Convert Pound to Ounce
Convert pounds to ounces instantly. 1 pound = 16.0000000141 ounce — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ounce to Pound converter for the reverse conversion.
Units explained
Pound
The pound (lb) is a unit of mass equal to exactly 0.45359237 kilogram.
From Latin 'libra pondo' (a pound by weight); the symbol lb comes from 'libra'.
The primary weight unit in the United States and informally in the UK.
The international avoirdupois pound was fixed in the 1959 yard-and-pound agreement.
Ounce
The (avoirdupois) ounce (oz) equals one-sixteenth of a pound, about 28.35 grams.
From Latin 'uncia', meaning a twelfth part.
US food portions, postal weights, and boxing weight classes.
Standardized as 1/16 of the international pound from 1959.
Pound to Ounce conversion formula
The relationship between pounds and ounces:
To convert pounds to ounces, multiply the value in pounds by 16.0000000141. To reverse, multiply ounces by 0.0624999999.
How to use this converter
Type a value into the calculator. The result in ounces updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Ounce to Pound converter for the reverse direction.
Step-by-step: convert pounds to ounces
- Write down the value in pounds (lb).
- Multiply that value by the factor 16.0000000141.
- The product is the equivalent value in ounces (oz).
- To reverse, multiply the ounce value by 0.0624999999.
Worked examples
Example 1 — Convert 1 lb to oz:
1 × 16.0000000141 = 16.0000000141 oz
Example 2 — Convert 100 lb to oz:
100 × 16.0000000141 = 1600.000001411 oz
Real-world example — Body height conversion (reverse direction)
You measure 1.75 pounds tall and need to fill in a gym membership form or medical record that asks for height in ounces. This is the most-used everyday length conversion in metric-using countries.
1.75 lb × 16.0000000141 = 28.0000000247 oz
Real-world example — Pet and accessory dimensions
A 3-pound dog leash equals a tidy round value in ounces. Pet-supply shopping frequently mixes the two units across product specifications.
3 lb × 16.0000000141 = 48.0000000423 oz
Real-world example — Fabric and tailoring
One pound of fabric converts to a value in ounces commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.
1 lb × 16.0000000141 = 16.0000000141 oz
Pound to Ounce conversion table
Standard reference values for converting pounds to ounces:
| Pound [lb] | Ounce [oz] |
|---|---|
| 0.01 | 0.1600000001 |
| 0.1 | 1.6000000014 |
| 1 | 16.0000000141 |
| 2 | 32.0000000282 |
| 3 | 48.0000000423 |
| 4 | 64.0000000564 |
| 5 | 80.0000000705 |
| 10 | 160.0000001411 |
| 20 | 320.0000002822 |
| 30 | 480.0000004233 |
| 40 | 640.0000005644 |
| 50 | 800.0000007055 |
| 100 | 1600.000001411 |
| 500 | 8000.0000070548 |
| 1000 | 16000.0000141096 |
Frequently asked questions
How many ounces is 1 pound?
How do I convert pounds to ounces?
How do I convert ounces back to pounds?
How many ounces is 100 pounds?
Popular weight unit conversions
Convert Pound to other weight units
Show all Pound conversions
Metric / SI (18 units)
Avoirdupois (14 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 lb = 16.0000000141 oz) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.