Cooking & Recipe Calculators

Cooking and recipe calculators

Cooking maths fails in predictable places: a recipe written for four meeting a table of nine, a sourdough formula in percentages when your bowl holds grams, a holiday bird sized by optimism. This shelf holds the kitchen calculators, the small set of tools that scale, convert and portion recipes before the oven is hot and the guests are close. They are built for home cooks, with the quantities in the units kitchens actually use and the rounding kept sensible rather than robotic. They are written for kitchens: flour on the counter, a phone propped against the oil bottle, and no patience for a tool that demands an account before answering.

Good recipe maths respects how ingredients behave. Scaling is not always linear, big batches of leavening and seasoning need a cook's judgement, and each page here says where its formula stops and tasting begins. Portion guides are based on the planning figures caterers actually use, appetite and leftovers included, and every calculator shows a worked example. Everything runs in your browser, free, with no signup, and your recipes are never uploaded anywhere: paste a quantity, get the answer, close the tab. Portion figures assume ordinary appetites and a cook who would rather have leftovers than apologies, and the pages say how to adjust them for teenagers, athletes and second helpings.

The Recipe Scaler Calculator multiplies or divides a whole ingredient list by servings or by a single anchor ingredient, keeping units consistent as it goes. The Sourdough Hydration Calculator works in baker's percentages, balancing flour and water to the hydration your crumb needs, starter included. For feeding a crowd, the Pasta Per Person Calculator portions dried and fresh pasta by appetite and course, and the Turkey Per Person Calculator sizes the bird by guest count, with thawing and leftover allowances, so the centrepiece fits the table and the oven. Four tools, four perennial questions, and not one of them will ask you to create an account before dinner is served.