Butter to Oil Conversion Calculator - Precise Fat Substitution
Grams of Butter to ml of Oil Substitution Charts
Use these charts to replace a given weight of butter with the correct volume of oil—takes into account 80 % fat-substitution and oil density (0.920 g/ml).
It's designed for quick reference in recipes, so you can easily swap butter for oil without needing to do any calculations.
How to read them:
- If a recipe calls for 110 g of butter, use 96 ml of oil.
- For 250 g of butter, use 217 ml of oil.
- For 1 500 g of butter, use 1 304 ml of oil.
No manual math needed—just find your butter amount and read off the oil volume!
Butter to Oil Substitution Chart
Grams to milliliters (1 g - 100 g)
| Butter (g) | Oil (ml) |
|---|---|
| 1 g | 0.87 ml |
| 2 g | 1.74 ml |
| 3 g | 2.61 ml |
| 5 g | 4.35 ml |
| 8 g | 6.96 ml |
| 10 g | 8.70 ml |
| 15 g | 13.04 ml |
| 20 g | 17.39 ml |
| 25 g | 21.74 ml |
| 30 g | 26.09 ml |
| 35 g | 30.43 ml |
| 45 g | 39.13 ml |
| 50 g | 43.48 ml |
| 60 g | 52.17 ml |
| 90 g | 78.26 ml |
| 100 g | 86.96 ml |
Butter to Oil Substitution Chart
Grams to milliliters (110 g - 2,000 g)
| Butter (g) | Oil (ml) |
|---|---|
| 110 g | 96 ml |
| 125 g | 109 ml |
| 150 g | 130 ml |
| 175 g | 152 ml |
| 200 g | 174 ml |
| 225 g | 196 ml |
| 250 g | 217 ml |
| 275 g | 239 ml |
| 375 g | 326 ml |
| 500 g | 435 ml |
| 700 g | 609 ml |
| 750 g | 652 ml |
| 1250 g | 1087 ml |
| 1500 g | 1304 ml |
| 1750 g | 1521 ml |
| 2000 g | 1738 ml |
Ml of Oil to Grams of Butter Substitution Charts
Use this table to replace a given volume of oil with the correct weight of butter—takes into account an 80 % fat-substitution ratio and oil density (0.920 g/ml).
It's designed for quick reference in recipes, so you can easily swap oil for butter without any calculations.
How to read it:
- If you have 100 ml of oil, use 115 g of butter.
- For 150 ml of oil, use 172.5 g of butter.
- For 1 250 ml of oil, use 1 437.5 g of butter.
No manual math needed—just find your oil volume and read off the butter weight!
Butter to Oil Substitution Chart
Grams to milliliters (1 g - 100 g)
| Oil (ml) | Butter to Use (g) |
|---|---|
| 1 ml | 1.15 g |
| 2 ml | 2.30 g |
| 3 ml | 3.45 g |
| 5 ml | 5.75 g |
| 8 ml | 9.20 g |
| 10 ml | 11.50 g |
| 15 ml | 17.25 g |
| 20 ml | 23.00 g |
| 25 ml | 28.75 g |
| 30 ml | 34.50 g |
| 35 ml | 40.25 g |
| 45 ml | 51.75 g |
| 50 ml | 57.50 g |
| 60 ml | 69.00 g |
| 90 ml | 103.50 g |
| 100 ml | 115.00 g |
Butter to Oil Substitution Chart
Grams to milliliters (110 g - 2,000 g)
| Oil (ml) | Butter to Use (g) |
|---|---|
| 100 ml | 115 g |
| 110 ml | 126.5 g |
| 125 ml | 143.8 g |
| 150 ml | 172.5 g |
| 175 ml | 201.3 g |
| 200 ml | 230.0 g |
| 225 ml | 258.8 g |
| 250 ml | 287.5 g |
| 275 ml | 316.3 g |
| 375 ml | 431.3 g |
| 500 ml | 575.0 g |
| 700 ml | 805.0 g |
| 750 ml | 862.5 g |
| 1250 ml | 1437.5 g |
| 1500 ml | 1725.0 g |
Butter Sticks to Oil Substitution Chart
This table helps you quickly swap butter sticks for oil in your recipes.
