Use these guides to help you get the best from your cooking. Remember to stick to either imperial or metric when you're making a recipe - don't mix the two.

Please note that Good Food recipes are tested to work in imperial and metric measures.

Sugar temperature guide

Sugar form °C °F
Thread 107 225
Soft ball 119 238
Firm ball 125 256
Hard ball 138 280
Soft crack 151 304
Hard crack 168 336

Cake tin sizes

As a rule of thumb, a square tin holds about 25% more than a round tin of the same size. If you're using a square tin for a round tin recipe, keep the temperature the same, and turn the cake during baking, as the corners tend to cook faster than the middle.

Approximate conversions

Round tin Square tin
6 inch (15cm) 5 inch (13cm)
8 inch (20cm) 7 inch (18cm)
9 inch (23cm) 8 inch (20cm)
11 inch (28cm) 10 inch (25.5cm)

Oven temperature guide

 Electricity °C Electricity (fan) °C Gas Mark
Very cool 110 90 ¼
120 100 ½
Cool 140 120 1
150 130 2
Moderate 160 140 3
180 160 4
Moderately hot 190 170 5
200 180 6
Hot 220 200 7
230 210 8
Very hot 240 220 9

Volume and weight converter