Liter to Milliliter Converter
Quickly convert from Liter to Milliliter.
How to convert
Formula:
—
Volume is the three-dimensional space occupied by a substance or an object. It is measured in cubic units or liters.
Where is it used?
In cooking for liquids, in medicine for drug doses (ml), and in construction for the volume of concrete (cubic meters).
Examples:
• An average soda can is 330 ml.
• 1 cubic meter of water equals 1,000 liters.
• A typical US gallon is about 3.78 liters.
Volume conversion is essential in cooking, medicine, and engineering. Whether you're adapting a US recipe that calls for cups and fluid ounces, calculating fuel tank capacity in gallons versus liters, or measuring precise drug dosages in milliliters, accurate volume conversion prevents costly and dangerous mistakes.
Volume measures the three-dimensional space occupied by a substance or object. The SI unit is the cubic meter (m³), but in everyday use liters (L) and milliliters (mL) dominate for liquids, while cubic feet and gallons are common in the US and UK. Cooking uses specialized volume units like cups, tablespoons, and teaspoons.
Where is it used?
- Cooking & Baking — US recipes use cups, tablespoons, and fluid ounces; European recipes use ml and liters.
- Medicine & Pharmacy — Drug dosages in ml; IV drips in ml/hour; 1 teaspoon ≈ 5 ml for patient instructions.
- Automotive — Engine displacement in liters (L) or cubic inches (ci); fuel tanks in liters or gallons.
- Construction — Concrete and fill volumes in cubic meters or cubic yards.
- Beverages & Commerce — Wine in 750 ml bottles; beer in pints (568 ml UK / 473 ml US); soda in 2-liter bottles.
Common Conversion Mistakes
Confusing US and UK gallons
A US gallon is 3.785 L, while a UK (imperial) gallon is 4.546 L — about 20% larger. Using the wrong gallon in fuel economy or tank capacity calculations gives significant errors.
Assuming 1 cup = 250 ml everywhere
A US cup is 236.6 ml, a metric cup is 250 ml, and an Australian cup is also 250 ml. Most US recipes use 236.6 ml. Rounding to 250 ml introduces a ~6% error per cup.
Mixing up fluid ounces and weight ounces
A fluid ounce (fl oz) measures volume (29.57 ml US), not mass. 1 fl oz of water ≈ 1 oz by weight, but this only holds for water — milk, oil, and other liquids have different densities.
Forgetting that cubic centimeters equal milliliters
1 cm³ = 1 mL exactly. This equivalence is exact and very useful: a 2,000 cc engine displaces exactly 2,000 ml = 2 liters.
Quick Reference Table
| From | To |
|---|---|
| 1 liter | 1,000 mL |
| 1 US gallon | 3.785 L |
| 1 UK gallon | 4.546 L |
| 1 US cup | 236.6 mL |
| 1 fluid oz (US) | 29.57 mL |
| 1 tablespoon (US) | 14.79 mL |
| 1 teaspoon (US) | 4.93 mL |
| 1 cubic meter | 1,000 L |
Frequently Asked Questions
How many ml is a cup?
A US cup equals 236.6 mL (about 240 mL when rounded). A metric cup (used in Australia, Canada, and some other countries) equals exactly 250 mL. Most online recipes from the US use the 236.6 mL definition, so check the recipe's origin when precision matters.
What is the difference between a US gallon and a UK gallon?
A US liquid gallon is 3.785 liters, while a UK (imperial) gallon is 4.546 liters — about 20% larger. This distinction matters for fuel economy: a car getting 30 MPG (US) gets only about 36 MPG (UK) for the same efficiency, simply because the UK gallon is bigger.
Why do recipes use volume instead of weight?
In the US, home baking traditionally used volume measurements (cups, spoons) because scales weren't common household tools. Professional baking and most European recipes use weight (grams) because it's more accurate — a cup of flour can vary by 20-30% depending on how it's packed.
How do I convert liters to cubic meters?
Divide liters by 1,000. 1 m³ = 1,000 liters exactly. So 500 liters = 0.5 m³. This is because 1 m³ is a cube measuring 100 cm × 100 cm × 100 cm = 1,000,000 cm³ = 1,000,000 mL = 1,000 L.
Is a cubic centimeter (cc) the same as a milliliter?
Yes, exactly. 1 cm³ = 1 mL by definition. Engine displacement is often expressed in cubic centimeters (cc) or liters: a 1,600 cc engine = 1.6 L. Medical syringes labeled in cc and mL are measuring the same thing.
Sources & Standards
- National Institute of Standards and Technology (NIST)
- International Bureau of Weights and Measures (BIPM)
- US National Conference on Weights and Measures
Reviewed by The Unit Hub Editorial Team · March 2026