How to use it:
- Find the row matching the number of butter sticks your recipe calls for (e.g. ¾ stick → ⅜ cup of butter).
- Look at the oil column to see exactly how many cups of oil to use instead, plus an easy-to-measure fraction. For instance, 2 sticks of butter → 0.79 cup oil (≈ ¾ cup).
- If your recipe uses a fractional stick—like ⅓ stick—use the matching oil volume (0.13 cup, ≈ 1/8 cup oil).
Tip: The decimals ensure precision, while the fractions help you measure with standard cups.
Note: These stick and cup conversions use a practical volume-based rule (approximately ¾ cup oil for 1 cup butter) commonly used in American cooking. For more precise density-correct conversions (using 0.92 g/ml), refer to the gram/milliliter tables above.
| Butter Sticks | Oil (cups) |
|---|---|
| ¼ stick (⅛ cup butter) | 0.10 cup (≈ 1/10 cup) |
| ⅓ stick (⅙ cup butter) | 0.13 cup (≈ 1/8 cup) |
| ½ stick (¼ cup butter) | 0.20 cup (= 1/5 cup) |
| ⅔ stick (⅓ cup butter) | 0.26 cup (≈ ¼ cup) |
| ¾ stick (⅜ cup butter) | 0.30 cup (≈ ⅜ cup) |
| 1 stick (½ cup butter) | 0.40 cup (= 2/5 cup) |
| 2 sticks (1 cup butter) | 0.79 cup (≈ ¾ cup) |
| 3 sticks (1 ½ cups butter) | 1.19 cups (≈ 1¼ cups) |
| 4 sticks (2 cups butter) | 1.58 cups (≈ 1 ½ cups) |
| 6 sticks (3 cups butter) | 2.38 cups (≈ 2 ⅓ cups) |
| 8 sticks (4 cups butter) | 3.17 cups (≈ 3 ⅙ cups) |
Oil Cups to Butter Sticks Conversion Chart
This table helps you quickly swap oil for butter sticks in your recipes. It shows:
- Oil (cups): the volume of oil to replace.
- Butter Sticks: the number of U.S. butter sticks you need (with a familiar fraction).
How to use it:
- Find the row matching the oil volume you want to substitute (e.g. ⅜ cup oil).
- Look at the Butter Sticks column to see how many sticks of butter to use instead, with an easy-to-measure fraction. For instance, ¾ cup oil → ¾ stick butter.
Tip: The decimals ensure precision, while the fractions help you measure with standard sticks.
| Oil (cups) | Butter Sticks |
|---|---|
| ¼ cup | 0.25 stick (¼ stick) |
| ⅓ cup | 0.33 stick (⅓ stick) |
| ⅜ cup | 0.75 stick (¾ stick) |
| ½ cup | 0.5 stick (½ stick) |
| ⅝ cup | 1.25 sticks (1¼ sticks) |
| ⅔ cup | 1.33 sticks (1⅓ sticks) |
| ¾ cup | 1.5 sticks (1½ sticks) |
| 1 cup | 2 sticks |
| 1.5 cups | 3 sticks |
| 2 cups | 4 sticks |
| 3 cups | 6 sticks |
| 4 cups | 8 sticks |
How Our Butter ↔ Oil Substitution Calculator Works
Welcome to the easiest way to swap butter and oil in any recipe—no more guesswork, no more messy math. Whether you're baking a cake, sautéing vegetables, or making your favorite cookies, our calculator gives you the precise amount of oil you need to replace butter (and vice versa) in seconds.
