Convert Pound to Ounce
1 pound = 16 ounce (oz). For example, 10 pound = 160 ounce and 100 pound = 1,600 ounce. Type any value below to convert pound to ounce both ways — it runs entirely in your browser.
Quick answer: Pound to Ounce
1 Pound = 16 Ounce (lb → oz). To convert pound to ounce, multiply by 16. To convert ounce to pound, multiply by 0.0625. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common pound-to-ounce questions.
How to convert Pound to Ounce
To convert pound to ounce, multiply the number of pound by the conversion factor 16, because 1 lb = 16 oz. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 oz = 0.0625 lb, so you divide by 16 (or multiply by 0.0625) to turn ounce back into pound.
oz = lb × 16 ·
lb = oz × 0.0625
- Write down the value you want to convert, in pound.
- Multiply it by 16.
- The result is the same area/length/quantity expressed in ounce.
Pound to Ounce — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 pound is 80 ounce because 5 lb × 16 = 80 oz.
| Pound | Calculation | Ounce |
|---|---|---|
| 1 lb | 1 lb × 16 = 16 oz | 16 oz |
| 2 lb | 2 lb × 16 = 32 oz | 32 oz |
| 3 lb | 3 lb × 16 = 48 oz | 48 oz |
| 5 lb | 5 lb × 16 = 80 oz | 80 oz |
| 7 lb | 7 lb × 16 = 112 oz | 112 oz |
| 10 lb | 10 lb × 16 = 160 oz | 160 oz |
| 12 lb | 12 lb × 16 = 192 oz | 192 oz |
| 15 lb | 15 lb × 16 = 240 oz | 240 oz |
| 20 lb | 20 lb × 16 = 320 oz | 320 oz |
| 25 lb | 25 lb × 16 = 400 oz | 400 oz |
| 50 lb | 50 lb × 16 = 800 oz | 800 oz |
| 100 lb | 100 lb × 16 = 1,600 oz | 1,600 oz |
Common Pound to Ounce conversions
These are the pound-to-ounce values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 pound = 16 ounce
- 2 pound = 32 ounce
- 2.5 pound = 40 ounce
- 3 pound = 48 ounce
- 4 pound = 64 ounce
- 5 pound = 80 ounce
- 6 pound = 96 ounce
- 7 pound = 112 ounce
- 8 pound = 128 ounce
- 9 pound = 144 ounce
- 10 pound = 160 ounce
- 12 pound = 192 ounce
- 15 pound = 240 ounce
- 20 pound = 320 ounce
- 25 pound = 400 ounce
- 30 pound = 480 ounce
- 50 pound = 800 ounce
- 75 pound = 1,200 ounce
- 100 pound = 1,600 ounce
- 200 pound = 3,200 ounce
- 500 pound = 8,000 ounce
- 1000 pound = 16,000 ounce
Pound to Ounce conversion chart (both directions)
The chart below converts pound to ounce and ounce to pound side by side, so it works whichever way you need. 1 pound = 16 ounce, and 1 ounce = 0.0625 pound.
| Pound → Ounce | Ounce → Pound |
|---|---|
| 0.25 lb = 4 oz | 0.25 oz = 0.015625 lb |
| 0.5 lb = 8 oz | 0.5 oz = 0.03125 lb |
| 1 lb = 16 oz | 1 oz = 0.0625 lb |
| 2 lb = 32 oz | 2 oz = 0.125 lb |
| 3 lb = 48 oz | 3 oz = 0.1875 lb |
| 4 lb = 64 oz | 4 oz = 0.25 lb |
| 5 lb = 80 oz | 5 oz = 0.3125 lb |
| 6 lb = 96 oz | 6 oz = 0.375 lb |
| 7 lb = 112 oz | 7 oz = 0.4375 lb |
| 8 lb = 128 oz | 8 oz = 0.5 lb |
| 9 lb = 144 oz | 9 oz = 0.5625 lb |
| 10 lb = 160 oz | 10 oz = 0.625 lb |
| 12 lb = 192 oz | 12 oz = 0.75 lb |
| 15 lb = 240 oz | 15 oz = 0.9375 lb |
| 20 lb = 320 oz | 20 oz = 1.25 lb |
| 25 lb = 400 oz | 25 oz = 1.5625 lb |
| 30 lb = 480 oz | 30 oz = 1.875 lb |
| 40 lb = 640 oz | 40 oz = 2.5 lb |
| 50 lb = 800 oz | 50 oz = 3.125 lb |
| 75 lb = 1,200 oz | 75 oz = 4.6875 lb |
| 100 lb = 1,600 oz | 100 oz = 6.25 lb |
| 150 lb = 2,400 oz | 150 oz = 9.375 lb |
| 200 lb = 3,200 oz | 200 oz = 12.5 lb |
| 250 lb = 4,000 oz | 250 oz = 15.625 lb |
| 500 lb = 8,000 oz | 500 oz = 31.25 lb |
| 1000 lb = 16,000 oz | 1000 oz = 62.5 lb |
Pound vs Ounce: which is bigger?
A pound is the larger unit: one pound equals 16 ounces. Put another way, you need 16 ounces to make a single pound.
