Cups to Grams Butter Converter
Convert cups of butter to grams, or grams to cups, using a stated ingredient preparation and approximate portion weight with US or 250 mL metric cups.
Convert recipe cups of ordinary butter to grams, or estimate cups from a weighed amount. The reference follows the US package convention that one cup equals two full quarter-pound sticks, or half a pound. It is intended for ordinary solid butter and does not model the bulk volume of whipped butter or spreads.
How to use this tool
- Choose cups to grams or grams to cups.
- Enter the corresponding quantity.
- Check that the ingredient is ordinary butter under the stated package convention.
- Select US customary or metric cups and inspect the conversion basis.
Formula
US cup reference = 0.5 × 453.59237 = 226.796185 g; selected-cup grams = reference × selected cup mL / 236.5882365
The pound-to-gram conversion is exact. The relationship between a recipe cup and packaged butter is a cooking convention, not a laboratory density measurement. A 250 mL metric cup is estimated by scaling that reference volume at the same assumed density.
Example
0.5 US customary cup corresponds to one full quarter-pound stick: 0.5 × 226.796185 = 113.3980925 g, commonly rounded to about 113 g. A full US cup corresponds to 226.796185 g, commonly rounded to 227 g.
Frequently asked questions
Why do packages and charts say 113 g or 227 g?
Those are convenient rounded cooking quantities. The calculation retains the defined pound conversion before rounding the display. Normal product and measuring variation is larger than the many mathematical decimal places.
Does this apply to whipped butter or margarine?
No. Added air, water or other ingredients change how much mass occupies a volume. Use the actual product label or weigh it instead of applying the solid-butter reference.
Can I measure melted butter the same way?
This model does not account for temperature, changes in volume, evaporation or separated milk solids. For a recipe specified in grams, weighing the required butter before melting avoids treating a density estimate as exact.
Is a metric cup the same as two US sticks?
No. The two-stick convention belongs to the US recipe cup. This calculator treats a metric cup as 250 mL and reports a larger estimated mass. Follow a recipe’s explicit weight when one is supplied.
Sources
Last updated: 2026-10-30