How many pounds are in a cup?

It depends entirely on the ingredient, because a cup is a fixed volume (250 mL for a NZ metric cup) but the weight of that volume changes with density. A cup of water weighs about 0.551 lb (250 g). A cup of plain flour weighs about 0.276 lb (125 g), while a cup of white sugar weighs about 0.485 lb (220 g). There is no single conversion between cups and pounds without knowing what you are measuring.

How do you convert cups to pounds?

First find the reference weight in grams for one cup of your ingredient (this varies by ingredient density). Multiply that by the number of cups to get the total grams, then divide by 453.592 to convert grams to pounds. The formula is: Pounds = (Cups x grams per cup) / 453.592. For example, 2 cups of plain flour: 2 x 125 g = 250 g, and 250 / 453.592 = 0.551 lb.

Is a US cup the same weight in pounds as a NZ cup?

No. A NZ/Australian metric cup is 250 mL while a US customary cup is approximately 236.6 mL (often rounded to 240 mL). Since a US cup holds about 5 to 6 percent less volume, the same ingredient measured in a US cup weighs slightly less in pounds than when measured in a NZ metric cup. This converter lets you choose the correct cup size for accurate results.

Cups to Pounds Converter

This calculator converts cups to pounds for common baking and cooking ingredients, so you know the actual weight behind a volume measurement when a recipe lists cups but you need the equivalent in pounds. Because a cup is a fixed volume while the weight it holds depends entirely on density, you start by choosing your ingredient from a list of baking staples, including plain, self-raising and wholemeal flour, several types of sugar, butter, milk, water, honey, oils, rice, rolled oats, cocoa powder and salt, or enter a custom weight in grams per cup for anything not listed. Next you choose your cup size, either the NZ and Australian metric cup (250 mL) or a US cup (240 mL or 236.6 mL), and enter how many cups you are measuring. The calculator instantly returns the equivalent weight in pounds, ounces, grams and kilograms, plus a breakdown showing the reference weight used, the scale factor applied for your chosen cup size, and a quick-reference table of common cup amounts for the same ingredient. It also shows the underlying calculation step by step. Use it when converting a US recipe to weight, checking how much a bag of flour or sugar will weigh, or when you want more consistent baking results than cup measurements alone can give. For genuine precision, weighing ingredients on kitchen scales is always more reliable than converting from cups.

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Reference weights verified 2025 Based on standard NZ/AU metric cup (250 mL) and US cup (240 mL) measurements. Ingredient densities sourced from USDA National Nutrient Database and NZ Food Composition Data. 1 lb = 453.592 g.

1. Ingredient and Cups

Ingredient

Grams per NZ metric cup (250 mL cup)

g/cup

Number of cups

cups

2. Cup Size

Cup size

Reference weight for ingredient (g per 250 mL cup)

g/cup

Conversion Result

Pounds
0.28
lb (avoirdupois)

Ounces

4.41

oz (16 oz = 1 lb)

Grams

125

g (metric)

Kilograms

0.125

kg (metric)

Quick Reference: Common Cup Amounts for This Ingredient

Cups	Pounds	Ounces	Grams

Conversion Breakdown

IngredientFlour, plain / all-purpose

Cups entered1 cup

Cup size used250 mL (NZ metric)

Reference weight (250 mL cup)125 g

Scale factor for cup size1.000

Result in pounds0.276 lb

How This is Calculated

FormulaPounds = (Cups x g-per-cup) / 453.592

g-per-cup (selected size)125 g

Total grams125 g

Calculation125 / 453.592 = 0.276 lb

1 pound453.592 g

1 pound16 ounces

Result: 1 cup of plain flour equals 0.28 lb (NZ metric 250 mL cup).

How to Convert Cups to Pounds

To convert cups to pounds you first need the reference weight in grams for one cup of your ingredient, since cups measure volume and pounds measure weight. Multiply the number of cups by the grams-per-cup figure for that ingredient, then divide by 453.592 (the number of grams in a pound) to get pounds.

The formula is: Pounds = (Cups x Grams per cup) / 453.592

For example, 1 NZ metric cup of plain flour weighs 125 g, so 1 cup of flour equals 125 / 453.592 = 0.276 lb. By contrast, 1 NZ metric cup of white sugar weighs 220 g, so 1 cup of sugar equals 220 / 453.592 = 0.485 lb, nearly twice as much.

