Batch Scaler — Scale Recipes Up or Down
Scale any soap, candle, cosmetic, or food recipe up or down instantly. Enter ingredients by weight or percentage. All calculations happen locally — nothing leaves your browser.
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How It Works
Batch scaling multiplies every ingredient in your recipe by the same scale factor to produce a larger or smaller batch while keeping proportions identical. The scale factor is calculated by dividing the target weight by the base recipe weight. For example, if your base recipe is 16 oz and you want a 48 oz batch, the scale factor is 48 ÷ 16 = 3.0×.
In percentage mode, each ingredient is entered as a percentage of the total (must equal 100%). The tool then calculates the actual weight for each ingredient based on your target batch size. This is useful for recipes where proportions matter more than exact weights, such as soap making where lye percentages must be precise.
Examples
Soap Recipe Scaling: A base cold process soap recipe makes 16 oz total: olive oil 40% (6.4 oz), coconut oil 30% (4.8 oz), palm oil 25% (4.0 oz), and lye 5% (0.8 oz). To scale to a 48 oz batch, multiply each ingredient by 3: olive oil 19.2 oz, coconut oil 14.4 oz, palm oil 12.0 oz, and lye 2.4 oz.
Candle Recipe Scaling: A soy candle recipe for one 8 oz jar uses 7 oz soy wax, 0.56 oz fragrance oil (8% load), and 1 wick. To make 12 candles, scale by 12×: 84 oz wax, 6.72 oz fragrance, and 12 wicks.