Volume Converter

One US gallon = 3.78541 liters exactly. The UK (imperial) gallon is larger: 4.54609 liters. Always check whether a recipe or fuel specification means US or UK gallons. At the pump in the US, gas is sold in US gallons; in the UK, in liters.

One liter = 4.22675 US cups. One US cup = 236.588 ml = 8 US fl oz. One metric cup (used in Australia) = 250 ml. UK recipes often use ml or UK fluid ounces rather than cups. For cooking, 1 liter of water = approximately 4 cups and 3 tablespoons.

A US fluid ounce = 29.5735 ml. A UK fluid ounce = 28.4131 ml. They are close but not identical. 1 US gallon = 128 US fl oz. 1 UK gallon = 160 UK fl oz. Most international recipes use ml to avoid confusion. When a US recipe says "1 fl oz," use 30 ml as a practical approximation.

1 US tablespoon = 14.7868 ml (rounded to 15 ml in practice). 1 US teaspoon = 4.92892 ml (rounded to 5 ml). 1 Australian tablespoon = 20 ml. 1 UK tablespoon = 15 ml. Standard metric tablespoon = 15 ml. These small differences matter in precision baking.

1 liter = 0.001 cubic meters (m³), since 1 m³ = 1,000 liters. A cubic meter of water weighs 1,000 kg (1 metric ton). Swimming pools are typically measured in cubic meters or kiloliters: an Olympic pool holds 2,500 m³ = 2,500,000 liters.

In the US system: 1 US gallon = 8 US pints = 16 US cups. In the UK system: 1 UK gallon = 8 UK pints. But a UK pint (568 ml) is larger than a US pint (473 ml), so a UK gallon (4.546 L) is larger than a US gallon (3.785 L). This is a common source of confusion in recipes.

1 cubic inch = 16.3871 ml. One cubic foot = 28,316.8 ml = 28.317 liters = 7.481 US gallons. Engine displacement is often measured in cubic inches in the US (e.g. a 350 ci engine = 5.74 liters) and cubic centimeters or liters elsewhere.

A standard wine bottle holds 750 ml (0.75 liters). A magnum = 1.5 liters (2 bottles). A Jeroboam = 3 liters (4 bottles). A Methuselah = 6 liters (8 bottles). A standard beer bottle/can is typically 330 ml or 355 ml (US). A UK pint glass holds 568 ml.

There are exactly 3 teaspoons in one tablespoon, in both the US and metric systems (though the actual volumes differ slightly). US: 1 tbsp = 3 tsp = 14.79 ml. Metric: 1 tbsp = 3 tsp = 15 ml. This ratio is consistent across systems, making it easy to scale recipes up or down.

Multiply US cups by 236.6 ml (or use 240 ml as a practical approximation). Common conversions: ¼ cup = 60 ml · ⅓ cup = 80 ml · ½ cup = 120 ml · ¾ cup = 180 ml · 1 cup = 240 ml. For Australian recipes, 1 cup = 250 ml. Always check which cup measurement a recipe uses.