Quick Step-by-Step
- Enter the Amount
Type in the quantity you need (e.g. "200", "1/2", "2.5"). - Select Your Units
Choose grams, milliliters, cups or sticks for both your source and target. - Pick Butter or Oil
Tell us whether you're converting from butter to oil, or from oil to butter. - Click Convert
Instantly see your result—and get a quick explanation of how we did the math.
Why We Use 80 % of the Butter Mass
Butter is not 100 % fat—it's about 80 % fat and 20 % water and solids. When you replace butter with oil, you only need to match the fat content:
- Calculate butter-fat: 200 g butter × 80% = 160 g of fat
- Convert to oil-fat: oil is nearly pure fat, so you use 160 g of oil
- Adjust for density: oil weighs ~0.92 g/ml, so 160 g ÷ 0.92 = 174 ml
This "80 % rule" ensures your recipes keep the right richness and texture—no soggy muffins, no dry brownies.
Precision Meets Convenience
Many home cooks use the "¾ of the butter amount" shorthand (for 200 g, that's 150 ml oil). Our calculator provides a more precise calculation using the 80% fat content method and density correction:
- Calculated Result: 200 g butter → ~174 ml oil (compared to the ¾ rule giving 150 ml)
- Good Starting Point: reduces trial-and-error in recipe adaptation
- Universal: works with grams, ml, cups or sticks
Note: Both methods work well in practice. Use the simple ¾ rule for quick estimates, or our calculator for more precise conversions when scaling recipes.
Try it now—enter your numbers above and get your perfect butter-to-oil (or oil-to-butter) substitution in a flash.
Important Notes and Limitations
Butter Fat Content Variability: This calculator assumes butter contains 80% fat, which is typical for US butter. However, butter fat content can vary by brand and country—some European butters may contain 82-84% fat, while salted vs. unsalted butter may have slight differences in water content. For most recipes, these variations are minor.
Oil Density Approximation: We use 0.920 g/ml as the average oil density. Actual density varies by oil type:
- Vegetable/Canola oil: ~0.91-0.92 g/ml
- Olive oil: ~0.91-0.92 g/ml
- Sunflower oil: ~0.92-0.93 g/ml
- Coconut oil (liquid): ~0.92 g/ml
These small differences (±0.01-0.02 g/ml) have minimal impact on most recipes.
Best Use Cases: This substitution works best for recipes where butter is melted or the fat is dispersed throughout the batter:
- Cakes, muffins, quick breads (excellent results)
- Brownies, blondies (very good results)
- Cookies (texture may change—less crispy, more spread)
- Laminated pastry (croissants, puff pastry—not recommended)
- Creamed-butter cookies (structure depends on solid butter)
- Pie crusts, shortbread (flakiness requires solid fat)
Water Content Adjustment: Since butter contains approximately 20% water and oil contains none, substituting oil for butter reduces the total liquid in your recipe. For most quick breads and cakes, this is fine and may even produce a moister crumb. However, in drier doughs, you may want to add 1-2 tablespoons of water or milk per cup of butter being replaced.
Rule of Thumb vs. Precision: For quick estimates, many bakers use the simple "¾ cup oil for 1 cup butter" rule. Our calculator provides more precision using the 80% fat content method, which is particularly helpful when scaling recipes or working with metric measurements. Both approaches work—use what suits your cooking style.
How to Replace Butter with Olive Oil in Baking Recipes
Replacing butter with olive oil (or any cooking oil) in baking recipes is easier than you think. The key is understanding the fat content difference between butter and oil to maintain the proper texture and moisture in your baked goods.
Best Practices for Oil Substitution in Baking
- Use 80% of butter weight: For every 100g of butter called for, use about 87ml of olive oil or vegetable oil (80g of fat ÷ 0.92 density)
- Measure accurately: Use a kitchen scale for grams or a liquid measuring cup for milliliters at eye level
- Room temperature matters: Make sure oil is at room temperature before mixing into batter
- Mix gently: Over-mixing oil-based batters can lead to tough textures
- Adjust baking time: Oil-based recipes may bake slightly faster than butter-based ones
Which Oil Works Best for Baking?
