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Free tools for cake bakers

Real calculators, built for UK bakers, free to use as often as you like.

Cake Designer

3D

Agree the design before you turn the oven on. Style a tiered cake in 3D, with finishes, drips, florals, and a topper, then export a photo-ready image.

Open designer

Sizing & Portions

Get the size right before you quote.

Portion Calculator

Quote the right size cake the first time.

Party and wedding slice counts for any tin size, shape, or tier.

8 in round: 20 party, 24 weddingUse tool

Tin Conversion Calculator

Use the recipe you have in the tin you own.

Scale a recipe between tin sizes and shapes, with bake time guidance.

8 in to 10 in: 1.56x everythingUse tool

Cake Batter Calculator

Fill every tin level. No dome, no spill.

How much batter to fill each tin to the right depth, by size and layers.

8 in round, half full: 3.5 cupsUse tool

Cake Dowel Calculator

Stack tiers that hold from the kitchen to the table.

How many dowels each tier needs to carry the tiers above.

10, 8, 6 in stack: 9 dowels, centre rodUse tool

Cake Board and Box Sizer

Order the right board once, not twice.

What size board and box a cake needs, including the tier that has to sit on top of another.

8 in cake: 10 in board, 11 in boxUse tool

Recipe Scaler

Resize a recipe without the guesswork.

Scale a recipe up or down by yield or a set multiplier.

8 to 12 portions: 1.5x everythingUse tool

Traybake and Sheet Cake Portions

Even pieces, and the count you promised.

Servings from any tray, with the grid to cut and how many cuts to make.

9 x 13 in, party slices: 36Use tool

What Size Cake for Your Guests

The size to bake, and what each option costs you in work.

A guest count in, and every way to feed it: one tin, tiers, traybake or cupcakes.

30 guests: one 12 in roundUse tool

Cake Weight Calculator

A number for the courier, the drum, and the dowels.

What a finished cake weighs, tier by tier, with the board and the courier band.

3 tier 6, 8, 10 in: about 8.7 kgUse tool

Ingredients & Frosting

Mix the right amount, the first time.

Buttercream Calculator

Mix once. No half batch at midnight.

How much buttercream a cake takes, from a crumb coat to a smooth finish.

8 in, 3 layers: 640 g buttercreamUse tool

Cupcake Frosting Calculator

Mix enough the first time. No running short mid-swirl.

Buttercream for a batch of cupcakes, by swirl style, split into butter and icing sugar.

24 cupcakes, standard swirl: 915 gUse tool

Cake Filling Calculator

Fill every layer the same, and none of it escapes.

How much goes between the layers, by filling type, plus the buttercream dam a loose filling needs.

8 in, 3 layers: 320 g plus a damUse tool

Ganache Calculator

Set firm under fondant, or stay soft for a drip.

The right ratio by chocolate type, and how much to cover the cake.

Dark under fondant: 2 to 1Use tool

Fondant Calculator

Roll once. Reaches the board, no shortfall.

How much rolled fondant or sugarpaste to cover a cake, and how wide to roll it.

8 in round: about 750 g, roll to 18 inUse tool

Christmas Cake Calculator

Buy once, feed on time, ice with enough to spare.

Fruit, marzipan, and royal icing quantities for any tin size, plus a feeding and maturing schedule.

8 in round: 1.1 kg fruit, 750 g marzipanUse tool

Baking Substitution Calculator

Keep baking when the cupboard is missing one thing.

The exact UK swap and amount when you are out of an ingredient.

300 g self-raising: plain plus 4 tspUse tool

Cake Soaking Syrup Calculator

A moist cake that still tastes of cake, not of syrup.

Sugar syrup to soak the layers, by cake size, with the sugar and water to weigh out.

8 in, 3 layers: 200 ml, 125 g sugarUse tool

Flour Substitute Calculator

The exact weights, for the amount your recipe asks for.

Cake flour, self-raising, and bread flour made from what is already in the cupboard.

340 g cake flour: 298 g plain, 43 g cornflourUse tool

Egg Size Converter

The right amount of egg, whatever the box says.

Medium to large, and UK to US to Australian, by the weight a recipe actually means.

3 US large = 3 UK medium, not largeUse tool

Royal Icing Calculator

The batch size, and the consistency to thin it to.

Royal icing to cover a cake, pipe a border, or flood a batch of cookies.

8 in cake, 2 coats: 570 gUse tool

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