Convert between gallons, liters, cups, milliliters, fluid ounces, and more. Free online volume unit converter for cooking, science, and everyday use.
The Volume Converter handles all common liquid and dry volume units: gallons, liters, cups, milliliters, fluid ounces, quarts, pints, tablespoons, and teaspoons. Select your units and enter a value for an instant conversion.
Volume conversion is essential for cooking with international recipes, scientific measurements, fuel and beverage comparisons, and everyday tasks. US customary, Imperial, and metric volume units differ, and confusing them leads to significant errors.
This tool supports US customary units (the standard in American recipes and products) as well as metric units. Note that US and Imperial gallons, pints, and fluid ounces are different sizes — this calculator uses US customary values by default.
Understanding this metric in precise terms allows professionals to set achievable targets, measure progress objectively, and continuously refine their approach to time and task management. Tracking this metric consistently enables professionals to identify patterns in how they allocate time and effort, revealing opportunities to work more effectively and accomplish more each day.
Cooking with recipes from different countries, comparing fuel economy figures, measuring chemicals in the lab, or calculating container capacities all require volume conversion. This tool covers every common unit in one place and prevents costly US/Imperial confusion. Having accurate figures readily available simplifies project planning, deadline negotiation, and workload balancing conversations with managers, clients, and team members.
Conversion via base unit (liters): 1 US gallon = 3.78541 L 1 US quart = 0.946353 L 1 US pint = 0.473176 L 1 US cup = 0.236588 L 1 US fl oz = 0.0295735 L 1 US tbsp = 0.0147868 L 1 US tsp = 0.00492892 L 1 mL = 0.001 L result = value × (fromFactor / toFactor)
Result: 7.571 L
2 US gallons × 3.78541 L/gallon = 7.571 liters. Note: an Imperial gallon is larger (4.546 L), so always specify which gallon system you are using.
Volume measures the three-dimensional space occupied by a substance. For liquids, the most common units are liters (metric), gallons (US/Imperial), and cups (cooking). For scientific work, milliliters and cubic centimeters (1 mL = 1 cm³ exactly) are standard.
The US and British Imperial systems share unit names (gallon, pint, fluid ounce) but assign different sizes to each. A US gallon is 128 US fl oz (3.785 L), while an Imperial gallon is 160 Imperial fl oz (4.546 L). This 20% difference causes significant errors when the systems are confused.
American recipes use cups, tablespoons, and teaspoons. European and professional recipes often use grams (by weight) or milliliters. For best accuracy in baking, weight measurements are preferred over volume because ingredient density varies.
A US gallon equals 3.78541 liters. An Imperial gallon (used in the UK) equals 4.54609 liters. This calculator uses US gallons by default. Always check which gallon system applies to your measurement.
There are approximately 4.227 US cups in a liter. A US cup is 236.588 mL. For a quick cook's estimate, think of a liter as just over 4 cups.
Fluid ounces (fl oz) measure volume, while ounces (oz) measure weight. One US fluid ounce equals 29.5735 mL. A fluid ounce of water weighs approximately one avoirdupois ounce, but this coincidence does not hold for other liquids.
One US tablespoon equals 14.787 mL. Multiply the number of tablespoons by 14.787 to get milliliters. For teaspoons: 1 tsp = 4.929 mL.
No. A US cup is 236.588 mL, while a metric cup (used in Australia and some other countries) is exactly 250 mL. A Japanese cup is 200 mL. Always verify which cup standard a recipe uses.
There are 16 US tablespoons in a US cup. Each tablespoon contains 3 teaspoons. So one US cup = 16 tablespoons = 48 teaspoons = 236.588 mL.