Exact vegetable oil conversion
1/3 cup oil to butter
1/3 cup of vegetable oil needs 90.8 g of butter for an exact fat match. The scale-friendly result comes from matching the fat, not simply multiplying the volume.
Oil to butter converter
90.8 g
- ⅜ cup
- 6½ tbsp
- ¾ stick
- Butter is about 80% fat, so you need more of it by weight to carry the same fat as oil.
- About 80% fat, 16-17% water and milk solids. The water is why butter and oil are not a straight swap.
Show the maths
| Formula | 72.67 g × 1 fat ÷ 0.8 fat = 90.83 g |
|---|---|
| Source | 72.67 g · 72.67 g fat |
| Result | 90.83 g · 72.67 g fat |
| Ratio | ×1.25 |
The calculation
How much butter for 1/3 cup of oil?
1/3 cup of vegetable oil weighs 72.67 g. Oil is essentially pure fat, while standard butter is approximately 80% fat, so the oil weight is divided by 0.80.
The familiar quick rule is useful for everyday baking, but the exact result above is the better choice when structure and consistency matter.
Equivalent butter measures
90.8 g butter in other units
Quick answers
Questions about this conversion
How much butter replaces 1/3 cup of oil?
1/3 cup of vegetable oil needs 90.8 g of butter for an exact fat match. In standard butter sticks, this equals approximately 90.8 g of butter.
How much melted butter equals 1/3 cup of vegetable oil?
When replacing 1/3 cup of vegetable oil with melted butter, use 90.8 grams (90.8 g). Because butter solidifies as it cools, melt it gently and let it cool slightly before combining with eggs or sugar.
How many sticks of butter is 1/3 cup of oil?
In US butter sticks (where 1 stick = 1/2 cup = 113.4g), 1/3 cup of vegetable oil equals approximately 90.8 g of butter. Weighing 90.8 g on a kitchen scale gives the exact fat match.
Can I use softened butter instead of melted butter for 1/3 cup?
When a recipe specifies 1/3 cup of liquid oil, melted and slightly cooled butter is recommended. Softened butter changes the aeration mechanics if creamed with sugar, which can alter the intended crumb density.
How does replacing 1/3 cup of oil affect browning and moisture?
Butter brings roughly 16% water and milk solids into the batter. Expect a richer golden crust due to lactose browning, with a tender crumb that firms slightly as the butterfat cools to room temperature.