MeasureCalc

Convert Pound (lb) to Ounce (oz)

Category: Mass

16 oz

1 lb = 16 oz

Precision: 6 decimals; very small non-zero results use significant digits.

How to convert pound (lb) to ounce (oz)

Mass quantifies the amount of matter. The kilogram is defined by Planck’s constant, which anchors mass to fundamental physics. In practice, grams and pounds dominate everyday use—from recipes and parcels to body weight—while tonnes and long tons appear in logistics and industry.

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Quick conversion table

Handy values for Pound (lb) to Ounce (oz). Click a value to calculate that result.

Pound (lb) Ounce (oz)
16
8
40
160

Conversion formula

Use the following formula:

Ounce (oz) ≈ Pound (lb) × 16

Convert mass from Pound (lb) to Ounce (oz) using a fixed unit ratio. Round only the final result.

Common mistakes

  • Confusing mass (lb) with force (lbf) in engineering contexts.
  • Mixing metric tonnes (t) with short/long tons.

Unit facts

  • Pound (lb): The (avoirdupois) pound is exactly 0.45359237 kg (1959). Still used for body weight and groceries in US/UK.
  • Ounce (oz): An ounce (avoirdupois) is exactly 28.349523125 g. Note: precious metals use the troy ounce (~31.1035 g).

About Pound (lb)

Pound (lb)

Imperial/US unit of mass; exactly 0.45359237 kg. Popular for body weight, groceries, and engineering specs in US industry.

History: Standardized in 1959; traces back to the Roman libra. Different historical pounds existed (avoirdupois, troy) before modern unification.

About Ounce (oz)

Ounce (oz)

Equals 1/16 lb; exactly 28.349523125 g. Used for portions, postage, and precious metals (note: troy ounce differs).

History: Medieval trade used multiple ounces; today the avoirdupois ounce dominates in retail while troy ounce survives in bullion markets.

Frequently asked questions

How many Ounce (oz) are in one Pound (lb)?
1 Pound (lb) equals 16 Ounce (oz).
Is Pound (lb) to Ounce (oz) conversion exact?
Many unit conversions are exact by definition, while others use standardized conversion constants.
What is the fastest way to convert Pound (lb) to Ounce (oz)?
Enter a value in Pound (lb), choose Ounce (oz) as the target unit, and the calculator will instantly return the result.

Convert Pound (lb) to other units

Convert other units to Ounce (oz)