Different oils can replace butter in baking, each with unique properties:
- Olive oil: Best for Mediterranean-style cakes, muffins, and bread. Extra virgin adds flavor; light olive oil is more neutral
- Vegetable oil: Neutral flavor makes it perfect for cakes, cupcakes, and brownies
- Canola oil: Light flavor and high smoke point, ideal for most baking applications
- Coconut oil: Can substitute 1:1 with butter by weight (no 80% adjustment needed since it's also solid fat)
- Avocado oil: Neutral flavor and heart-healthy properties, great for healthier baking
Butter vs Oil in Baking: What Changes?
| Aspect | With Butter | With Oil |
|---|---|---|
| Flavor | Rich, buttery taste | More neutral (depends on oil type) |
| Texture | Flaky, tender crumb | Moist, soft, slightly denser |
| Shelf Life | 2-3 days at room temp | 4-5 days (stays moist longer) |
| Health | Higher saturated fat | Lower saturated fat (depends on oil) |
| Best For | Cookies, pie crusts, pastries | Muffins, quick breads, cakes |
When NOT to Substitute Oil for Butter
Some recipes rely on butter's unique properties and won't work well with oil:
- Cookies that need to spread: Butter melts differently than oil, affecting cookie texture
- Laminated doughs: Croissants, puff pastry, and Danish pastries require solid butter layers
- Buttercream frosting: Oil-based frosting doesn't set properly
- Shortbread: Butter flavor is essential to this cookie
Frequently Asked Questions
Why can't I use equal parts of butter and oil?
Because butter is only about 80 % fat (the rest is water and solids) whereas oil is nearly 100 % fat. If you use a 1:1 swap, your recipe ends up too wet and greasy. Our calculator matches the fat content—using 80 % of the butter mass in oil—so you get the right texture every time.
Does this work for coconut oil?
Yes. Most cooking oils—including coconut oil—have very similar fat content and density. Our 80 % fat-substitution ratio and the oil-density setting (0.92 g/ml) apply equally well to coconut oil, canola, vegetable, olive, etc.
What types of oil can this tool convert to or from butter?
You can use any common cooking oil—vegetable, canola, sunflower, olive, coconut, etc.—because they all have very similar fat content and density. Our calculator treats all of these as "oil" and applies the same 80% fat-substitution ratio and 0.92 g/ml density.
How much is 100g of butter in oil?
100g of butter equals about 87ml (80g) of oil. Since butter contains approximately 80% fat and 20% water and milk solids, you need only 80% of the butter's fat (80g). Accounting for oil density (0.92 g/ml), this equals 87ml of oil. This ensures your recipe maintains the correct fat content without becoming too greasy.
What is the ratio of butter to oil?
The ratio of butter to oil is 1:0.8 (or 5:4). This means for every 100g of butter, you need 80g of oil. A good rule of thumb is to use about 3/4 (75%) of the butter amount when substituting with olive, canola, or vegetable oil. For example, if a recipe calls for 1 cup of butter, use about ¾ cup of oil.
What is 200g of butter in oil?
200g of butter converts to about 174ml (160g) of oil. Using the 80% fat conversion ratio, you multiply 200g by 0.8 to get 160g of fat content. Accounting for oil density (0.92 g/ml), this equals 174ml of oil. This conversion ensures your baked goods maintain the proper texture and moisture.
How much oil is 250g of butter?
250g of butter equals about 217ml (200g) of cooking oil. To convert, multiply 250g by 0.8 (the fat ratio) to get 200g of fat content. Since oil has a density of 0.92 g/ml, this equals 217ml of liquid oil (200g ÷ 0.92). For coconut oil, use 200g directly since it's measured by weight.
