Gallon (US) to Milliliter Conversion Calculator: Free Online Tool
Convert US gallons to milliliters with our free online volume converter.
Gallon (US) to Milliliter Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Gallon (US)).
- The converted value in Milliliter will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Volume category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Gallon (US) to Milliliter
Converting Gallon (US) to Milliliter involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Gallon (US) = 3785.412 millilitersExample Calculation:
Convert 10 US gallons: 10 × 3785.412 = 3.7854e+4 milliliters
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Gallon (US) and a Milliliter?
The US liquid gallon (symbol gal US) is a unit of volume in the United States customary units system. It is legally defined as 231 cubic inches, which is exactly equal to 3.785411784 liters. It is commonly used for measuring larger quantities of liquids, such as gasoline, milk, and paint.
The milliliter (symbol mL or ml) is a metric unit of volume equal to one-thousandth of a liter (1/1000 L). It is also equivalent to exactly one cubic centimeter (1 cm³). The milliliter is widely used in scientific measurements, medicine, and cooking.
Note: The Gallon (US) is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Milliliter belongs to the metric (SI) system.
History of the Gallon (US) and Milliliter
The gallon has ancient roots, evolving from various Roman and medieval units. The US liquid gallon is based on the wine gallon, which was standardized in England during the reign of Queen Anne in 1707 as 231 cubic inches. This definition was adopted by the United States. It differs from the Imperial gallon used in the UK and Canada.
The milliliter derives directly from the liter, established in France in 1795. As the metric system gained international acceptance, prefixes like 'milli-' (meaning one-thousandth) were applied to base units to create smaller or larger units. The equivalence 1 mL = 1 cm³ is a fundamental relationship in the metric system.
Common Uses for US gallons and milliliters
Explore the typical applications for both Gallon (US) (imperial/US) and Milliliter (metric) to understand their common contexts.
Common Uses for US gallons
- US Fuel: Measuring fuel (gasoline, diesel) in the United States.
- US Beverages: Selling milk and other beverages in large containers in the US.
- Household Liquids: Measuring paint and other household liquids.
- Pools & Water: Pool capacity and water usage measurements in the US.
- Industry: Some industrial applications.
Common Uses for milliliters
- Medicine: Measuring liquid medicines and dosages.
- Laboratory: Laboratory work involving small liquid volumes (pipettes, burettes).
- Culinary: Cooking and baking recipes, especially for liquids.
- Packaging: Volume measurements on small containers (e.g., cosmetics, travel-size toiletries).
- Science: Scientific notation for small volumes.
Frequently Asked Questions
Questions About Gallon (US) (gal)
Is a US gallon the same as an Imperial gallon?
No. The US gallon (≈ 3.785 L) is smaller than the Imperial gallon (≈ 4.546 L). Always specify which gallon is being used if there's ambiguity.
How many quarts are in a US gallon?
There are exactly 4 US liquid quarts in 1 US liquid gallon.
How many liters are in a US gallon?
1 US liquid gallon is exactly 3.785411784 liters.
About Milliliter (mL)
Is a milliliter the same as a cubic centimeter (cc)?
Yes, 1 milliliter (mL) is exactly equal to 1 cubic centimeter (cm³ or cc). The terms are often used interchangeably, especially in medical and automotive contexts (e.g., engine displacement often uses cc).
How many milliliters are in a liter?
There are 1,000 milliliters (mL) in 1 liter (L).
Is mL or ml the correct symbol?
Both are technically correct and commonly understood. Similar to the liter (L/l), the capitalized version 'mL' is often preferred in publishing and medicine to avoid confusion between 'l' and the number '1'.
Conversion Table: Gallon (US) to Milliliter
| Gallon (US) (gal) | Milliliter (mL) |
|---|---|
| 1 | 3,785.412 |
| 5 | 18,927.059 |
| 10 | 37,854.118 |
| 25 | 94,635.295 |
| 50 | 189,270.589 |
| 100 | 378,541.178 |
| 500 | 1,892,705.89 |
| 1,000 | 3,785,411.78 |