Baking Ingredient Substitution Ratio Calculator
Swapping butter for oil, or eggs for applesauce? This calculator scales the substitution ratio to your exact recipe amount so your bake still turns out right.
Substitute Amount Needed
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Original Amount (Scaled)—
Substitute Amount—
Extra Vinegar Needed (tbsp, if applicable)—
About this calculator
Convert a baking recipe ingredient like butter, eggs, or milk into a substitute with the correct ratio, scaled to your recipe's original quantity.
Frequently Asked Questions
Why is the butter-to-oil ratio 0.75?
Oil is 100% fat while butter contains water and milk solids, so you typically need about 3/4 the amount of oil compared to butter by volume.
How do flax eggs work?
One flax egg equals 1 tablespoon of ground flaxseed mixed with 3 tablespoons of water, left to gel for a few minutes. Multiply by the number of eggs needed.
Does scaling affect substitution ratios?
No, the ratio stays constant — only the total quantity changes. This calculator scales your original amount first, then applies the ratio.