How do I convert oil to butter?
To convert oil to butter, multiply the oil amount by 1.25 (or divide by 0.8). For example, 100ml of oil equals 125g of butter. This accounts for butter's water content. When substituting oil for butter in recipes, you can generally use a 1:1 ratio for most oils including olive, vegetable, and canola oil, but the texture and flavor will differ.
Is substituting butter for oil always 1:1?
No, substituting butter for oil is NOT always 1:1 by weight. While some sources suggest a 1:1 ratio by volume for convenience, the accurate conversion is 1:0.8 by weight (butter to oil). However, in practical baking, using a 1:1 volume ratio often works because it's measured in cups, which is less precise. For best results, use 80% of the butter's weight in oil.
Quick Reference: Butter to Oil Conversion Table
Common butter to oil conversions for baking and cooking:
| Butter (grams) | Oil (ml) | Oil (grams) |
|---|---|---|
| 75g | 65ml | 60g |
| 100g | 87ml | 80g |
| 125g | 109ml | 100g |
| 150g | 130ml | 120g |
| 200g | 174ml | 160g |
| 250g | 217ml | 200g |
| 300g | 261ml | 240g |
| 400g | 348ml | 320g |
| 500g | 435ml | 400g |
Note: Conversions use the 80% fat ratio (butter to oil). Oil density is approximately 0.92 g/ml.
US Volume Measurements: Butter to Oil Quick Reference
Common US cooking measurements for butter to oil conversions. Perfect for American recipes using cups, sticks, and tablespoons:
| Butter (US Measurement) | Oil Equivalent | Best Used For |
|---|---|---|
| 1 tablespoon | 2¼ teaspoons | Small recipe adjustments |
| 2 tablespoons (¼ stick) | 1½ tablespoons | Muffins, small batches |
| ¼ cup (½ stick) | 3 tablespoons | Cookies, quick breads |
| ⅓ cup | ¼ cup | Small cakes, brownies |
| ½ cup (1 stick) | ⅓ cup + 1 tablespoon | Most common conversion |
| ⅔ cup | ½ cup | Layer cakes, large batches |
| ¾ cup (1½ sticks) | ½ cup + 1 tablespoon | Sheet cakes, brownies |
| 1 cup (2 sticks) | ¾ cup | Large recipes, pound cakes |
Pro tip: Use measuring spoons and cups at eye level for accurate results. Slight variations (±1 teaspoon) usually won't affect your recipe.
Understanding Butter Stick Measurements
In the United States, butter is typically sold in sticks with convenient measurement markings. Here's everything you need to know:
Standard Butter Stick Equivalents
- 1 stick of butter = 8 tablespoons = ½ cup = 4 ounces = 113 grams
- ½ stick of butter = 4 tablespoons = ¼ cup = 2 ounces = 57 grams
- ¼ stick of butter = 2 tablespoons = ⅛ cup = 1 ounce = 28 grams
- 2 sticks of butter = 16 tablespoons = 1 cup = 8 ounces = 227 grams
Butter Stick to Oil Conversion
When substituting oil for butter sticks, use these practical conversions:
- 1 stick butter (½ cup) → 6 tablespoons oil (90ml)
- ½ stick butter (¼ cup) → 3 tablespoons oil (45ml)
- 2 sticks butter (1 cup) → ¾ cup oil (180ml)
Reading Butter Stick Wrapper Markings
Most butter sticks have measurement lines printed on the wrapper:
- Each line typically represents 1 tablespoon
- 8 lines total per stick
- Cut through the wrapper at the marking for precise measurements
- In Europe, butter is often sold in 250g blocks (about 2.2 US sticks)
Quick Tip: If you don't have measuring cups, use the wrapper markings to measure tablespoons, then convert to oil using our calculator above!
