Pounds to Ounces — lb to oz

To convert pounds to ounces, multiply by 16: the avoirdupois pound is exactly 16 ounces. For example, 2.5 lb = 40 oz, and 0.75 lb = 12 oz.

How to use the pounds to ounces converter

1. Enter the weight in pounds, for example 3.2.
2. Read the pounds to ounces converter result: 3.2 × 16 = 51.2 oz.
3. For pounds and ounces, multiply only the decimal part: 0.2 × 16 = 3.2, so 3 lb 3.2 oz.

What is the pounds to ounces formula?

ounces = pounds × 16

The reverse is pounds = ounces × 0.0625.

The avoirdupois pound is defined as exactly 0.45359237 kg and the ounce as 1/16 pound (28.349523125 g), so the factor is exact.

What are pounds and ounces?

Mass is the amount of matter in an object; the SI base unit is the kilogram. Everyday weight units such as pounds, ounces and stones are mass units in practice. The avoirdupois pound is defined as exactly 0.45359237 kg.

• Pound (lb): 1 lb = 0.45359237 kg (US/Imperial unit).
• Ounce (oz): 1 oz = 0.02834952313 kg (US/Imperial unit).

Pounds to ounces worked examples

• 1.25 lb of ground beef: 1.25 × 16 = 20 oz
• A 2.5 lb bag: 2.5 × 16 = 40 oz
• A 7.5 lb baby: 7.5 × 16 = 120 oz

Conversion chart

lb	oz	lb	oz
0.25	4	3	48
0.5	8	4	64
0.75	12	5	80
1	16	6	96
1.25	20	7	112
1.5	24	8	128
2	32	10	160
2.5	40	20	320

Values are rounded to four decimal places, or two for results of 100 or more.

Quick mental conversion

Multiply by 16. For quarter pounds: 0.25 lb = 4 oz, 0.5 lb = 8 oz, 0.75 lb = 12 oz.

Decimal pounds to pounds and ounces

Decimal lb	Pounds and ounces
1.1	1 lb 1.6 oz
2.3	2 lb 4.8 oz
5.6	5 lb 9.6 oz
7.4	7 lb 6.4 oz
8.8	8 lb 12.8 oz

Pounds from ounces: reverse chart

Going the other way, pounds = ounces × 0.0625. Common values:

ounces	pounds
1	0.0625
2	0.125
5	0.3125
10	0.625
20	1.25
50	3.125
100	6.25
500	31.25
1,000	62.5

Ounces and grams per pound

Each ounce is exactly 28.349523125 g and each pound exactly 453.59237 g:

Pounds	Ounces	Grams
0.25	4	113.4
0.5	8	226.8
1	16	453.6
1.5	24	680.4
2	32	907.2
5	80	2,268
10	160	4,535.9

For lbs to oz to kg, divide grams by 1,000.

Birth weights in pounds and ounces

US birth weights are given in pounds and ounces, while hospitals elsewhere weigh in grams. To convert, divide grams by 453.59237 for decimal pounds, then multiply the decimal part by 16 for ounces. Examples:

Grams	lb and oz
2,500	5 lb 8.2 oz
3,000	6 lb 9.8 oz
3,500	7 lb 11.5 oz
4,000	8 lb 13.1 oz

Use the kg to lbs converter for adults and the ounces to pounds converter for the reverse.

Price per pound and per ounce

Shelf labels sometimes compare products by different units. Coffee at $3.99 per pound is about 25 cents per ounce, while a small bag at $1.50 for 4 oz is 37.5 cents per ounce. Converting pounds to ounces makes the better deal obvious.

Shipping carriers round up. A parcel at 2.1 lb is 33.6 oz; with most carriers it will be billed as 3 lb. If you are close to a break point, trimming packaging can save money.

Fishing line and kitchen scales

Fishing line is rated in pound-test, the force needed to break it. A 6 lb test line breaks at about 96 ounces of pull, though knots reduce that.

Kitchen scales often show pounds and ounces together, like 1 lb 4 oz. That is 20 oz in total, or 1.25 lb in decimal form. Recipes from the UK may use pounds and ounces, while US baking recipes increasingly use ounces alone, so a pounds to ounces conversion keeps measures consistent. Note that these are weight ounces, not fluid ounces; a cup of flour and a cup of water weigh very different amounts.

Baby weights at birth are recorded as pounds and ounces in the US, such as 7 lb 8 oz, which is 120 oz. Doctors then track gains in ounces per day or per week.

For quick sums, every quarter pound is 4 oz, so 2.75 lb is 44 oz without a calculator.

Related converters and calculators

Related conversions:

• Ounces to pounds: oz to lb
• Grams to ounces: g to oz
• kg to lbs: kg to lb
• lbs to kg: lb to kg
• Weight converter: kg, lb, oz

Sources

NIST Special Publication 811, Appendix B; NIST: SI units – mass.

Questions about this calculator