Kitchen Unit Conversions

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Unit conversions between all the various kitchen measurements of temperature, weight, volume and length used around the world gets complicated very quickly. Since I’m based in Australia, Southside Kitchen recipes are all given using standard Australian metric measurements. While these easily translate to the rest of the world, this page outlines how to approach unit conversions for some of the most common scales.

Volume – Cups and spoons

The standard Australian measurement for a cup is 250ml. This is the equivalent to 0.96 of a standard United States cup (240ml) and 0.9 of a standard United Kingdom cup (225ml).

The table below outlines the standard cup measurements and their metric equivalents.

Metric (millilitres)Australian Cups and Spoons
1.25 ml¼ teaspoon (tsp)
2.5 ml½ teaspoon (tsp)
5 ml1 teaspoon (tsp)
¼ tablespoon (tbsp)
10 ml2 teaspoons (tsp)
½ tablespoon (tbsp)
1 dessertspoon
20 ml1 tablespoon (tbsp)
60 ml¼ cup
80 ml⅓ cup
125 ml½ cup
170 ml⅔ cup
190 ml¾ cup
250 ml1 cup
500 ml2 cups
1 L (litre)4 cups
Unit conversions for volume

Oven temperatures

All the recipes on Southside Kitchen are given in degrees Celsius and assume a fan-forced oven. If you need to convert these to a different oven type, you can use the table below for approximate equivalents. Keep in mind that no two ovens are the same so it’s worth investing in an oven thermometer to keep an eye on the actual temperature inside your oven.

Celsius
(fan-forced)
Celsius
(traditional electric)
FahrenheitGas Mark
100ºC110ºC212ºF1/4
150ºC160ºC302ºF2
160ºC170ºC320ºF3
170ºC180ºC338ºF4
180ºC190ºC356ºF5
190ºC200ºC374ºF6
200ºC210ºC392ºF
210ºC220ºC410ºF7
220ºC230ºC428ºF8
230ºC240ºC446ºF
240ºC250ºC464ºF9
Unit conversions for oven temperature

Length (distance)

If you need to convert the size of a baking tray or some other length mentioned in a recipe, the formula to convert exact measurements from metric to imperial is to multiply the number of centimetres by 0.39. For instance 5 cm x 0.39 = 1.97 inches. It’s always handy to have a simple ruler available in the kitchen too.

The table below outlines some common conversions that have been rounded to their approximate equivalents:

CentimetresMillimetresImperial (approx.)
1 cm10 mm⅜ inch
1½ cm15 mm½ inch
2 cm20 mm¾ inch
3 cm30 mm1½ inches
5 cm50 mm2½ inches
9 cm90 mm4 inches
12½ cm125 mm5 inches
25 cm250 mm12 inches
35 cm350 mm1½ feet
65 cm650 mm3 feet
100 cm (1 metre)1000 mm1 yard
Unit conversions for length

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