Recipe-Specific Butter to Oil Substitution Guide
Not all recipes respond the same way to oil substitution. Here's how to get the best results for different types of baked goods:
Best Results with Oil Substitution
Chocolate Chip Cookies
Substitution: Use 80% of butter weight in vegetable oil or canola oil
Result: Chewier, softer texture. Cookies will spread slightly less and stay moist longer.
Pro tip: Chill dough for 30 minutes before baking to control spread.
Brownies & Fudgy Treats
Substitution: 1:1 ratio works perfectly (100% oil for butter)
Result: Extra moist, fudgy texture. Oil makes brownies incredibly rich.
Best oil: Vegetable or canola (neutral flavor lets chocolate shine).
Muffins & Quick Breads
Substitution: 1:1 by volume (1 cup butter → ¾ cup oil by weight ratio)
Result: Tender crumb, stays fresh longer. Perfect for banana bread, zucchini bread.
Best oil: Light olive oil, avocado oil, or vegetable oil.
Layer Cakes & Sheet Cakes
Substitution: Use 80% of butter weight in oil
Result: Moist, tender cake that doesn't dry out. Great for boxed cake mix upgrades.
Best oil: Canola, vegetable, or light-flavored olive oil.
Pancakes & Waffles
Substitution: 1:1 works great
Result: Fluffy interior, crispy exterior. No difference in taste.
Pro tip: Oil is easier to mix into batter than cold butter.
Use Caution with Oil Substitution
Sugar Cookies & Cut-Out Cookies
Issue: Oil makes dough too soft to roll and cut shapes.
Alternative: Use 50% butter + 50% oil, or stick with butter.
Puff Pastry & Croissants
Issue: Requires solid fat layers for flakiness. Oil cannot create laminated layers.
Alternative: Must use butter or solid fats only.
Do NOT Substitute Oil in These Recipes
- Buttercream Frosting: Oil-based frosting won't set or hold shape. Butter's solid structure is essential.
- Pie Crust & Tart Crust: Butter creates flaky layers through solid fat pieces. Oil makes crust greasy and dense.
- Shortbread Cookies: Butter flavor IS the recipe. Oil substitution ruins the classic taste.
- Danish Pastries: Like croissants, require laminated butter layers.
- Pound Cake (traditional): Named for "a pound of butter" - flavor is essential to the recipe.
Pro Baker Tips
- Temperature matters: Use oil at room temperature, just like softened butter.
- Don't overmix: Oil-based batters develop gluten faster. Mix until just combined.
- Adjust baking time: Oil-based goods may bake 2-3 minutes faster.
- Choose the right oil: Neutral oils (vegetable, canola) for most baking. Olive oil for Mediterranean flavors.
- Storage advantage: Oil-based baked goods stay moist 2-3 days longer than butter-based.
More Cooking Conversions
Check out our other cooking conversion calculators:
Popular Butter-Oil Conversions
Quick access to most searched butter and oil conversions:
Frequently Asked Questions About Butter and Oil Substitutions
Can you substitute butter for oil?
Yes, you can substitute butter for oil in most recipes. The general conversion ratio is 3/4 cup of oil for every 1 cup of butter. Since butter contains about 80% fat and 20% water and milk solids, you need less oil to achieve the same amount of fat.
Example: If a recipe calls for 1 cup of butter, use approximately 3/4 cup (180 ml) of oil.
Can I substitute butter for oil in brownies?
Yes, butter works great in brownies! Use 3/4 cup of melted butter for every 1/2 cup of oil called for in brownie recipes. Butter adds richness and a deeper flavor compared to oil.
Tip: Melt the butter and let it cool slightly before mixing into your brownie batter for best results.
Can you use butter instead of oil in cake mix?
Absolutely! Substitute melted butter for oil in cake mixes using a 1:1 ratio. This creates a richer, more flavorful cake with a denser, more tender crumb.
Pro tip: For boxed cake mix, use the same amount of melted butter as the oil called for on the package.
How much butter equals 1/2 cup oil?
