Two-Thirds Cup of Unsalted Butter in Grams
2/3 cup of unsalted butter weighs 151.33g (5.34 oz, 160ml) according to USDA FoodData Central (1 cup unsalted butter = 227g, spooned and leveled method). 2/3 cup = 0.6667 of a full cup (240ml). See the full conversion table below for all amounts from 1 tablespoon to 3 cups.
Unsalted Butter Cup-to-Gram Conversion Table
Full range from 1 tablespoon to 3 cups. The highlighted row shows 2/3 cup.
| Amount | Grams |
|---|---|
| 1 tbsp | 14.19g |
| 2 tbsp | 28.38g |
| 1/8 cup | 28.38g |
| 1/4 cup | 56.75g |
| 1/3 cup | 75.67g |
| 1/2 cup | 113.5g |
| 2/3 cupthis page | 151.33g |
| 3/4 cup | 170.25g |
| 1 cup | 227g |
| 1 1/4 cups | 283.75g |
| 1 1/2 cups | 340.5g |
| 1 3/4 cups | 397.25g |
| 2 cups | 454g |
| 2 1/2 cups | 567.5g |
| 3 cups | 681g |
Source: USDA FoodData Central (FDC ID: 1001). 1 US cup = 240ml. Values use spooned-and-leveled method.
2/3 Cup of Different Ingredients — Weight Comparison
2/3 cup of different ingredients varies widely in weight because each has a different density. This matters when substituting ingredients in recipes.
| Ingredient | 2/3 Cup (g) |
|---|---|
| Ghee (Clarified Butter) | 145.33g |
| Unsalted Buttercurrent | 151.33g |
| Salted Butter | 151.33g |
All values use USDA FoodData Central spooned-and-leveled method. Click any ingredient to see its full conversion table.
Measuring Unsalted Butter Accurately
Why weight matters: 2/3 cup of unsalted butter can weigh anywhere from 129g to 182g depending on how you measure it. The USDA standard is 151.33g (spooned and leveled). Scooping directly from the container can add 10–20% extra weight, which affects recipe results — especially in baking.
About unsalted butter density: Butter is nearly as dense as water when melted (0.946 g/ml). 1 cup solid butter = 227g = 2 sticks US. Softened butter and solid butter weigh the same per cup — measuring by weight is most reliable. Melted butter = slightly less by volume.
About 2/3 Cup as a Measurement
2/3 cup = 10 tablespoons + 2 teaspoons = 160ml. This measure appears when scaling up 1/3 cup recipes by doubling. Use two 1/3-cup measures for accuracy, as 2/3 cup sets are less common.
Two-thirds cup is often seen in oatmeal cookie recipes, breakfast grain bowls, and rice cooker recipes for 2 servings. It equals exactly 160ml or approximately 5.4 fluid ounces.
Frequently Asked Questions
How many grams is 2/3 cup of unsalted butter?
2/3 cup of unsalted butter weighs 151.33 grams (5.34 oz, 160ml). Based on USDA FoodData Central: 1 cup unsalted butter = 227g, so 2/3 cup = 227 × 0.667 = 151.33g.
Is 2/3 cup of unsalted butter the same weight every time?
The weight can vary slightly depending on measuring technique. Spooned and leveled gives 151.33g. Scooped (packed) can be 10–20% heavier. Sifted gives a lighter weight. The USDA standard (spooned and leveled) of 151.33g is the most reliable baseline for recipes.
How do I accurately measure 2/3 cup of unsalted butter?
For accuracy, use a kitchen scale and weigh 151.33g of unsalted butter. If using measuring cups, spoon the unsalted butter lightly into a 2/3 Cup measuring cup and level off the top with a straight edge. Avoid scooping directly from the container, which compacts the ingredient and adds extra weight.
How does 2/3 cup of unsalted butter compare to other ingredients?
2/3 cup of different ingredients varies significantly: Ghee (Clarified Butter) = 145.33g, Unsalted Butter = 151.33g, Salted Butter = 151.33g. This is because each ingredient has a different density.