Worked Example

Convert 1 cup of plain flour (NZ metric 250 mL cup) to pounds:

Reference weight for plain flour: 125 g per NZ metric cup
Total grams = 1 cup x 125 g = 125 g
Pounds = 125 g / 453.592 = 0.276 lb
In ounces: 0.276 lb x 16 oz/lb = 4.41 oz

This matches the calculator's default output above.

Cup Sizes: NZ vs US

New Zealand recipes follow the Australian metric standard where 1 cup equals 250 mL. US recipes use a US customary cup of approximately 236.6 mL (sometimes rounded to 240 mL). Because a US cup holds slightly less volume, the same ingredient measured by US cups weighs marginally less in pounds than when measured by NZ metric cups. If you are following a US recipe on a NZ site, or vice versa, select the correct cup size in this converter.

Reference Weights for Common Ingredients

Ingredient	g per NZ metric cup (250 mL)	lb per NZ metric cup	Notes
Flour, plain / all-purpose	125 g	0.276 lb	Spooned and levelled, not packed
Flour, self-raising	125 g	0.276 lb	Same method as plain flour
Flour, wholemeal	130 g	0.287 lb	Slightly denser than plain
Flour, bread (strong)	130 g	0.287 lb	Higher protein, slightly heavier
Flour, almond	96 g	0.212 lb	Blanched almond meal
Sugar, white granulated	220 g	0.485 lb	Level cup
Sugar, caster (superfine)	220 g	0.485 lb	Finer grain, similar weight
Sugar, icing (sifted)	120 g	0.265 lb	Sifted before measuring
Sugar, brown (packed)	200 g	0.441 lb	Firmly packed
Sugar, raw (demerara)	220 g	0.485 lb	Level cup
Butter	225 g	0.496 lb	Softened, packed
Milk (whole)	250 g	0.551 lb	Density approx. 1 g/mL
Water	250 g	0.551 lb	Pure water at room temperature
Honey	340 g	0.750 lb	Dense liquid (density ~1.36 g/mL)
Oil, vegetable	216 g	0.476 lb	Density ~0.865 g/mL
Oil, olive	216 g	0.476 lb	Density ~0.865 g/mL
Rice, raw	185 g	0.408 lb	Short or long grain, uncooked
Rolled oats	90 g	0.198 lb	Light and airy
Cocoa powder	100 g	0.220 lb	Spooned, not packed
Baking powder	230 g	0.507 lb	Level cup. Recipes usually use teaspoons, not cups
Salt (table)	290 g	0.639 lb	Fine table salt
Desiccated coconut	85 g	0.187 lb	Finely shredded, unsweetened
Cornflour (cornstarch)	120 g	0.265 lb	Sifted
Peanut butter	260 g	0.573 lb	Smooth, packed
Yoghurt (plain)	250 g	0.551 lb	Full-fat, similar to water
Sour cream	240 g	0.529 lb	Thick, full-fat
Cream cheese	230 g	0.507 lb	Full-fat block style

Values are reference averages. Actual weights vary by brand, how the ingredient is prepared (sifted vs unsifted, packed vs spooned), and measurement technique. For precise baking always use kitchen scales.

Tips for Accurate Baking Measurements

Weigh in grams or pounds where possible. Kitchen scales cost less than $20 and remove all ambiguity from cup measurements.
For dry ingredients such as flour, spoon the ingredient into the cup and level it off with a straight edge rather than scooping directly from the bag, which can pack in up to 20 percent more.
For liquids, use a clear measuring jug at eye level to check the meniscus accurately.
Packed vs unpacked matters for brown sugar: most recipes expect firmly packed, which is the value used in this converter.
US recipes typically list weight in ounces or cups rather than pounds. Multiply by 16 to convert this calculator's pound result to ounces if needed.

Related Calculators

Essential Calculators hub: all converters and general-purpose tools.
Grams to Cups Converter: convert the other direction, grams to cups.
Cups to Ounces Converter: cups to fluid ounces and weight ounces.
Pounds to Grams Converter: quick lb to grams conversion.
Grams to Ounces Calculator: grams to weight ounces.

Method: Cups to pounds conversion is calculated as: Pounds = (Cups x reference grams per 250 mL cup x (selected cup mL / 250)) / 453.592. Reference ingredient weights are sourced from the USDA FoodData Central database, the New Zealand Food Composition Database (Plant and Food Research), and standard NZ/AU baking references. 1 pound = 453.592 grams = 16 ounces.

Reference weights are averages and will vary depending on how the ingredient is measured, the brand, and moisture content. For baking where precision matters, weighing ingredients is always recommended over cup measurements.