How do I convert lbs to oz?
Type a value in either box, and the answer shows it in the other unit as you type.
- Ounces (oz)
- 16
1 lb = 16 oz.
Ounces (oz): 16. 1 lb = 16 oz.
Ounces (oz) by pounds (lb)
How to calculate
Converts pounds (lb) to ounces (oz) and back, with the exact unit definitions.
Example with the default inputs (Pounds (lb) 1): 1 lb = 16 oz.
Formula: oz = lb × 16
- 1 pound = 16 ounces, from the exact definitions in NIST SP 811.
- Ounces here are avoirdupois ounces, a weight: 1 oz = 1/16 lb = 28.349523125 g. A US fluid ounce is a volume.
- Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up; an answer of 1 billion or more shows at most 15 significant digits.
Worked examples
Each example is checked against the calculator on every build.
- Pounds (lb) 1 gives Ounces (oz) 16.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
- Pounds (lb) 2.5 gives Ounces (oz) 40.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
- Ounces (oz) 40 gives Pounds (lb) 2.5.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
Other questions people ask
How many ounces are in a pound?
1 pound is 16 ounces, from the exact unit definitions (NIST SP 811).
How do I convert lbs to oz?
Multiply by 16: oz = lb × 16. For example, 1 lb × 16 = 16 oz.
How do I convert oz back to lbs?
Multiply by 0.0625, or type the ounces into the second box and the converter works it out. 1 ounce is 0.0625 pounds.
Is an ounce here a weight or a volume?
A weight: the avoirdupois ounce, 1/16 of a pound (28.349523125 g exactly). A US fluid ounce (29.57 mL) measures volume, as on cups-to-ounces pages.
What is 2.5 lbs in ounces?
40 oz: 2.5 × 16. In pounds and ounces that is 2 lb 8 oz.
How many ounces are in half a pound?
8 oz. A quarter pound is 4 oz.