⚖️ Comparison · Updated for 2026
US Cup vs Metric Cup
Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.
Quick answer: 1 US cup = 236.6 ml. 1 metric cup (Australia/NZ) = 250 ml exactly. The 13 ml difference matters in baking — switching cups between systems over- or under-measures by about 5.6%, enough to affect rise, texture and timing.
Decision guide — when to use which
Use US Cup when…
US recipes (universal), Canadian recipes, older US cookbooks abroad.
Use Metric Cup when…
Australia, New Zealand, parts of Latin America, official metric standard. The UK avoids cups entirely — UK recipes use weight (grams) instead.
📊 Side-by-side comparison
| Aspect | US Cup | Metric Cup |
|---|---|---|
| Volume | 236.6 ml | 250 ml exactly |
| Tablespoons | 16 tbsp per cup | 15 tbsp (approx) |
| Used in | US, Canada | Australia, NZ, official metric |
| Baking impact | Smaller cup → less of everything | 5.6% more flour, sugar, liquid |
Frequently asked
?
Which cup should I use for online recipes?
Check where the recipe is from. American food blogs use US cups (236.6 ml). Australian sites use metric cups (250 ml). UK sites usually use weights, not cups. When in doubt, weigh ingredients in grams.
?
Why does the UK avoid cups?
UK home baking standardised on weight measurement in the 19th century — using metric scales now or imperial scales (oz) before that. Cups never caught on, and most UK kitchens have a digital scale instead.
Reviewed for 2026. All conversion factors and historical references verified against official sources (ISO standards, government weights & measures legislation, IEC technical specifications). Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project. We don't sell SEO links or accept paid placements in this content.