Weight-to-weight and volume-to-volume conversions are exact. Cups-to-grams conversions are approximate and depend on the ingredient.
1 lb equals
16 oz
Going the other way
1 oz equals 0.0625 lb
Quick reference
- 1 lb = 16 oz = 453.6 g
- 1 kg = 2.205 lb = 35.27 oz
- 1 cup = 8 fl oz = 16 tbsp = 48 tsp ≈ 236.6 ml
- 1 gallon = 4 quarts = 8 pints = 16 cups ≈ 3.785 L
Ounces (oz) measure weight; fluid ounces (fl oz) measure volume. They are not the same thing.
Quick answer: Weight and volume convert exactly within their own type: 1 lb is 16 oz or 453.6 g, and 1 cup is 8 fl oz or about 236.6 ml. Converting between cups and grams depends on the ingredient: a cup of all-purpose flour is about 120 g, but a cup of sugar is about 200 g.
Practical guide
How to convert grocery and cooking units correctly
- 1
Pick the amount and the unit on the package or in the recipe, such as 16 oz, 2 lb, or 1 1/2 cups.
- 2
Choose the unit you want. Weight units are ounces, pounds, grams and kilograms. Volume units are teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons, milliliters and liters.
- 3
Convert within the same type first. Weight to weight and volume to volume conversions are exact: 1 pound is 16 ounces or about 453.6 grams, and 1 cup is 8 fluid ounces or about 236.6 milliliters.
- 4
If you cross between weight and volume, pick the ingredient. A cup of flour weighs far less than a cup of sugar or honey, so the same cup converts to different grams.
- 5
Use the result to compare unit prices or scale a recipe, and round sensibly. Grams are best for baking accuracy; cups are fine for most cooking.
Worked example
Example: 1 lb of butter is 16 oz or about 454 g. One U.S. cup of butter is about 227 g, so a 1 lb package holds about 2 cups. A recipe that calls for 250 g of all-purpose flour needs about 2 cups, since a cup of flour is about 120 g.
How to read the result
Weight-to-weight and volume-to-volume results are exact. Weight-to-volume results are good planning estimates for typical ingredients, which is usually enough for cooking but can matter in precise baking.
Important limits: Cups-to-grams values are typical weights per U.S. cup and vary with brand, humidity, and whether the ingredient is scooped, sifted, or packed. Metric cups, UK pints, and Imperial gallons are different sizes from the U.S. units used here. For baking, a kitchen scale is more accurate than measuring cups.
Evergreen method
Compare usable cost, not package price
The durable comparison is price per common unit adjusted for the share you will actually use.
Formula
usable unit cost = price ÷ (quantity × usable share)Reproducible steps
- 1.Convert every option to the same unit.
- 2.Estimate the share your household will use before spoilage.
- 3.Choose the lower usable unit cost only if storage and cash flow also work.
Data note — Evergreen model: The formula works with your own inputs and does not depend on a specific price or year.
FAQ
Questions, answered
How many ounces are in a pound?
There are 16 ounces in a pound. One pound is also about 453.6 grams, and one ounce is about 28.35 grams.
How many cups are in a pound?
It depends on the ingredient, because cups measure volume and pounds measure weight. One pound of butter is about 2 cups, one pound of granulated sugar is about 2.3 cups, and one pound of all-purpose flour is about 3.8 cups.
What is the difference between ounces and fluid ounces?
An ounce (oz) measures weight, and a fluid ounce (fl oz) measures volume. They are only roughly equal for water and water-like liquids, so do not swap them for thick or dense foods like honey or flour.
How many tablespoons are in a cup?
There are 16 tablespoons in a U.S. cup, and 3 teaspoons in a tablespoon, so a cup holds 48 teaspoons.
How many grams are in a cup of flour?
A cup of all-purpose flour is typically about 120 grams, although it ranges with how you scoop it. For consistent baking, weigh flour instead of using a cup.
How does unit conversion help compare grocery prices?
Convert both packages to the same unit before dividing price by quantity. For example, convert a 32 fl oz bottle and a 1 liter bottle to milliliters, then compare the price per milliliter or use the Unit Price Calculator.
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