Free Cooking Calculators UK – Recipe, Baking and Kitchen Tools

Explore Our Free Cooking and Baking Calculators

Choose a calculator to get started.

Recipe Conversion Calculator

Convert cooking measurements between grams, ounces, cups, millilitres and more.

Following a recipe that uses unfamiliar measurements?

Our free Recipe Conversion Calculator helps you convert common cooking and baking quantities between metric and imperial units.

It is particularly useful when following American recipes that use cups and Fahrenheit rather than the measurements commonly found in UK cookbooks.

You can convert:

• Grams, kilograms, ounces and pounds.

• Millilitres and litres.

• Teaspoons, tablespoons and cups.

• Selected ingredients between weight and volume.

• Common oven temperature settings.

Best for: Converting American recipes to UK measurements and switching between cooking units.

Use Our Free Recipe Conversion Calculator →

Recipe Serving Size Calculator

Increase or decrease recipe ingredients for different numbers of people.

Found a recipe for four people but need to cook for six?

Our Recipe Serving Size Calculator helps you adjust ingredient quantities without having to calculate everything manually.

Simply enter the original number of servings, the number you need and the ingredient quantities.

The calculator works out the adjusted amounts.

For example, increasing a recipe from four to six servings requires multiplying the ingredients by 1.5.

This is useful for:

• Cooking for larger families.

• Preparing meals for guests.

• Reducing recipes for one or two people.

• Scaling recipes for batch cooking.

• Creating ingredient shopping lists.

Best for: Adjusting recipes to suit different numbers of servings.

Use Our Free Recipe Serving Size Calculator →

Oven Temperature Converter

Convert Celsius, Fahrenheit, fan oven temperatures and UK Gas Marks.

Different recipes use different oven temperature systems.

A British recipe might specify 180°C or Gas Mark 4, while an American recipe may use 350°F.

Our Oven Temperature Converter helps you compare these settings and find a suitable approximate equivalent.

The calculator supports:

• Celsius to Fahrenheit.

• Fahrenheit to Celsius.

• Conventional oven to fan oven estimates.

• UK Gas Mark conversions.

• Common oven temperature reference values.

Best for: Following recipes from different countries and comparing conventional, fan and gas oven settings.

Use Our Free Oven Temperature Converter →

Cake Tin Size Converter

Adjust cake ingredients when changing the size or shape of a baking tin.

Have a cake recipe for an 8-inch round tin but only own a 9-inch tin?

Our free Cake Tin Size Converter helps estimate how much to increase or decrease ingredient quantities when using a different-sized baking tin.

It supports:

• Round cake tins.

• Square cake tins.

• Rectangular cake tins.

• Centimetres and inches.

• Ingredient scaling based on tin dimensions.

Changing tin sizes can affect the depth of the cake mixture and the baking time, so these may also need adjusting.

Best for: Home bakers adapting cake recipes to different tins.

Use Our Free Cake Tin Size Converter →

Roast Dinner Quantity Calculator

Work out how much meat, potatoes, vegetables and gravy you need for a roast dinner.

Planning a traditional Sunday roast?

Our Roast Dinner Quantity Calculator estimates food quantities based on the number of adults and children eating.

Choose your roast meat, select your favourite side dishes and adjust the quantities to suit different appetites.

The calculator can help estimate:

• Roast beef, chicken, pork, lamb or turkey breast.

• Roast and mashed potatoes.

• Carrots, parsnips, broccoli and other vegetables.

• Yorkshire puddings.

• Stuffing.

• Gravy.

• Additional quantities for leftovers.

It is useful for Sunday lunches, family celebrations and larger gatherings.

Best for: Planning roast dinner shopping quantities and reducing unnecessary food waste.

Use Our Free Roast Dinner Quantity Calculator →

Air Fryer Cooking Time Calculator

Estimate cooking times and temperatures when adapting oven recipes for an air fryer.

Air fryers have become a popular kitchen appliance, but converting conventional oven instructions into air fryer settings can sometimes be confusing.

Our Air Fryer Cooking Time Calculator provides starting estimates for cooking temperatures and times.

It considers factors such as the food type, original oven settings and cooking duration.

The calculator is useful for:

• Comparing oven and air fryer temperatures.

• Estimating air fryer cooking times.

• Adapting suitable oven recipes.

• Planning everyday air fryer meals.

Air fryer performance varies by model, food quantity and basket loading. Always check that food is thoroughly cooked, particularly meat and poultry.

Best for: Finding approximate air fryer settings when adapting suitable conventional oven recipes.

Use Our Free Air Fryer Cooking Time Calculator →

Why Use Our Free Cooking Calculators?

Cooking and baking often involve measurements, quantities and calculations that can be inconvenient to work out by hand.

Our free cooking calculators help simplify these everyday tasks.

1. Save Time in the Kitchen

Instead of searching through several conversion charts, enter your measurements into the relevant calculator and get a result quickly.

