Cooking Ratio Calculator
Work from common rice, pasta, grain and liquid ratios, then adjust for the number of portions you are cooking.
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Clear CalculatorsKitchen toolsKitchen Tools
Browser calculators for the cooking jobs that usually need a scrap of paper: scaling a recipe, converting oven heat, planning how much food to cook, and turning cups into grams.
Recipe Scaler
Multiply or divide ingredient amounts when a recipe is written for a different number of servings.
Open calculatorOven Temperature Converter
Convert between fan, conventional, gas mark and Fahrenheit as a starting point for a recipe card.
Open converterAir Fryer Converter
Turn an oven temperature and time into a practical air-fryer starting point, then check the food and the appliance manual.
Open converterPortion Calculator
Plan rice, pasta, potatoes, vegetables and mains for a group, including a simple leftovers allowance.
Open calculatorKitchen Unit Converter
Convert cups, spoons, millilitres, grams and ounces with ingredient-specific density estimates.
Open converterWhy these tools sit together
Home cooking questions are usually conversions, not recipes. A packet says 180°C fan, a US recipe uses cups, or you need to cook for eight instead of four. These calculators keep those jobs in one toolkit instead of mixing them into the UK pay and shopping tools.
The numbers are starting points. Appliance performance, food size, altitude and packing density all change real cooking times and weights. Always check the food is cooked through and follow the appliance instructions.
How to choose the right kitchen tool
Use the recipe scaler when the ingredient list is already written and you only need a new serving count. Use the cooking-ratio calculator when you are working from a staple such as rice or pasta rather than a full recipe. Use the portion calculator when the question is “how much food for this many people?” rather than converting units.
Use the oven converter for recipe-card temperatures, then the air-fryer converter if you are moving that same cook to a basket fryer. Use the kitchen unit converter last when the recipe mixes cups, spoons and grams.
What these tools do not do
They do not replace food-safety guidance, allergen labelling or your oven or air-fryer manual. They do not know the size of the food, whether it is frozen, or how your particular appliance runs. Treat every time and temperature as a first guess, then adjust.
Cup-to-gram results depend on how tightly an ingredient is packed. Flour, sugar and grated cheese can differ a lot between kitchens, so weigh when accuracy matters.