Gallon (US) to Cubic Decimeter Converter
Unit Converter
Instant · Precise · Universal
47 units available
6 categories total
How to Convert Gallon (US) to Cubic Decimeter
To liters: multiply by 3.785. To UK gallons: multiply by 0.832674. To cubic meters: multiply by 0.003785.
1 US gal = 4 US qt = 8 US pt = 16 US cups = 128 US fl oz = 3.785411784 L.
For example, 1 Gallon (US) (gal (US)) = 3.785411784 Cubic Decimeter (dm³).
Gallon (US) to Cubic Decimeter — Common Values
| Gallon (US) (gal (US)) | Cubic Decimeter (dm³) |
|---|---|
| 0.1 | 0.3785411784 |
| 0.5 | 1.892705892 |
| 1 | 3.785411784 |
| 2 | 7.570823568 |
| 5 | 18.92705892 |
| 10 | 37.85411784 |
| 25 | 94.6352946 |
| 50 | 189.2705892 |
| 100 | 378.5411784 |
| 500 | 1892.705892 |
| 1000 | 3785.411784 |
About Gallon (US) (gal (US))
Definition
The US gallon is a unit of volume equal to 128 US fluid ounces, or approximately 3.785 liters, used for large liquid volumes.
Mathematical Relationship
1 US gal = 4 US qt = 8 US pt = 16 US cups = 128 US fl oz = 3.785411784 L.
Conversion Formula
To liters: multiply by 3.785. To UK gallons: multiply by 0.832674. To cubic meters: multiply by 0.003785.
Practical Applications
Fuel prices ($/gal), milk jugs, water cooler bottles, swimming pool chemicals, and paint quantities.
Interesting Facts
The US gallon is smaller than the UK gallon: 3.785 L vs. 4.546 L. This means UK fuel economy figures look better by number!
Common Mistakes
Confusing US and UK gallons — UK gallons are 20% larger. Fuel economy (mpg) differs significantly between the two systems.
Educational Tips
1 gallon ≈ 3.8 liters ≈ a large milk jug. 4 quarts = 1 gallon. A gallon of water weighs about 8.3 pounds.
About Cubic Decimeter (dm³)
Definition
The cubic decimeter is a unit of volume equal to a cube with edges of one decimeter (0.001 m³), and is exactly equal to one liter.
Mathematical Relationship
1 dm³ = 0.001 m³ = 1 L = 1,000 cm³ = 10⁶ mm³. One cubic meter contains 1,000 dm³.
Conversion Formula
To liters: 1 dm³ = 1 L (exact). To cubic meters: divide by 1,000. To gallons (US): multiply by 0.264172.
Practical Applications
Used interchangeably with liters — applicable to beverage volumes, fuel measurements, and container sizing.
Interesting Facts
The dm³ is one of the few SI-derived units that has a more popular non-SI alternative (the liter) used even in scientific contexts.
Common Mistakes
Not recognizing that 1 dm³ = 1 L exactly. Some assume they are only approximately equal due to historical definitions.
Educational Tips
Visualize a cube that is 10 cm × 10 cm × 10 cm — that is one dm³ and also exactly one liter.