Batch yield calculator
Updated
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The arithmetic
1. Weigh everything in. Total input weight, in grams or pounds.
2. Weigh the finished batch after cooking, blending and any straining, before filling.
3. Count the bottles that came out and weigh a sample.
Reduction loss = input weight minus finished weight. Mostly water, plus strainer pulp if you strain.
Transfer loss = finished weight minus (bottles x average fill). What stayed in the pot, blender, strainer and funnel.
Bottles per batch = finished weight divided by target fill weight, minus transfer loss.
Where it goes
Worked example
Input 10,000 g. Finished after reduction and straining 7,400 g. Target fill 150 g per bottle. Bottles produced 46, average fill 152 g, so 6,992 g bottled.
Reduction and strain loss: 2,600 g, or 26 percent. Transfer loss: 408 g, or 5.5 percent of the finished batch. Bottles per 10 kg of input: 46, where the recipe arithmetic alone would have predicted 66.
That 30 percent gap is normal on a first measurement and it is the number that makes a price sustainable or not.