How Many Tbsp Of Butter In a Cup? | 16 Per US Cup

One standard US cup of butter contains exactly 16 tablespoons (tbsp), a fixed volume conversion that applies to butter and all other dry and liquid ingredients in US customary cooking.

Every US cup equals 16 tablespoons. Period. Whether you’re measuring butter, flour, or water, that ratio never changes — though butter’s stick packaging makes it easier than most. This article covers the exact conversion, how stick markings help, the most common measuring mistakes, and what changes if your recipe uses metric units.

The Short Conversion: 1 Cup Butter = 16 Tbsp

The conversion is a volume constant, not a weight estimate. One US cup equals 16 US tablespoons, each tablespoon measuring about 14.8 mL[1][2]. This ratio comes from the US customary system and applies to every ingredient by volume, including butter sticks[1][3].

For reference, here is the basic chart for butter from tablespoons up through a full cup:

How Butter Sticks Make the Conversion Easier

Commercial butter in the US is sold in standardized sticks, each stick weighing 4 ounces (about 113 grams) and measuring exactly ½ cup by volume[1][3].

The wrapper acts as a built-in measuring tool. Every stick is printed with tablespoon increments — numbered lines at the 1, 2, 3, 4, 5, 6, 7, and 8 tablespoon marks. Cut a stick at the line that matches your recipe. Two sticks side by side equal the full 16 tablespoons for 1 cup[1][3].

The One Common Measuring Mistake With Half-Cups

The most frequent error home cooks make is assuming half a cup of butter equals 10 or 12 tablespoons. The correct value is 8 tablespoons — exactly half of 16[1][3][5]. The stick’s own wrapper lines make this error easy to avoid: the 8-tablespoon mark sits at the stick’s center.

When the Ratio Changes: Metric and International Differences

The 1-cup-equals-16-tablespoons rule is strictly a US customary standard. If your recipe uses metric cups or non-US tablespoons, the numbers shift slightly:

If a recipe calls for “metric cups” (common in European and Australian cookbooks), the 1:16 ratio is slightly off. A 250 mL cup divided by a 15 mL metric tablespoon yields about 16.7 tablespoons — close enough for most baking, but worth noting for finicky pastries[2][7].

The bigger risk is Australian tablespoons, which measure 20 mL each. Using an Australian tablespoon in a US recipe adds roughly 35% more butter per spoon. Stick with the unit system the recipe was written in[2][7].

How to Convert Butter Between Cups and Tablespoons

To convert cups to tablespoons: Multiply the cup amount by 16[1][3][6]. For ½ cup: 0.5 × 16 = 8 tablespoons. For ¾ cup: 0.75 × 16 = 12 tablespoons.

To convert tablespoons to cups: Divide the tablespoon amount by 16[1][3][6]. For 8 tablespoons: 8 ÷ 16 = ½ cup. For 16 tablespoons: 16 ÷ 16 = 1 cup.

Applying the Conversion: Your Butter Measurement Checklist

When you reach for the butter for your next bake, this quick sequence covers it:

• Check the unit system — is your recipe US customary or metric? The USDA’s official measurement conversion tables confirm the US standard.
• Read the stick wrapper — the printed tablespoon lines are exact; use them instead of guessing.
• When scaling recipes, the formula is always cups × 16 for tablespoons, or tablespoons ÷ 16 for cups.
• Melted butter loses air volume but not equivalent fluid volume — 1 cup of melted butter still equals 16 tablespoons for the recipe’s fat content[1].
• Whipped butter has a different density but the same volume measurement; use standard sticks for precision.