How to Read a Ruler Calculator

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1 inch = 25.4 millimeters

Understanding Ruler Measurements

Imperial Measurements

A standard ruler is divided into:

  • Inches (largest marks)
  • Half inches (1/2")
  • Quarter inches (1/4")
  • Eighth inches (1/8")
  • Sixteenth inches (1/16")

Metric Measurements

Metric rulers show:

  • Centimeters (cm)
  • Millimeters (mm)
  • 1 cm = 10 mm
  • 1 inch = 2.54 cm
  • 1 inch = 25.4 mm