Volume Converter

Volume conversion translates a value between the metric system (mL, L, m³), cooking measures (teaspoon, tablespoon, cup), the US gallon, and Korean traditional units (doe, mal). This tool converts every unit through a common liter (L) base so any pair can be computed instantly.

Enter a value, choose the from and to units, and the result updates automatically. Use Swap units to flip the two selections.

Result = value × (from-unit liters) ÷ (to-unit liters)

Common conversions: 1 doe ≈ 1.8L, 1 Korean measuring cup = 200mL, 1 mal = 18.039L, 1 US gallon ≈ 3.785L.

Doe and mal are traditional Korean volume units used since the Joseon era for trading grain and liquids. Today's measurement law defines 1 doe as about 1.8039L, though everyday use often rounds it to 1.8L for convenience (rice shops' "doet-bak" scoop is a classic example). Ten doe make up 1 mal (about 18.039L, rounded to 18L in practice), while dividing 1 doe into ten parts gives 1 hop (about 180.4mL). The 1.8L "doetbyeong" bottle used for makgeolli gets its size directly from this traditional unit.

The gallon is a classic example of a Western unit that varies by country. The US gallon is defined as 231 cubic inches, exactly 3.785411784L, while the UK (Imperial) gallon is defined as 4.54609L. The ratio between them is about 1.201, meaning a UK gallon holds roughly 20% more than a US gallon despite sharing the name "gallon." Fuel economy is reported as MPG (miles per US gallon) in the US and MPG (miles per UK gallon) in the UK, so the same "30 MPG" figure represents different actual efficiency depending on the country. This calculator uses the more internationally common US gallon as its reference.