The conversions
| Sticks | Volume | Weight |
|---|---|---|
| ½ | ¼ cup (4 tbsp) | 2 oz, about 57 g |
| 1 | ½ cup (8 tbsp) | 4 oz, about 113 g |
| 2 | 1 cup (16 tbsp) | 8 oz, about 227 g |
| 4 | 2 cups (32 tbsp) | 1 lb, about 454 g |
USDA lists one tablespoon of butter as about 14 g, so 8 tablespoons come to the same 113 g as a stick.
European and other recipes
Butter outside the US is often sold in 250 g blocks, about 2.2 sticks (250 ÷ 113). When a recipe gives grams, weigh the butter. When it gives “1 cup butter”, that’s 2 US sticks.
See tablespoon and teaspoon and fluid ounce and ounce for the units.