US butter packaging context
In a US recipe, ½ cup is commonly one standard stick and eight tablespoons. The King Arthur chart gives that amount as 4 ounces or 113 grams.
Mass ounces (oz) are not fluid ounces (fl oz). This page's 4 oz is a weight reference for butter, not a liquid-volume conversion.
Why some sources say 115 g
KitchenAid Canada and Dairy Farmers of Canada list ½ cup as 115 g in their regional butter charts, while King Arthur and Allrecipes use 113 g. The difference reflects chart and packaging conventions plus rounding; it is not a reason to mix regional cup systems silently.
If the recipe or wrapper gives a weight, follow that stated convention. A scale is the most repeatable choice for pastry and bread formulas.
Measuring butter accurately
Use wrapper markings when available, weigh the butter, or press softened butter into a dry cup and level it. Cold pieces and melted butter are handled differently, so follow the recipe's stated state instead of treating them as identical volume measures.
Questions readers ask
Is half a cup one stick of butter?
For a standard US butter stick, yes: ½ cup is 8 tablespoons and about 113 g.
Can I use 115 g instead of 113 g?
For many everyday recipes the difference is small, but follow the recipe's regional convention and weigh the exact amount when precision matters.
How many tablespoons are in half a cup of butter?
The US-style reference is 8 tablespoons.
Is 4 oz butter the same as 4 fluid ounces?
No. Four ounces here means mass. Fluid ounces measure volume and should not be substituted without the recipe's convention.
Sources and method
Numerical answers are tied to the stated ingredient, state, cup convention, and source. Derived values are calculated from the cited reference and rounded for kitchen use.