2/3 cup (about 150 grams or 11 tablespoons) of butter equals 1/2 cup of oil.
Use our converter above for precise measurements, or this quick reference:
- 1/4 cup oil = 1/3 cup butter (75g)
- 1/2 cup oil = 2/3 cup butter (150g)
- 1 cup oil = 1-1/3 cups butter (300g)
Can I use butter instead of vegetable oil?
Yes, butter can replace vegetable oil in baking. Use about 25% more butter than the amount of oil called for. Butter adds flavor but also introduces water content, which can affect texture.
Best for: Cakes, brownies, cookies, and muffins where butter flavor is desirable.
Not ideal for: High-heat frying or recipes requiring a neutral flavor.
Is butter healthier than oil?
It depends on the type of oil and your dietary needs.
Butter: Contains saturated fat, vitamins A, D, E, and K. Higher in cholesterol.
Olive Oil: Rich in monounsaturated fats and antioxidants. Heart-healthy option.
Vegetable/Canola Oil: Lower in saturated fat but more processed.
Coconut Oil: High in saturated fat but contains MCTs (medium-chain triglycerides).
For heart health, olive oil is generally recommended. For baking flavor, butter is preferred.
Can you substitute oil for butter in cookies?
Yes, but cookies will have a different texture. Use 3/4 cup of oil for every 1 cup of butter. Oil makes cookies softer and chewier, while butter creates crispy, flavorful cookies.
Note: Oil doesn't provide the same structure as butter, so cookies may spread more during baking.
Can I substitute coconut oil for butter?
Yes, coconut oil is an excellent 1:1 substitute for butter. Use the same amount of coconut oil (solid or melted) as the butter called for in your recipe.
Benefits: Dairy-free, vegan-friendly, adds subtle coconut flavor (use refined coconut oil for neutral taste).
Best for: Baking, sautéing, and recipes where coconut flavor complements the dish.
What is the ratio of butter to oil?
The conversion ratio is 3:4 (butter to oil).
Formula:
- Oil to Butter: Oil amount × 1.33 = Butter amount
- Butter to Oil: Butter amount × 0.75 = Oil amount
Quick Reference:
- 1 stick butter (113g) = 85ml oil
- 1 tablespoon butter = 3/4 tablespoon oil
- 1 cup butter = 3/4 cup oil
Can you substitute olive oil for butter?
Yes, olive oil can replace butter in many recipes. Use 3/4 cup of olive oil for every 1 cup of butter. Olive oil adds a fruity, savory flavor that works well in savory dishes and some baked goods.
Best for: Bread, focaccia, savory muffins, and Mediterranean-style cakes.
Not ideal for: Sweet desserts where butter flavor is essential (like sugar cookies or pound cake).
Butter-Oil Substitutions for Popular Recipes
Brownies
Butter instead of oil: Use 2/3 cup melted butter for 1/2 cup oil. This creates fudgier, richer brownies.
Oil instead of butter: Use 3/4 cup oil for 1 cup butter. Brownies will be more moist and cake-like.
Try: Convert 1/2 cup oil to butter or Convert 2/3 cup butter to oil
Cookies
Butter instead of oil: Use 1-1/3 cups butter for 1 cup oil. Butter creates crispy edges and rich flavor.
Oil instead of butter: Use 3/4 cup oil for 1 cup butter. Cookies will be softer and chewier.
Try: Convert 1 cup oil to butter for cookies
Cake Mix
Butter instead of oil: Use equal amounts of melted butter. Standard box mix calls for 1/2 cup oil = use 1/2 cup melted butter.
Result: Richer flavor, more tender crumb, slightly denser texture.
Try: Convert 1/2 cup oil to grams of butter
Muffins
Oil to butter ratio: 1/3 cup oil = 1/2 cup (113g) butter
Tip: Butter makes muffins more cake-like, oil keeps them moist longer.
