# Cooking Calculators

Kitchen math for agents: recipe scaling, safe temperatures, ovens, baker's percentages, yeast, eggs, pans, brine, ABV and coffee.

## How to pay

Machine-payable over x402. USDC on: Base (eip155:8453), Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp), Polygon (eip155:137), Arbitrum One (eip155:42161).
No accounts. No API keys. No signup. The paying wallet is the account.

## Machine-readable

- OpenAPI: https://cooking-calc.x402tookit.com/openapi.json
- x402 manifest: https://cooking-calc.x402tookit.com/.well-known/x402
- Catalog (free): https://cooking-calc.x402tookit.com/catalog
- Health (free): https://cooking-calc.x402tookit.com/health
- Uptime (free): https://cooking-calc.x402tookit.com/uptime

## Endpoints (12)

### GET /abv-gravity — $0.02
Beer, wine and cider alcohol by volume from original and final gravity, with both standard formulas and attenuation.
Params: originalGravity: number, finalGravity: number
Example: https://cooking-calc.x402tookit.com/abv-gravity?originalGravity=1.05&finalGravity=1.01

### GET /bakers-percentages — $0.02
Baker's percentages and hydration from a gram formula, counting sourdough starter, with scaling to a flour or dough weight.
Params: formula: string, starterHydrationPct?: number, targetFlourG?: number, targetDoughG?: number
Example: https://cooking-calc.x402tookit.com/bakers-percentages?formula=bread+flour%3A500%3B+water%3A350%3B+salt%3A10%3B+starter%3A100&starterHydrationPct=100

### GET /brine-salt — $0.02
Brine math: salt grams for a target strength, or the strength of a brine, with table and kosher salt spoon amounts.
Params: waterG: number, percent?: number, saltG?: number, basis?: string
Example: https://cooking-calc.x402tookit.com/brine-salt?waterG=1000&percent=5&basis=solution

### GET /coffee-brew — $0.02
Coffee grams for your water (or water for your grams) by method: drip, pour-over, press, espresso, cold brew; rough caffeine.
Params: method: string, waterMl?: number, coffeeG?: number, espressoYieldRatio?: number
Example: https://cooking-calc.x402tookit.com/coffee-brew?method=pour-over&waterMl=500

### GET /egg-sizes — $0.02
USDA egg sizes: weight per egg, and how many eggs of one size equal a recipe's count in another (for example mediums for large).
Params: count?: number, size?: string, toSize?: string
Example: https://cooking-calc.x402tookit.com/egg-sizes?count=3&size=large&toSize=medium

### GET /ingredient-density — $0.02
Approximate grams per cup, tablespoon and teaspoon for baking ingredients, with the published sources and spread.
Params: ingredient?: string
Example: https://cooking-calc.x402tookit.com/ingredient-density?ingredient=flour

### GET /oven-temperature — $0.02
Convert oven temperatures between Celsius, Fahrenheit and gas marks, with the fan-oven setting and an oven-heat name.
Params: value: string, unit: string
Example: https://cooking-calc.x402tookit.com/oven-temperature?value=180&unit=c

### GET /pan-scaling — $0.02
Baking pan volume in cups and mL for round, square and rectangular pans, and the recipe scale factor from one pan to another.
Params: from: string, to: string, unit?: string
Example: https://cooking-calc.x402tookit.com/pan-scaling?from=round%3A9x2&to=rect%3A9x13x2&unit=in

### GET /recipe-scale — $0.02
Scale a recipe's ingredient list by servings or factor: tidy fractions, spoon-to-cup bumping, optional grams, scaling cautions.
Params: ingredients: string, fromServings?: number, toServings?: number, factor?: number, grams?: boolean
Example: https://cooking-calc.x402tookit.com/recipe-scale?ingredients=2+cups+flour%3B+1+1%2F2+tsp+salt%3B+3%2F4+cup+sugar%3B+2+eggs%3B+1%2F2+cup+butter&fromServings=4&toServings=6&grams=true

### GET /roast-times — $0.02
USDA roasting time guides: turkey (stuffed or not, by weight), beef rib roast, pork loin and leg of lamb. Guides, not doneness.
Params: food: string, weightLb: number, stuffed?: boolean, cut?: string
Example: https://cooking-calc.x402tookit.com/roast-times?food=turkey&weightLb=16&stuffed=false

### GET /safe-temperatures — $0.02
USDA minimum internal cooking temperature for a food (poultry, ground meat, steaks, fish, eggs), plus a check of your reading.
Params: food?: string, measuredF?: number, measuredC?: number
Example: https://cooking-calc.x402tookit.com/safe-temperatures?food=ground+beef&measuredF=158

### GET /yeast-sourdough — $0.02
Convert fresh, active dry and instant yeast, split a sourdough starter into flour and water, or plan a starter feed.
Params: mode: string, amountG?: number, from?: string, to?: string, starterG?: number, hydrationPct?: number, targetG?: number, ratio?: string
Example: https://cooking-calc.x402tookit.com/yeast-sourdough?mode=yeast&amountG=7&from=instant&to=fresh

## Terms

Kitchen calculators using published reference tables (USDA, King Arthur Baking, SCA) and local arithmetic, provided as is. Ingredient densities are approximate and vary with brand and packing; times and temperatures are guides. Food safety figures restate USDA minimums and are not a guarantee that food is safe: use a thermometer, follow current USDA guidance, and take extra care for pregnancy, infants, the elderly, allergies and weakened immunity.