The Pound

The avoirdupois pound is equal to 16 ounces. An ounce is equal to 16 drams.

My mom used to say: “A pint’s a pound the world around.”

1 pint = two cups = 16 fluid ounces.

We do not use # to represent pounds, and we don’t add the letter “s” at the end of units of measure to make them plural.

Wrong:  lbs, #

Right:  lbm for mass, or lbf for force

SPE Style Guide prefers lbm/gal to ppg when abbreviating pounds per gallon.

SPE also prefers lbm/ft to ppf when abbreviating pounds per foot.

However, pressures in pounds per square inch use psi as the unit of measure.

Finally, when expressing amounts of the British currency in pounds sterling, use GBP 50 rather than ₤50.

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