2. Convert Recipes from Around the World

Many American recipes use cups, ounces and Fahrenheit.

Our calculators help you convert these measurements into familiar UK units.

3. Adjust Recipes for Your Family

Whether you’re cooking for two people or twelve, our serving size and roast dinner calculators can help you plan ingredient quantities.

4. Improve Baking Consistency

Baking often depends on accurate ingredient measurements and suitable tin sizes.

Our recipe conversion and cake tin calculators provide useful starting points for adapting recipes.

5. Reduce Unnecessary Food Waste

Estimating ingredient quantities before shopping can help you avoid buying more food than you need.

6. Use Them on Your Phone or Tablet

Our calculators are designed to be easy to use on desktop computers, tablets and mobile devices.

Cooking Measurement Conversion Guide

Many recipes use different units depending on the country in which they were written.

The following table shows common cooking measurement conversions.

These are useful general conversions.

Remember that cups measure volume rather than weight. Converting a cup of flour or sugar into grams requires an ingredient-specific conversion.

For more detailed conversions, use our Recipe Conversion Calculator.

Common Oven Temperature Conversions

Oven temperatures are frequently written in Celsius, Fahrenheit, fan oven settings or Gas Marks.

The following chart shows commonly used approximate equivalents.

These are rounded cooking equivalents rather than exact mathematical conversions.

Actual oven performance can vary, so follow your appliance manufacturer’s guidance where appropriate.

Which Cooking Calculator Should I Use?

Not sure which tool you need?

Use this quick guide.

Each calculator has its own dedicated page with instructions, explanations and practical examples.

Cooking Calculators for UK Home Cooks

Calculator Central’s cooking tools are designed with British kitchens in mind.

Where appropriate, our calculators support:

• Grams and kilograms.

• Millilitres and litres.

• Stone, pounds and ounces where relevant.

• Celsius and Fahrenheit.

• UK Gas Marks.

• Metric and imperial baking tin sizes.

• Familiar British meals and ingredients.

This makes them useful for following traditional British recipes as well as adapting recipes from other countries.

Tips for Accurate Cooking and Baking Calculations

Use Digital Kitchen Scales

For baking, weighing ingredients in grams is generally more reliable than measuring them by volume.

Check the Recipe’s Country of Origin

Cup and fluid-ounce measurements can vary between countries.

Measure Ingredients Carefully

When baking, even relatively small measurement differences can affect the finished result.

Remember That Cooking Times May Change

Increasing a recipe’s ingredient quantities does not necessarily mean increasing the cooking time by the same percentage.

Check Appliance Instructions

Ovens and air fryers vary in performance. Conversion calculators provide estimates, not guarantees of cooking time.

Follow Food Safety Guidance

When preparing meat, poultry and other potentially hazardous foods, use appropriate food safety guidance and check that the food is safely cooked.

Frequently Asked Questions About Cooking Calculators

Are Calculator Central’s cooking calculators free?

Yes. All our cooking and baking calculators are free to use, with no registration required.

Can I convert American recipes into UK measurements?

Yes. Our Recipe Conversion Calculator supports common metric and imperial measurements, including cups, grams, ounces and millilitres.

How do I double a recipe?

Use our Recipe Serving Size Calculator. Enter the original number of servings and double it to calculate the adjusted ingredient quantities.

How do I convert Fahrenheit to Celsius for cooking?

Use our Oven Temperature Converter. For example, 350°F is approximately 177°C, commonly rounded to 180°C for conventional oven cooking.

Can I use a different-sized cake tin?

Yes. Our Cake Tin Size Converter estimates the ingredient scaling required when changing the size or shape of a baking tin.

How many roast potatoes do I need per person?

The quantity depends on appetite and the other dishes being served. Our Roast Dinner Quantity Calculator uses approximately 250 g of raw potatoes per average adult when roast potatoes are the only potato dish.

Can I convert oven recipes to air fryer settings?

Our Air Fryer Cooking Time Calculator provides approximate starting estimates. Cooking times and temperatures vary by appliance and food type.

Do cooking calculators guarantee accurate cooking results?

No. Calculators can perform measurement and quantity calculations, but cooking results also depend on ingredient characteristics, equipment, cooking methods and other factors.

Explore More Free Calculators

Calculator Central offers a growing collection of free online tools beyond cooking and baking.

Explore our other calculator categories, including:

Health Calculators: BMI, waist-to-height ratio, target heart rate and other health and fitness tools.

Everyday Calculators: Practical tools for common household and daily calculations.

Pet Calculators: Helpful tools such as our Dog Crate Size Calculator.

Browse Calculator Central to discover more free online calculators.

Start Cooking with Confidence

Whether you’re preparing a family Sunday roast, baking a celebration cake or following a recipe from another country, Calculator Central’s free Cooking Calculators provide practical help with common kitchen calculations.

Choose the calculator that suits your task, enter your measurements and get started.

Calculate. Cook. Enjoy.