • Calculation: Decimal Equivalent = 2 + (1 / 2) = 2 + 0.5 = 2.5 inches
  • Result: Decimal Equivalent = 2.5 inches

Inches to Decimal Conversion Chart

ExampleMeasurement (Inches)Whole NumberFractionCalculationDecimal Equivalent (Inches)
Simple Fraction2 1/221/22 + (1 / 2) = 2 + 0.5 = 2.52.5 inches
Common Fraction3 3/433/43 + (3 / 4) = 3 + 0.75 = 3.753.75 inches
Smaller Fraction7 1/871/87 + (1 / 8) = 7 + 0.125 = 7.1257.125 inches
Larger Fraction10 5/16105/1610 + (5 / 16) = 10 + 0.3125 = 10.312510.3125 inches
Mixed Fraction15 7/32157/3215 + (7 / 32) = 15 + 0.21875 = 15.2187515.21875 inches
5/8 Inches5/805/80 + (5 / 8) = 0 + 0.625 = 0.6250.625 inches
7/8 Inches7/807/80 + (7 / 8) = 0 + 0.875 = 0.8750.875 inches
4 Inches44None4 + (0) = 44.0 inches
18 Inches1818None18 + (0) = 1818.0 inches
38 Inches3838None38 + (0) = 3838.0 inches

How to Convert Inches to Decimal

Separate Whole and Fractional Parts, (e.g., 6 3/8 becomes 6 and 3/8). Convert Fraction to Decimal: Divide the numerator (top number) of the fraction by the denominator (bottom number). For example: Fraction = 3 / 8 = 0.375.

Add Whole Number and Decimal: Add the whole number of inches to the decimal result of the fraction: Whole Number + Decimal = 6 + 0.375 = 6.375

  • Inputs: Board length 3 7/8 inches
  • Calculations: 3 + (7 ÷ 8) = 3 + 0.875
  • Result: 3.875 inches

Fraction to Decimal Conversion Formula

Decimal = Whole + (Numerator ÷ Denominator)

Common Fractions:
1/2 = 0.500
1/4 = 0.250
1/8 = 0.125
1/16 = 0.0625

Basic Measurement

  • Inputs: 1 3/4 inches
  • Calculations: 1 + (3 ÷ 4)
  • Result: 1.750 inches

Complex Fraction

  • Inputs: 5 11/16 inches
  • Calculations: 5 + (11 ÷ 16)
  • Result: 5.6875 inches

Simple Fraction

  • Inputs: 2 1/2 inches
  • Calculations: 2 + (1 ÷ 2)
  • Result: 2.500 inches

Fine Measurement

  • Inputs: 3 5/32 inches
  • Calculations: 3 + (5 ÷ 32)
  • Result: 3.156 inches

Precise Cut

  • Inputs: 4 13/16 inches
  • Calculations: 4 + (13 ÷ 16)
  • Result: 4.8125 inches

What is Inches and Decimal?

Fractional inches represent measurements using whole numbers plus fractions, common in woodworking and construction. Decimal inches express the same measurements in decimal format, preferred in engineering and precision work.

Standard Fractions: 1/2, 1/4, 1/8, 1/16, 1/32, 1/64
Decimal Places: 2-4 for most applications

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