Kitchen Maths Calculators
General-purpose calculators for scaling, costing, timing, and kitchen arithmetic.
Ingredient Cost Calculator
Calculate the cost of ingredients used in a recipe from packet prices and quantities.
Cost Per Serving Calculator
Calculate the cost per portion from total ingredient costs and number of servings.
Cooking Yield Calculator
Calculate cooked weight from raw weight using standard shrinkage percentages for meats and vegetables.
Freezer Capacity Calculator
Calculate how many portions or containers fit in your freezer by freezer volume and container size.
Defrost Time Calculator
Calculate approximate fridge defrost time for meat, poultry, and baked goods by weight.
Meal Prep Multiplier Calculator
Calculate ingredient quantities for meal prepping multiple portions across the week.
Baking Tray Size Calculator
Calculate the area and volume of baking trays and compare between sizes.
Cooking Timer Calculator
Calculate total and per-step cooking times to coordinate multiple dishes finishing together.
Food Weight After Cooking Calculator
Estimate the final weight of food after cooking based on type and cooking method.
Recipe Halving Calculator
Calculate halved and quartered measurements including awkward fractions of spoons and cups.
10 free calculators in Kitchen Maths
Essential Kitchen Arithmetic Made Simple
Cooking and baking involve more maths than most people realise. From working out how much a recipe costs per serving, to calculating how much a joint of meat will weigh after roasting, these everyday kitchen calculations can make the difference between wasted food and a perfectly planned meal. Our kitchen maths calculators handle the numbers so you can focus on cooking.
The ingredient cost calculator is especially useful for home bakers who sell at markets or fairs — it works out the true cost of ingredients used from their packet prices, so you can price your products properly. The cooking yield calculator tells you what to expect after cooking: meat typically loses 25-35% of its raw weight, while pasta and rice gain 2-3 times their dry weight. Knowing these numbers helps you buy the right amount.
For meal prep enthusiasts, the meal prep multiplier scales any recipe to the number of days you need, while the freezer capacity calculator helps you plan storage. The defrost time calculator takes the guesswork out of food safety by giving you accurate fridge-thawing times based on weight. And for anyone who has ever struggled with halving a recipe that calls for 3 eggs, the recipe halving calculator handles all the awkward fractions for you.