Bread
Olive oil instead of butter: Use 3/4 cup olive oil for 1 cup butter in bread recipes.
Result: Softer crust, longer shelf life, Mediterranean flavor.
Quick Conversion Reference Table
| Oil Amount | Butter Equivalent | Common Use |
|---|---|---|
| 1/4 cup (60ml) | 1/3 cup (75g, 5 Tbsp) | Small batch cookies, muffins |
| 1/3 cup (80ml) | 7 Tbsp (100g) | 8-inch cake, quick breads |
| 1/2 cup (120ml) | 2/3 cup (150g, 11 Tbsp) | Box cake mix, brownie mix |
| 2/3 cup (160ml) | 7/8 cup (200g, 14 Tbsp) | Large batch brownies |
| 3/4 cup (180ml) | 1 cup (225g, 2 sticks) | Standard cake recipe |
| 1 cup (240ml) | 1-1/3 cups (300g) | Large cakes, multiple batches |
Scientific References and Sources
Butter Composition
-
Butter Fat Content (80-82%):
"The typical composition of butter is: 80-82% fat, 16-17.5% water, 1.5% salt, and 1% milk solids."
Source: Butter Science 101, Center for Dairy Research, University of Wisconsin-Madison -
European vs. American Butter:
"European-style butters typically contain 82-84% butterfat, while standard American butter contains at minimum 80% butterfat."
Source: About Olive Oil
Oil Properties
-
Cooking Oil Density (0.91-0.93 g/ml):
"The density of the oils varies with each type and temperature. The range is from 0.91 to 0.93 g/cm³ between the temperatures of 15°C and 25°C."
Source: Density of Cooking Oil, The Physics Factbook -
Oil as Pure Fat:
"Cooking oils are nearly 100% fat with no water or protein content, unlike butter which contains approximately 20% water and milk solids."
Source: OmniCalculator Food Science
Substitution Guidelines
-
¾ Cup Oil for 1 Cup Butter Rule:
"To convert butter to oil, you use a 3:4 ratio — one part of oil equals ¾ butter. When substituting oil for butter in baking, multiply the amount of butter by 0.75 to get the amount of oil needed."
Source: Instacart: Oil-to-Butter Conversion Guide -
Alternative Conversion Resources:
Additional conversion guidelines confirm the 3:4 ratio for butter to oil substitution in baking recipes.
Source: About Olive Oil: Butter to Olive Oil Conversion Chart -
Recipe Method Matters:
"Butter adds incomparable flavor, creates a stable emulsion, whips air efficiently when creamed with sugar. Butter cakes bake tall and evenly with a fine golden crumb, while oil-based cakes are moist but can be denser with different structure."
Source: King Arthur Baking: Oil for Moist Cake -
Texture Impact:
"Oil cakes bake fluffier with a more even crumb and stay moist far longer than butter cakes. Butter is 18% water, so when baked some liquid evaporates, while oil means there's more fat left in cakes to ensure tenderness."
Source: Baking Sense: How Fats Affect Cake Texture -
Butter vs. Oil Science:
"Oil coats flour uniformly, which keeps layers from being tough even if the batter is overbeaten. Oil-based cakes tend to be more moist and have a finer crumb because oil remains liquid at room temperature."
Source: Handle the Heat: Butter vs. Oil in Baking
Methodology Notes
This calculator uses the following approach:
- Calculate fat mass: Butter weight × 0.80 (accounting for 80% fat content)
- Convert fat mass to oil volume: Fat mass ÷ 0.920 g/ml (average oil density)
- Reverse conversion (oil to butter): Oil volume × 0.920 × 1.25 (inverse of 0.80)
This method provides greater precision than simple volume-based rules and is particularly useful for metric measurements and recipe scaling. However, as noted above, small variations in butter fat content (80-84%) and oil density (0.91-0.93 g/ml) mean results should be treated as close approximations rather than absolute values.