Cake Decorating Guide
How Much Fondant Do I Need?
Find the right amount of fondant to cover your cake. Amounts are approximate and will vary depending on how thick you roll your fondant.
Round Cake
3" high (7.5cm)| Cake size | Fondant | 1kg tubs |
|---|---|---|
| 5" (13cm) | 340g | 1 |
| 6" (15cm) | 390g | 1 |
| 8" (20cm) | 510g | 1 |
| 9" (23cm) | 640g | 1 |
| 10" (25cm) | 680g | 1 |
| 12" (30cm) | 1,040g | 2 |
| 14" (36cm) | 1,350g | 2 |
| 16" (41cm) | 2,030g | 3 |
Round Cake
4" high (10cm)| Cake size | Fondant | 1kg tubs |
|---|---|---|
| 5" (13cm) | 390g | 1 |
| 6" (15cm) | 500g | 1 |
| 8" (20cm) | 670g | 1 |
| 9" (23cm) | 900g | 1 |
| 10" (25cm) | 1,010g | 2 |
| 12" (30cm) | 1,350g | 2 |
| 14" (36cm) | 2,030g | 3 |
| 16" (41cm) | 3,050g | 4 |
Square Cake
3" high (7.5cm)| Cake size | Fondant | 1kg tubs |
|---|---|---|
| 5" (13cm) | 480g | 1 |
| 6" (15cm) | 575g | 1 |
| 8" (20cm) | 867g | 1 |
| 9" (23cm) | 1,040g | 2 |
| 10" (25cm) | 1,150g | 2 |
| 12" (30cm) | 1,725g | 2 |
| 14" (36cm) | 2,300g | 3 |
| 16" (41cm) | 2,880g | 3 |
Square Cake
4" high (10cm)| Cake size | Fondant | 1kg tubs |
|---|---|---|
| 5" (13cm) | 560g | 1 |
| 6" (15cm) | 670g | 1 |
| 8" (20cm) | 1,010g | 2 |
| 9" (23cm) | 1,200g | 2 |
| 10" (25cm) | 1,350g | 2 |
| 12" (30cm) | 2,030g | 3 |
| 14" (36cm) | 2,710g | 3 |
| 16" (41cm) | 3,390g | 4 |
Handy tips
- Cake sizes are measured across the top (diameter for round cakes, side length for square cakes).
- "1kg tubs" is rounded up so you won't run short. A little extra is handy for rolling, trimming and patching.
- For tiered cakes, add up the amount for each tier.
- Rolling thinner uses less fondant, rolling thicker uses more. Around 4–5mm is a good everyday thickness.
- Not sure? Pop into our stores and our team will help you work it out.