What is a Pound? History, origin and usage
The pound descends from the Roman libra pondo — "a pound by weight". English kept "pound" from pondo and the abbreviation "lb" from libra, which is why the word and its symbol look unrelated. For centuries the pound differed between countries and even between trades. That ended on 1 July 1959, when the United States, United Kingdom, Canada, Australia, New Zealand and South Africa agreed a single international pound of exactly 0.453 592 37 kilograms.
The pound is the everyday weight unit in the United States and is still widely used in the United Kingdom for body weight, food and parcels. Body weight, groceries, baggage limits and shipping rates in the US are all quoted in pounds.
Because the 1959 agreement fixed the pound as an exact number of kilograms, every pound conversion on this site is exact rather than approximate. The same agreement fixed the yard at exactly 0.9144 metres — which is why it is known as the yard-and-pound agreement.
What is a Ounce? History, origin and usage
The ounce comes from the Latin uncia, meaning a twelfth part — originally a twelfth of the Roman libra. English later reorganised its weights around the avoirdupois system, in which the pound is divided into sixteen ounces rather than twelve, and that sixteenth is the ounce used for ordinary goods today.
Ounces are used for food packaging, recipes, letters and small parcels in the United States, and for some foods and postal rates in the United Kingdom. Recipe writers use them constantly for butter, flour and cheese.
The same Latin root uncia also gave English the word "inch" — a twelfth of a foot. Confusingly, the troy ounce used for gold is a different and heavier ounce, and a "fluid ounce" is a measure of volume, not weight at all.
Convert 1 Pound to other units
It can help to see a pound next to the other units it is commonly compared with. One pound (lb) is equal to:
| 1 Pound equals | Unit |
|---|---|
| 0.4535924 kg | Kilogram |
| 453.5924 g | Gram |
| 453,592.4 mg | Milligram |
| 453,592,400 µg | Microgram |
| 0.0004535924 t | Tonne |
| 0.004535924 q | Quintal |
| 16 oz | Ounce |
| 0.07142857 st | Stone |
| 0.0005 ton (US) | Short ton |
| 0.0004464286 ton (UK) | Long ton |
| 14.58333 oz t | Troy ounce |
| 7,000 gr | Grain |
| 2,267.962 ct | Carat |
Convert 1 Ounce to other units
One ounce (oz) is equal to:
| 1 Ounce equals | Unit |
|---|---|
| 0.02834952 kg | Kilogram |
| 28.34952 g | Gram |
| 28,349.52 mg | Milligram |
| 28,349,520 µg | Microgram |
| 0.00002834952 t | Tonne |
| 0.0002834952 q | Quintal |
| 0.0625 lb | Pound |
| 0.004464286 st | Stone |
| 0.00003125 ton (US) | Short ton |
| 0.00002790179 ton (UK) | Long ton |
| 0.9114583 oz t | Troy ounce |
| 437.5 gr | Grain |
| 141.7476 ct | Carat |
Tips for converting Pound to Ounce
- To go from pound to ounce, multiply by 16; to go back, divide by 16 (or multiply by 0.0625).
- For a quick mental estimate, remember that 1 pound ≈ 16 ounce, so 10 pound ≈ 160 ounce.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Pound to Ounce converter
Type a number into the Pound field and the equivalent in Ounce appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Ounce field to convert the other way (ounce to pound). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 lb = 16 oz), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for pound-to-ounce conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- NIST Special Publication 811 — Guide for the Use of the SI — publishes the exact metric equivalents of the customary weight units. The 1959 international yard-and-pound agreement fixes the international avoirdupois pound at exactly 0.453 592 37 kilogram, and the ounce, stone, grain and both tons are defined as exact fractions or multiples of that pound — so every imperial weight on this page is exact, not rounded.
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
Weight factors here are exact, anchored to the kilogram: the international pound is exactly 0.45359237 kg, a stone is 14 pounds, a short ton is 2,000 pounds and a long ton is 2,240, a grain is 1/7000 of a pound and a metric carat is exactly 200 mg. So the live tool and every number on this page always agree.
Frequently asked questions
- How many ounce are in 1 pound?
- 1 pound = 16 ounce (oz). To convert any number of pound to ounce, multiply by 16.
- How do I convert pound to ounce?
- Multiply the number of pound by 16. For example, 10 pound = 10 × 16 = 160 ounce, and 25 pound = 400 ounce.
- How many pound are in 1 ounce?
- 1 ounce = 0.0625 pound. So to convert ounce back to pound, multiply by 0.0625.
- What is the formula to convert pound to ounce?
- ounce = pound × 16. The reverse formula is pound = ounce × 0.0625.
- How much is 100 pound in ounce?
- 100 pound = 1,600 ounce. (And 1000 pound = 16,000 ounce.)
- Which is bigger, a pound or a ounce?
- A pound is larger: 1 pound = 16 ounce.
- Is this pound to ounce converter accurate?
- Yes — every value is computed from the exact 16 oz per lb factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert ounce to pound too?
- Yes. The converter works both ways — enter a value in either field. 1 ounce = 0.0625 pound.