lbs to oz and oz to lbs converter

lbs to oz is one multiplication: 1 pound is 16 ounces, so 7.5 lb = 120 oz. Type pounds and the ounces appear while you type, together with the pounds-and-ounces form that scales and baby books use; type ounces to get pounds in the same box.

Example: Weight 7.5 · Direction: lbs to oz (lb → oz) → Answer: 7.5 lb = 120 oz. Source: NIST SP 811, Appendix B.8 – pound (avoirdupois) = 0.45359237 kg, ounce = 28.349523125 g (exact). Updated: 5 October 2026.

Weight

Direction

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Result

Answer: 7.5 lb = 120 oz
Pounds and ounces: In pounds and ounces: 7 lb 8 oz. In metric: 3,401.94 g.
Working: 7.5 lb × 16 = 120 oz
Conversion chart: lb oz
0.25 4
0.5 8
1 16
1.5 24
2 32
2.5 40
3 48
4 64
5 80
6 96
7.5 120
8 128
10 160
12 192
15 240
20 320
25 400
50 800
100 1,600
Weights worth knowing: Weight lb oz
One ounce 0.0625 1
USPS letter limit (3.5 oz) 0.2188 3.5
One stick of butter (4 oz) 0.25 4
Baseball (5 oz) 0.3125 5
A 12 oz steak 0.75 12
One pound 1 16
5 lb bag of sugar 5 80
Newborn of 7 lb 8 oz 7.5 120; These are avoirdupois ounces and pounds: 1 lb = 16 oz exactly. Fluid ounces measure volume and troy ounces (gold, silver) are about 9.7 % heavier, so neither fits this chart.

lb	oz
0.25	4
0.5	8
1	16
1.5	24
2	32
2.5	40
3	48
4	64
5	80
6	96
7.5	120
8	128
10	160
12	192
15	240
20	320
25	400
50	800
100	1,600

Weight	lb	oz
One ounce	0.0625	1
USPS letter limit (3.5 oz)	0.2188	3.5
One stick of butter (4 oz)	0.25	4
Baseball (5 oz)	0.3125	5
A 12 oz steak	0.75	12
One pound	1	16
5 lb bag of sugar	5	80
Newborn of 7 lb 8 oz	7.5	120

How it is calculated

The one-step rule

ounces = pounds × 16 and pounds = ounces ÷ 16. Both numbers are exact: the avoirdupois pound is defined as 0.45359237 kg and the ounce as one sixteenth of it, 28.349523125 g. So 3 lb = 48 oz, 2.5 lb = 40 oz and, going back, 40 oz = 2.5 lb.

Decimal pounds versus pounds and ounces

The most common slip is reading 7.5 lb as 7 lb 5 oz. The part after the decimal point is a fraction of a pound, not a count of ounces: 0.5 lb is 8 oz, so 7.5 lb is 7 lb 8 oz. Quarter pounds are easy to remember: 0.25 lb = 4 oz, 0.75 lb = 12 oz. In the other direction, take away whole pounds first: 53 oz = 3.313 lb (3.3125 before rounding), which is 3 lb 5 oz, because 53 − 3 × 16 = 5. The converter does that split for you under the answer and carries over correctly (you will never see 16 oz next to a pound count).

Three different ounces

This page is about the avoirdupois ounce used for groceries, parcels and body weight. A fluid ounce measures volume (about 29.57 mL for a US fl oz), so a “12 oz can” of soda holds volume, not weight. A troy ounce, used for gold and silver, is 31.1034768 g, roughly 9.7 % more than the 28.3495 g avoirdupois ounce; a troy pound has only 12 of them. If a price quote says “per oz” for a precious metal, it means troy.

Where the numbers matter

Shipping: many carriers change the price at 1 lb, so 15 oz and 16 oz can cost differently; a first-class letter tops out at 3.5 oz.
Newborns: hospitals quote lb and oz, charts quote kilograms. 7 lb 8 oz is 7.5 lb, which is 120 oz or 3,402 g.
Baking and portions: a stick of butter is 4 oz (0.25 lb), a pound of pasta is 16 oz and a 12 oz steak is 0.75 lb.

For other weight units see the kg to lbs converter; for grams per pound see lbs to kg.

Frequently asked questions

How many ounces are in a pound?

Exactly 16 avoirdupois ounces. Half a pound is 8 oz, a quarter pound 4 oz and three quarters of a pound 12 oz.

How many ounces is 1.5 lbs?

1.5 lb = 24 oz. Multiply the pounds by 16: 1.5 × 16 = 24.

How do I turn 53 oz into pounds and ounces?

Divide by 16: 53 oz = 3.313 lb, the same as 3 lb 5 oz (3 × 16 = 48, and 53 − 48 = 5 oz left over).

Is an ounce of weight the same as a fluid ounce?

No. A fluid ounce is a volume (29.57 mL in the US, 28.41 mL in the UK). A weight ounce is 28.35 g. Only for water are they close: a US fluid ounce of water weighs about 1.04 oz.

Are troy ounces different from the ounces in lbs to oz?

Yes. A troy ounce is 31.1034768 g, about 9.7 % heavier than the 28.349523125 g avoirdupois ounce, and there are 12 troy ounces to a troy pound instead of 16.

Sources and legal basis

As of: 5 October 2026 · Editorial policy