Volume Converter
Convert volume units effortlessly — liters, gallons, milliliters, cubic feet, fluid ounces, and more. Perfect for cooking, engineering, and everyday volume conversions.
Understanding Volume Measurements
Volume measures the three-dimensional space an object occupies or a container holds. You encounter volume measurements when cooking, filling a gas tank, buying beverages, or calculating storage capacity.
The SI unit for volume is the cubic meter (m³). For everyday use, liters and milliliters serve as practical metric units. The imperial system uses gallons, quarts, pints, and fluid ounces for liquids, plus cubic feet and inches for solid volumes.
Volume Calculation Formulas
| Shape | Formula | Example |
|---|---|---|
| Cube | Volume = side³ | 3m × 3m × 3m = 27 m³ |
| Rectangular Prism | Volume = length × width × height | 4m × 3m × 2m = 24 m³ |
| Cylinder | Volume = π × radius² × height | π × 2² × 5 = 62.83 m³ |
| Sphere | Volume = (4/3) × π × radius³ | (4/3) × π × 3³ = 113.1 m³ |
| Cone | Volume = (1/3) × π × radius² × height | (1/3) × π × 2² × 6 = 25.13 m³ |
Volume Conversion Formulas
Liters to Gallons (US)
gal = L × 0.264172
Example: 20 L × 0.264172 = 5.28 gal
Gallons to Liters
L = gal × 3.78541
Example: 10 gal × 3.78541 = 37.85 L
Cubic Meters to Cubic Feet
ft³ = m³ × 35.3147
Example: 2 m³ × 35.3147 = 70.63 ft³
Fluid Ounces to Milliliters
mL = fl oz × 29.5735
Example: 8 fl oz × 29.5735 = 236.59 mL
Common Volume Conversions
| Metric | Imperial Equivalent |
|---|---|
| 1 milliliter | 0.034 fluid ounces |
| 1 liter | 33.814 fluid ounces |
| 1 liter | 0.264 gallons |
| 1 cubic meter | 35.315 cubic feet |
| 5 liters | 1.32 gallons |
| 10 liters | 2.64 gallons |
Cooking Volume Conversions
| Unit | Metric | Imperial (fl oz) |
|---|---|---|
| 1 tablespoon | 14.79 mL | 0.5 fl oz |
| 1 teaspoon | 4.93 mL | 0.167 fl oz |
| 1 cup (US) | 236.59 mL | 8 fl oz |
| 1 pint (US) | 473.18 mL | 16 fl oz |
| 1 quart (US) | 946.35 mL | 32 fl oz |
| 1 gallon (US) | 3.785 L | 128 fl oz |
Volume Unit Reference Table
| Unit | Symbol | Equals 1 Unit In Liters | System |
|---|---|---|---|
| Milliliter | mL | 0.001 L | Metric |
| Liter | L | 1 L | Metric |
| Cubic Meter | m³ | 1,000 L | Metric (SI) |
| Cubic Centimeter | cm³ | 0.001 L | Metric |
| Teaspoon | tsp | 0.00493 L | Imperial |
| Tablespoon | tbsp | 0.01479 L | Imperial |
| Fluid Ounce (US) | fl oz | 0.02957 L | Imperial |
| Cup (US) | cup | 0.23659 L | Imperial |
| Pint (US) | pt | 0.47318 L | Imperial |
| Quart (US) | qt | 0.94635 L | Imperial |
| Gallon (US) | gal | 3.78541 L | Imperial |
| Cubic Foot | ft³ | 28.3168 L | Imperial |
Real-World Volume Examples
| Object/Container | Volume |
|---|---|
| Standard soda can | 355 mL (12 fl oz) |
| Wine bottle | 750 mL (25.4 fl oz) |
| Bathtub capacity | 150-300 L (40-80 gal) |
| Car fuel tank (average) | 50-70 L (13-18 gal) |
| Olympic swimming pool | 2,500,000 L (660,000 gal) |
| Refrigerator capacity | 400-600 L (14-21 ft³) |
When to Use Each Volume Unit
Milliliters (mL)
Medicine doses, small liquid amounts, perfume, flavorings
Liters (L)
Beverages, fuel, cooking liquids, container capacities
Cubic Meters (m³)
Large tanks, shipping containers, room volumes, water usage
Cubic Centimeters (cm³)
Engine displacement, small containers, medical measurements
Teaspoons/Tablespoons
Cooking recipes, medicine doses, small ingredient amounts
Fluid Ounces (fl oz)
Beverage servings, cosmetics, small liquid products
Gallons (gal)
Fuel, milk, large containers, water heaters (US)
Cubic Feet (ft³)
Refrigerator capacity, room volumes, shipping, HVAC
Important Volume Notes
US vs UK Gallons
US gallons equal 3.785 liters, while UK (imperial) gallons equal 4.546 liters. A UK gallon holds about 20% more than a US gallon. Always check which system your recipe or specification uses.
Dry vs Liquid Measurements
US dry gallons differ from liquid gallons. Dry gallons equal 4.405 liters versus 3.785 liters for liquid. For cooking, use standard liquid measurements unless a recipe specifically calls for dry measures.
Metric Cooking Measurements
Many countries use metric measurements in cooking. One metric cup equals 250 mL (vs 236.59 mL for US cups). Australian tablespoons equal 20 mL (vs 14.79 mL for US). Check your recipe's origin for accurate conversions.
Frequently Asked Questions
How many ounces are in a liter?
One liter equals 33.814 US fluid ounces. For quick mental math, multiply liters by 34. A standard 16.9 oz water bottle holds about 0.5 liters.
What is the difference between mL and cm³?
One milliliter equals exactly one cubic centimeter. These units measure the same volume. Milliliters describe liquids, cubic centimeters describe solids or engine displacement.
How do I convert cups to milliliters?
Multiply cups by 236.59 for US cups. Example: 2 cups × 236.59 = 473.18 mL. For metric cups, multiply by 250. One cup equals 16 tablespoons or 48 teaspoons.
How much is a gallon of water?
One US gallon equals 3.785 liters, 128 fluid ounces, or 16 cups. A gallon of water weighs approximately 8.34 pounds (3.78 kg) at room temperature.
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