About

Cooking recipes found online often fail because of a hidden variable: the definition of a "Cup". A US Cup is 240 ml (Legal) or 236 ml (Customary), while a Japanese Cup is 200 ml, and a Metric Cup is 250 ml. Using the wrong standard in baking can ruin the hydration ratio of dough.

This tool disambiguates these units, offering precise conversions for mixology and patisserie. Whether you are converting a vintage British recipe (Imperial units) or a modern American blog post, this converter ensures your liquids are measured in universal Milliliters.

Formulas

Volume conversion is a scalar multiplication. To solve the "Cup" ambiguity:

{

V_ml = V_cup × 240 if US LegalV_ml = V_cup × 250 if MetricV_ml = V_cup × 200 if Japanese

Reference Data

Unit	Standard	Milliliters (ml)
Teaspoon	US	4.93
Teaspoon	Imperial (UK)	5.92
Tablespoon	US	14.79
Tablespoon	Imperial (UK)	17.76
Tablespoon	Australia	20.00
Fluid Ounce	US	29.57
Fluid Ounce	Imperial (UK)	28.41
Cup	US Legal	240.00
Cup	US Customary	236.59
Cup	Metric	250.00
Cup	Japanese	200.00
Gallon	US Liquid	3,785.41

Frequently Asked Questions

For nutrition labeling, the "Legal Cup" (240 ml) is used. For old family recipes or cookbooks, the "Customary Cup" (approx 236.6 ml) is traditional. The difference (3.4 ml) is usually negligible unless scaling up largely.

Australia defines a tablespoon as 20 ml, whereas most of the world uses roughly 15 ml (US/UK). This 5 ml difference is significant - an Australian tablespoon is 33% larger.

There is no global standard. A US single shot is often 44 ml (1.5 oz), while in the UK it might be 25 ml or 35 ml. Always check the local standard.

Technically yes, liquids expand with heat. However, for cooking purposes, these volume definitions refer to the container size, not the mass of the liquid, so temperature is usually ignored.