How much whipped cream do you need for a cake — a diameter guide
The question "how much do I need" depends on three things: the cake’s diameter, whether you’re only decorating or also filling between layers, and how thick a layer you want. The table below is a rough estimate for a standard, evenly covered cake — for a rustic or "naked cake" style, plan for up to 30% less.
Rough amounts by diameter
Diameter 18-20 cm: about 400-500 ml of whipped cream for decorating, plus roughly the same again if you’re also filling between layers.
Diameter 22-24 cm: about 600-700 ml for decorating, plus extra for filling.
Diameter 26-28 cm: about 800-900 ml for decorating, plus extra for filling.
30 cm and larger (wedding, multi-tier cakes): calculate each tier separately using that tier’s own diameter, then add them up — and always make 10-15% more than the table shows, for touch-ups during decorating.
From powder to finished cream
Whipped cream has a greater volume than the liquid it’s made from — typically around 1.5 to 2 times. When working out how much powder to buy, start from the finished volume of cream you need and work backward using the ratio stated on your product’s packaging.
Read next
How to make stable whipped cream for cake decorating
Powder-to-liquid ratio, temperature, and whipping time — step by step to whipped cream that holds its shape on a piping bag and doesn’t weep.
Why won’t my whipped cream set — 7 common mistakes
Whipped cream staying watery, not rising, or splitting an hour later? Here are seven common causes and how to fix them on your very next cake.
Classic no-bake whipped cream cake with fresh raspberries
Layers of biscuits and whipped cream, topped with fresh raspberries — no baking, ready in a few hours in the fridge. A recipe with exact amounts for a 24 cm cake.