Volume conversion covers 12 units. Below is a plain-English definition of each one and where you'll actually meet it in daily life.
Liter (L)
A liter is exactly 1,000 cubic centimeters, the everyday metric unit of volume.
Used for: Beverages, fuel purchases, engine displacement, and cooking liquids worldwide.
Milliliter (mL)
A milliliter is one-thousandth of a liter, equal to one cubic centimeter.
Used for: Medicine doses, laboratory measurements, cosmetics, and precise cooking.
US Gallon (gal)
The US gallon is exactly 3.785411784 liters and contains 128 US fluid ounces.
Used for: Gasoline purchases, milk and water jugs, and bulk liquid quantities in the United States.
US Quart (qt)
A US quart is one quarter of a US gallon, exactly 0.946352946 liters.
Used for: Milk cartons, engine oil, and cooking liquids in the United States.
US Pint (pt)
A US pint is one eighth of a US gallon, exactly 0.473176473 liters.
Used for: Beer, ice cream, and small liquid quantities in the United States (note: the UK pint is larger).
US Cup (cup)
A US cup is exactly 236.588236 milliliters, a standard volume for cooking.
Used for: Recipes in the United States, where dry and liquid ingredients are often measured by cup.
US Fluid Ounce (fl oz)
A US fluid ounce is 1/128 of a US gallon, exactly 29.5735295625 milliliters.
Used for: Bottled drinks, medicine dosing cups, and bartending measurements in the United States.
US Tablespoon (tbsp)
A US tablespoon is 1/16 of a cup, exactly 14.78676478125 milliliters.
Used for: Recipes, medicine dosing, and condiment portions in the United States.
US Teaspoon (tsp)
A US teaspoon is 1/48 of a cup, exactly 4.92892159375 milliliters.
Used for: Recipes, sugar in beverages, and small medicine doses in the United States.
Cubic Meter (m³)
A cubic meter is the volume of a cube with 1-meter edges, exactly 1,000 liters.
Used for: Construction volumes, gas and water metering, shipping container capacity, and forestry.
Cubic Foot (ft³)
A cubic foot is the volume of a cube with 1-foot edges, about 28.317 liters.
Used for: Refrigerator capacity, natural-gas billing, shipping volume, and mulch estimates in the US.
Cubic Inch (in³)
A cubic inch is the volume of a cube with 1-inch edges.
Used for: Classic car engine displacement (e.g., 350 cubic inches) and small mechanical volumes.