Convert Pounds to Ounces
1 pound (lb) equals 16 ounces (oz).
1 lb = 16 oz
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound to ounce converter to paste a column from Excel.
How to Convert Pound to Ounce
- 1 lb = 16 oz
- 1 oz = 0.0625 lb
- Example: convert 15 lb to oz: 15 lb = 15 × 16 oz = 240 oz
Reference conditions. lb: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement). oz: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
oz = lb × 16
Derivation from SI units:
- 1 lb = 0.45359237 kg (exact, 1959 international agreement)
- 1 oz = 1/16 lb = 28.349523125 g (exact)
- 1 lb = 0.45359237 kg ÷ 0.028349523125 kg per oz = 16 oz
Both units are defined exactly, so the factor is exact. Pound definition: pound; Ounce definition: ounce.
Worked examples
- A 1.5 lb roast is 24 oz.
1.5 lb × 16 = 24 oz - A baby weighing 7.5 lb weighs 120 oz (7 lb 8 oz).
7.5 lb × 16 = 120 oz
Pound to Ounce conversion table
| Pounds (lb) | Ounces (oz) |
|---|---|
| 0.25 lb | 4 oz |
| 0.5 lb | 8 oz |
| 1 lb | 16 oz |
| 2 lb | 32 oz |
| 3 lb | 48 oz |
| 5 lb | 80 oz |
| 10 lb | 160 oz |
| 15 lb | 240 oz |
| 20 lb | 320 oz |
| 25 lb | 400 oz |
| 30 lb | 480 oz |
| 40 lb | 640 oz |
| 50 lb | 800 oz |
| 100 lb | 1600 oz |
| 120 lb | 1920 oz |
| 130 lb | 2080 oz |
| 140 lb | 2240 oz |
| 150 lb | 2400 oz |
| 160 lb | 2560 oz |
| 170 lb | 2720 oz |
| 180 lb | 2880 oz |
| 200 lb | 3200 oz |
| 220 lb | 3520 oz |
| 250 lb | 4000 oz |
| 300 lb | 4800 oz |
Where it's used
Decimal pounds are converted to ounces for baby weights, postage and recipes, often written as pounds and ounces. Multiply by 16.
Pound to other weight and mass units
| Conversion | 1 lb equals |
|---|---|
| pound to kilogram | 0.45359237 kg |
| pound to gram | 453.59237 g |
| pound to milligram | 453592.37 mg |
| pound to microgram | 453592370 µg |
| pound to metric ton | 0.00045359237 t |
| pound to ounce | 16 oz |
| pound to stone | 0.07142857143 st |
| pound to short ton | 0.0005 ton (US) |
| pound to long ton | 0.0004464285714 ton (UK) |
| pound to grain | 7000 gr |
| pound to troy ounce | 14.58333333 oz t |
| pound to carat | 2267.96185 ct |
Frequently asked questions
How many ounces are in a pound?
Exactly 16 (avoirdupois).
How many ounces are in 1 pound?
1 lb = 16 oz.
How do I convert pounds to ounces?
Multiply the value in lb by 16. For example, 15 lb × 16 = 240 oz.
Is the lb to oz conversion exact?
Yes. Both units are defined exactly, and 1 lb is exactly 16 oz.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound (avoirdupois) (lb)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "ounce (avoirdupois) (oz)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Pounds to Ounces. Retrieved October 17, 2026, from https://scientificconverters.com/mass/pounds-to-ounces/
IEEE
Scientific Converters, "Convert Pounds to Ounces," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/pounds-to-ounces/