Pounds to Cups Calculator — lb to Cups for Baking Ingredients
Select an ingredient, enter its weight in pounds, and instantly see how many US cups that is — plus tablespoons and teaspoons. Covers flour, sugar, butter, water, milk, honey and 12 more common baking ingredients.
lb
Ingredient
Volume depends on ingredient density — select the correct ingredient above
- 1
Weight in grams
1 × 453.592 = 453.59 - 2
US cups
453.59 ÷ 125 = 3.629Density: 125 g per cup (All-purpose flour).
How does this calculator work?
Cups = (lb × 453.59) ÷ grams-per-cup. 1 lb all-purpose flour ≈ 3.63 cups; 1 lb granulated sugar ≈ 2.27 cups; 1 lb butter = 2 cups exactly; 1 lb water ≈ 1.91 cups. Select the ingredient above — density varies widely and picking the wrong one gives a wrong answer.
Formula
How this is calculated
Converting pounds to cups requires knowing the density of your ingredient, because a cup of flour weighs very differently from a cup of honey. The calculation has two steps: first convert pounds to grams (1 lb = 453.59237 g exactly, the international avoirdupois definition), then divide by the ingredient's cup weight. The cup weights in this calculator are based on USDA FoodData Central data and standard culinary references: for example, 1 cup of all-purpose flour is typically 125 g when measured by the spoon-and-level method.
Sifted vs unsifted flour can shift the cup weight by up to 15–20 g, and spooned-and-levelled flour weighs less than flour scooped directly from the bag (the "scoop" method compacts it). Brown sugar is listed as packed (220 g/cup) because most recipes specify this. Water uses 237 g (the exact US fluid-cup volume of 236.588 mL, treating water density as 1 g/mL at room temperature).
For cooking accuracy, weighing in grams is always more reliable than volume: a cup of flour can range from 110 g to 150 g depending on how it is scooped, whereas a gram scale is unambiguous. Use this calculator as a practical conversion guide, but consider a digital kitchen scale for best baking results.
Frequently asked questions
Using the standard spoon-and-level method (125 g per cup), 1 lb = 453.59 g ÷ 125 g = approximately 3.63 cups. If you scoop flour directly from the bag it can compact to 150 g per cup, giving about 3.02 cups — a significant difference for baking.
Butter is 227 g per cup (2 sticks = 1 cup = 0.5 lb in US packaging). So 1 lb of butter = 2 cups exactly. This is one of the most reliable volume-to-weight conversions in cooking because butter density is very consistent.
A US cup is a fixed volume (≈ 237 mL), but different ingredients have different densities. Honey is much denser than flour, so a pound of honey is fewer cups than a pound of flour. Always select the correct ingredient to get an accurate result.
Also known as
TG we-Calculate Editorial Team. (2026). Pounds to Cups Calculator — lb to Cups for Baking Ingredients [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/pounds-to-cups-calculator
TG we-Calculate Editorial Team. "Pounds to Cups Calculator — lb to Cups for Baking Ingredients." TG we-Calculate. 2026. https://we-calculate.com/calculator/pounds-to-cups-calculator.
TG we-Calculate Editorial Team, "Pounds to Cups Calculator — lb to Cups for Baking Ingredients," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/pounds-to-cups-calculator
@misc{wecalculate_pounds_to_cups_calculator, title = {Pounds to Cups Calculator — lb to Cups for Baking Ingredients}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/pounds-to-cups-calculator}}, year = {2026}, note = {TG we-Calculate} }
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