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Tip 13: Units of Measure

How do you align different expressions of measurements?

Use the slash (/) in place of ‘per’ between two abbreviated units of measurement.

  • 40 psi/ft
  • 15 cm/s
  • 40 lbm/ft

Use the degree sign (°) with angles, temperatures [except metric K (Kelvin)], and compass coordinates.

  • 20° slope
  • 65°
  • 2°W

Abbreviate units of measurement in the text only when used with numerical values (unless the abbreviation replaces a very long phrase, such as ‘several scf/D’ for ‘several standard cubic feet per day’). 25 ft

  • 50 x 103 ft3/D
  • 10 dm3
  • 3 cm3

Use the same abbreviation for both singular and plural forms of measurements.