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FORMULA SHELF 2 of 370

The arithmetic behind the work: what to measure, what to type in, and what the answer comes out as. Every formula says what the symbols mean and gives a worked example, so you can check it against a job you have already done.

Quick calculators. A calculator appears where the formula is a single, clean equation with clear symbols. It is a convenience, not an authority: double-check every result yourself, especially doses, loads, torque and safety-critical settings.
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Kitchen 2 formulas

Cost per portion
cost per portion = total cost of the batch / number of portions
SYMBOLS · include the ingredients, the fuel and the time; 30 minutes of work is worth putting a figure on
UNITS · per portion
HOW TO USE

For working out what to charge at a gate sale or a market stall, and for seeing which dish actually earns.

EXAMPLE

A batch costing 34 euro that makes 20 portions costs 1.70 a portion.

cost portion pricing market stall
Nixtamal for maize tortillas
maize to lime water: 1 kg of maize per litre of water with 15-20 g of lime, soaked 12-16 hours
SYMBOLS · the nixtamal is the ground maize, and it goes stale quickly, so make it the same day
UNITS · ratio
HOW TO USE

Lime makes the maize release its niacin, which is the whole point of treating it. See Flint Corn And Popcorn.

EXAMPLE

1 kg of maize and 1 L of water with 15 g of lime makes about 1.1 kg of nixtamal.

nixtamal maize tortilla lime niacin
SOURCES & PROVENANCE 1 listed

This page is an AI-organised index. The label means the grouping and cross-links were compiled with AI; the information itself comes from the public-domain books, reports and manuals listed below. Open any source to read the local copy or follow the link to the original publication.

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Formulas collected and indexed with AI. The calculators are convenience tools; double-check every result before using it.