Cups to Pounds Converter
Cups measure volume and pounds measure weight, so the ingredient decides the answer: 2 cups of flour weigh about 0.53 lb, but 2 cups of butter are a full pound.
Example: with Volume (US cups) 2 · Ingredient All-purpose flour (120 g/cup) · Custom grams per cup 120 → Weight: 0.53 lb.
Computed by the calculator below using its default values. Change any input to see your own numbers.
⚖️ Weigh ingredients with a kitchen scale
Check it outHow many cups in a pound?
Turn the conversion around and the pattern is easy to remember: 1 lb of all-purpose flour ≈ 3.78 cups (call it 3¾), 1 lb of granulated sugar ≈ 2.27 cups, 1 lb of butter is exactly 2 cups, and 1 lb of water is 1.92 cups. Dense ingredients pack more weight into each cup, so they need fewer cups per pound.
Going cups → pounds, multiply cups by the grams-per-cup and divide by 453.59: 4 cups of flour are 480 g ≈ 1.06 lb — so a 5-lb bag of flour holds close to 19 cups. The old rhyme “a pint’s a pound the world around” only works for water-like liquids: a pint (2 cups) of water weighs 1.04 lb, but a pint of flour is barely half a pound. For “1 lb to cups dry” questions, always name the ingredient first — dry is not one density.
How it’s calculated
Weight (lb) = cups × grams-per-cup ÷ 453.59237, the exact gram definition of the pound (NIST). Grams-per-cup values follow King Arthur Baking and USDA references: all-purpose flour 120 g, granulated sugar 200 g, packed brown sugar 220 g, butter 227 g, water 236.588 g (1 cup = 236.588 mL at 1 g/mL), whole milk 245 g, honey 339 g, uncooked white rice 185 g. The ounce row divides grams by 28.349523125 (weight ounces, not fluid ounces).
Results update as you type and are estimates, not professional advice — verify important decisions with a qualified professional.
Common mistakes
- Assuming 2 cups always make a pound — that’s true for butter (227 g/cup) but 2 cups of flour weigh only about 0.53 lb.
- Reading the ounce row as fluid ounces: these are weight ounces (28.35 g each), not the 8-fl-oz-per-cup volume kind.
- Packing or sifting changes real density — scooped flour can run 25% heavier than the 120 g/cup standard.
Frequently asked questions
How many cups are in a pound?
Depends on density: about 3.78 cups of all-purpose flour, 2.27 cups of granulated sugar, exactly 2 cups of butter, or 1.92 cups of water per pound.
How many pounds is 4 cups of flour?
4 × 120 g = 480 g, which is 480 ÷ 453.59 ≈ 1.06 lb — just over a pound.
How many cups is 1 lb dry?
There is no single dry conversion. Weigh-by-volume varies: 1 lb is roughly 3.78 cups of flour, 2.45 cups of uncooked rice, or about 4 cups of powdered sugar (113 g/cup).
Is a pint a pound?
Approximately, and only for water-like liquids: a US pint of water weighs 1.04 lb. For milk it's 1.08 lb, and for flour just over half a pound.