Volume Converter

About the Volume Converter

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 to see the converted output right away.

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 converter 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.

When This Page Helps

Cooking with recipes from different countries, comparing fuel economy figures, measuring chemicals in the lab, or calculating container capacities all require volume conversion. This calculator covers every common unit in one place and prevents costly US/Imperial confusion.

How to Use the Inputs

1. Select the unit you are converting from.
2. Select the unit you are converting to.
3. Enter the numeric value to convert.
4. The result appears in the output panel.
5. Reference the conversion factors for common unit pairs.

Example Calculation

Tips & Best Practices

• US gallon (3.785 L) and Imperial gallon (4.546 L) are NOT the same — always check which system a recipe or label uses.
• For cooking: 1 cup = 16 tablespoons = 48 teaspoons = 236.6 mL.
• A liter of water weighs almost exactly 1 kilogram at room temperature.
• Quick estimate: 1 quart ≈ 1 liter (it's actually about 5% less).
• Fluid ounces measure volume, not weight — a fluid ounce of honey weighs more than a fluid ounce of water.

Volume Units Explained

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.

US vs. Imperial Volume Units

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.

Volume in Cooking

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.

Frequently Asked Questions

• How many liters in a gallon?

  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.

• How many cups in a liter?

  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.

• What is the difference between fluid ounces and ounces?

  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.

• How do I convert tablespoons to milliliters?

  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.

• Is a US cup the same as a metric cup?

  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.

• How many tablespoons in a cup?

  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.