Butter to Oil Converter
Free Baking Tool
Need to swap butter for oil, or oil for butter, in a recipe? This free butter to oil converter gives you the exact amount to use in seconds, based on baking-tested conversion ratios — so your texture and moisture stay right where they should be.
Butter to Oil Converter
Convert between butter and oil for any recipe
Ratio: 1 cup butter = 3/4 cup oil, based on standard baking conversion references.
Professional baker and food blogger with 3+ years of baking experience. Conversion ratios tested in home baking recipes.
Butter to Oil Conversion Chart
| Butter | Oil Equivalent |
|---|---|
| 1 tbsp | 2¼ tsp |
| 2 tbsp | 1½ tbsp |
| 1/4 cup | 3 tbsp |
| 1/2 cup | 6 tbsp (3/8 cup) |
| 3/4 cup | 9 tbsp (0.56 cup) |
| 1 cup | 3/4 cup |
How to Convert Butter to Oil
Butter is only about 80-82% fat (the rest is water and milk solids), while oil is 100% fat. That’s why you need less oil than butter to get the same richness — using a 1:1 swap will make baked goods greasy and overly moist.
Formula: Oil needed = Butter amount x 0.75
Example: A recipe calls for 1 cup of butter. 1 cup x 0.75 = 3/4 cup of oil.
Reverse formula: Butter needed = Oil amount / 0.75 (or Oil amount x 1.33)
When Should You Avoid This Swap?
This conversion works well for quick breads, muffins, brownies, and most cakes. It’s not recommended for recipes where butter is creamed with sugar (like classic cookies or layer cakes), since oil can’t trap air the way solid butter does — this affects rise and texture significantly.
Best Oils for Baking Substitutions
Neutral oils work best so they don’t compete with the recipe’s flavor: vegetable oil, canola oil, and light olive oil are all good choices. Coconut oil (melted) can also work, but it solidifies at room temperature, which changes texture slightly once the baked good cools.
Substitution Tips
| Use Melted Butter as a Middle Ground If you’re unsure, using melted butter instead of oil keeps more of the original flavor while still working in recipes that call for oil. | Watch Baking Time Oil-based bakes can brown slightly faster — start checking for doneness a few minutes early. | |
| Don’t Swap in Creamed-Butter Recipes Skip this substitution for recipes that specifically call for creaming butter and sugar together — the structure depends on it. | Add a Pinch of Salt Oil has no salt like some butters do — add a small pinch if your recipe relied on salted butter. | |
Frequently Asked Questions
How much oil do I use instead of 1 cup of butter?
Use 3/4 cup of oil to replace 1 cup of butter. This accounts for butter being about 80% fat while oil is 100% fat.
Can I substitute oil for butter in any recipe?
Not always. It works well in quick breads, muffins, brownies, and many cakes, but is not recommended for recipes that cream butter and sugar together, like classic cookies or layer cakes, since oil can’t trap air the same way.
What is the ratio of butter to oil?
The standard ratio is 1 cup butter to 3/4 cup oil, or a multiplier of 0.75. To go the other direction, multiply the oil amount by 1.33 to find the butter equivalent.
What’s the best oil to substitute for butter?
Neutral oils like vegetable oil, canola oil, or light olive oil work best since they don’t add competing flavor. Melted coconut oil is another option, though it resolidifies at room temperature.
Does using oil instead of butter change the taste?
Slightly. Butter has a richer, more distinct flavor from milk solids, while oil is more neutral. The difference is usually subtle in recipes with strong flavors like chocolate or spice, but more noticeable in simple butter-forward bakes like pound cake.
Can I use melted butter instead of oil?
Yes, melted butter can generally replace oil in a 1:1 ratio in recipes like muffins and quick breads, and gives a richer flavor than a neutral oil would.
Why is my cake greasy after substituting oil for butter?
This usually happens from using too much oil — remember oil replaces only 75% of the butter amount, not a full 1:1 swap. Using the full butter amount in oil adds too much fat and moisture, resulting in a greasy texture.
Sources & References
Conversion ratios based on standard culinary references including USDA FoodData Central fat-content data and established baking conversion standards.