If you have ever tried to cook a US recipe from the UK, or an Australian recipe while living in Canada, you've encountered the confusion between metric and imperial measurement systems. Here's a practical guide to navigating both.
The Two Systems
US Customary (Imperial):
- Volume: teaspoons (tsp), tablespoons (tbsp), cups, fluid ounces (fl oz), pints, quarts, gallons
- Weight: ounces (oz), pounds (lb)
- Temperature: Fahrenheit (°F)
Metric:
- Volume: millilitres (ml), litres (l)
- Weight: grams (g), kilograms (kg)
- Temperature: Celsius (°C)
Why Metric Is Better for Baking
Metric measurements are more precise and easier to scale. Weighing 200g of flour is the same every time; measuring 1 cup of flour varies depending on how it's packed, scooped, or settled.
Professional bakers worldwide use weight measurements in grams (or kilograms for large batches). The UK, Australia, New Zealand, and most of Europe use grams for baking. The US remains the primary holdout for cup measurements.
Key Conversions
| US | Metric |
|---|---|
| 1 cup | 236.6 ml |
| 1 fl oz | 29.6 ml |
| 1 oz | 28.3g |
| 1 lb | 453.6g |
| 350°F | 180°C |
The Cup Confusion
The "metric cup" used in Australia and New Zealand is 250ml, not 236.6ml like the US cup. This difference is small but can affect precise baking recipes. Always check which cup a recipe uses — look for context clues like the author's location.
Practical Approach
Keep a kitchen scale and a set of measuring cups. For critical baking, use weights. For casual cooking, cups and spoons are fine. When converting between systems, use our conversion tool for accuracy rather than mental maths.