Cups to Pounds Calculator — Convert Volume to Weight by Ingredient
Convert cups to pounds (and grams, ounces, kilograms) for common kitchen ingredients. Because weight depends on density, a cup of honey is much heavier than a cup of flour — select your ingredient for accurate results.
cup
Ingredient
Weight depends on ingredient density — cups measure volume, not mass
- 1
Ingredient density
125 g / cupDensity used for Flour (all-purpose): 125 grams per US cup. - 2
Total grams
2 × 125 = 250 g - 3
Pounds
250 ÷ 453.592 = 0.5512
How does this calculator work?
Multiply cups by the ingredient density in g/cup, then divide by 453.592 to get pounds. Density varies: water ≈ 236.6 g/cup (0.521 lb), all-purpose flour ≈ 125 g/cup (0.276 lb), granulated sugar ≈ 200 g/cup (0.441 lb), butter ≈ 227 g/cup (0.500 lb), honey ≈ 340 g/cup (0.750 lb). For baking precision, always measure by weight in grams.
Formula
How this is calculated
Volume and weight are not directly interchangeable — the conversion depends on the density of the substance being measured. One US cup occupies approximately 236.6 mL of space, but how much that space weighs varies widely: a cup of water weighs about 236.6 g (0.521 lb), while a cup of all-purpose flour weighs only about 125 g (0.276 lb) because flour is a loose powder with air trapped between particles, and a cup of honey weighs about 340 g (0.750 lb) because honey is denser than water.
The calculator multiplies the number of cups by the selected ingredient's density in grams per cup, then converts to pounds using the exact factor 1 lb = 453.592 g. The density values are standard approximate reference values from culinary and food science sources including USDA data and ingredient packaging. Actual density can vary with brand, temperature, how tightly a dry ingredient is packed, and humidity — for baking precision, weighing in grams is more repeatable than measuring by cup.
The bar chart compares the ingredient's density against water (236.6 g/cup). Ingredients lighter than water (flour, oats, cocoa) show a shorter first segment with a grey remainder; denser ingredients (honey, maple syrup, salt) show the water reference first with an extra coloured segment illustrating the additional density.
Frequently asked questions
Flour is a powder: individual starch particles are denser than water, but air fills the gaps between them. One US cup of sifted all-purpose flour weighs about 125 g — roughly half the 236.6 g of water in the same volume. Scooped flour can weigh up to 150 g per cup, depending on how tightly it is packed.
One US cup of granulated white sugar weighs about 200 g, which is approximately 0.441 lb (about 7.1 oz). Brown sugar packed firmly into the cup weighs about 220 g (≈ 0.485 lb) because it compacts more tightly.
Yes, for liquids it works well as long as the density is close to a listed option. Oils, milk and syrups have known densities built into the list. For unusual liquids, look up the density in g/mL and multiply by 236.6 to approximate grams per cup, then choose the closest listed ingredient.
TG we-Calculate Editorial Team. (2026). Cups to Pounds Calculator — Convert Volume to Weight by Ingredient [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/cups-to-pounds-calculator
TG we-Calculate Editorial Team. "Cups to Pounds Calculator — Convert Volume to Weight by Ingredient." TG we-Calculate. 2026. https://we-calculate.com/calculator/cups-to-pounds-calculator.
TG we-Calculate Editorial Team, "Cups to Pounds Calculator — Convert Volume to Weight by Ingredient," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/cups-to-pounds-calculator
@misc{wecalculate_cups_to_pounds_calculator, title = {Cups to Pounds Calculator — Convert Volume to Weight by Ingredient}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/cups-to-pounds-calculator}}, year = {2026}, note = {TG we-Calculate} }
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