How many ounces are in a pound?

There are exactly 16 ounces in one pound, as defined by NIST HB 44.

How do I convert 1.5 pounds to ounces?

Multiply 1.5 by 16 to get 24 ounces.

How many pounds is 48 ounces?

48 ounces equals 3 pounds (48 ÷ 16 = 3).

Why are cooking weights in ounces instead of grams?

US recipes traditionally use the avoirdupois system of pounds and ounces. Many modern recipes also include grams for precision, since 1 gram is a finer measurement than 1 ounce.

What is the difference between a fluid ounce and a weight ounce?

A fluid ounce measures volume (≈29.574 mL); a weight ounce measures mass (28.35 g). They are not interchangeable — water happens to be close, but other ingredients differ significantly.

Pounds to Ounces Converter

Convert Pounds to Ounces

The relationship between pounds and ounces is exact: 1 pound (lb) equals exactly 16 ounces (oz), as defined by NIST HB 44. This is the avoirdupois system used throughout the US for food weight — not to be confused with the fluid ounce, which measures volume.

The formula

ounces = pounds × 16
pounds = ounces ÷ 16

The factor of 16 is exact and defined — no rounding, no approximation.

Practical examples

Example 1: A recipe calls for 1.5 lbs of ground beef. How many ounces? 1.5 × 16 = 24 oz

Example 2: A cheese block is labeled 12 oz. How many pounds? 12 ÷ 16 = 0.75 lb (¾ of a pound)

Example 3: A roast is 3 lbs 6 oz. What is the total in ounces? (3 × 16) + 6 = 48 + 6 = 54 oz

Common mistakes

Mixing up weight ounces and fluid ounces. A weight ounce (oz) measures mass (≈28.35 g). A fluid ounce (fl oz) measures volume (≈29.574 mL). They are not the same. Water is close — 1 fl oz of water weighs nearly 1 oz — but most other ingredients differ significantly.

Assuming a can label is weight. Food cans may label "14 oz" as net weight — sometimes in fluid ounces for liquid products (like tomatoes in juice). Always check whether the label specifies weight or volume.

Confusing the troy ounce. Precious metals (gold, silver) use troy ounces (31.1 g), not avoirdupois ounces (28.35 g). Food and cooking always use avoirdupois.

International and regional variations

System	1 pound equals	Used for
Avoirdupois (US/UK)	16 oz = 453.592 g	Food, general merchandise
Troy (precious metals)	12 troy oz = 373.24 g	Gold, silver, gemstones
Metric (most of world)	Not used — kilograms and grams instead	All purposes

Quick reference

Pounds (lb)	Ounces (oz)	Grams (g)
¼	4	113.4
½	8	226.8
1	16	453.6
1.5	24	680.4
2	32	907.2
5	80	2268
10	160	4536

Pounds(lb)

Ounces(oz)

Frequently Asked Questions

How many ounces are in a pound?: There are exactly 16 ounces in one pound, as defined by NIST HB 44.
How do I convert 1.5 pounds to ounces?: Multiply 1.5 by 16 to get 24 ounces.
How many pounds is 48 ounces?: 48 ounces equals 3 pounds (48 ÷ 16 = 3).
Why are cooking weights in ounces instead of grams?: US recipes traditionally use the avoirdupois system of pounds and ounces. Many modern recipes also include grams for precision, since 1 gram is a finer measurement than 1 ounce.
What is the difference between a fluid ounce and a weight ounce?: A fluid ounce measures volume (≈29.574 mL); a weight ounce measures mass (28.35 g). They are not interchangeable — water happens to be close, but other ingredients differ significantly.