How much buttercream do I need?

Buttercream can be applied in different ways - from a thin crumb coat t a thick top coat with borders and decorations. Cupcake decorating can range from a thin coat as a basis for a fondant top to a beautiful large swirl. The amount of buttercream required for a cake or cupcake can vary considerably depending on the project. Please find below a guideline on how much estimated buttercream is required based on the shape and size of the cake.

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Cake Shape Size (inches) Size (cm) Buttercream Icing
Rounds 3" high
6" 15.24cm 400g
8" 20.32cm 600g
10" 25.4cm 860g
12" 30.48cm 1100g
14" 35.56cm 1500g
16" 40.64cm 1900g
Rounds 4" high
6" 15.24cm 535g
8" 20.32cm 800g
10" 25.4cm 1150g
12" 30.48cm 1500g
14" 35.56cm 2000g
16" 40.64cm 2550g
Squares 3" high
6" 15.24cm 535g
8" 20.32cm 800g
10" 25.4cm 1150g
12" 30.48cm 1500g
14" 35.56cm 2000g
16" 40.64cm 2550g
Squares 4" high

6" 15.24cm 725g
8" 20.32cm 1100g
10" 25.4cm 1550g
12" 30.48cm 2000g
14" 35.56cm 2670g
16" 40.64cm 3400g
Cupcakes Spreading on top 30g per cupcake
Swirl on top 90g per cupcake
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