Convert Cubic Decimeter to US Gallon
Convert cubic decimeters to us gallons instantly. 1 cubic decimeter = 0.2641720524 us gallon — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Gallon to Cubic Decimeter converter for the reverse conversion.
Units explained
Cubic Decimeter
A cubic decimeter is the volume of a cube one decimeter on a side, exactly equal to one liter (0.001 m³).
Derived from the decimeter; in 1964 the CGPM defined the liter as exactly one cubic decimeter.
Common in chemistry and engineering as an exact synonym for the liter.
CGPM, 1964.
US Gallon
The US liquid gallon is defined as exactly 231 cubic inches (3.785411784 liters).
Based on the English wine gallon of 231 cubic inches, retained by the US after 1824.
The primary US unit for fuel, milk and large beverage containers.
English wine gallon; US since 1824.
Cubic Decimeter to US Gallon conversion formula
The relationship between cubic decimeters and us gallons:
To convert cubic decimeters to us gallons, multiply the value in cubic decimeters by 0.2641720524. To reverse, multiply us gallons by 3.785411784.
How to use this converter
Type a value into the calculator. The result in us gallons updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Gallon to Cubic Decimeter converter for the reverse direction.
Step-by-step: convert cubic decimeters to us gallons
- Write down the value in cubic decimeters (dm³).
- Multiply that value by the factor 0.2641720524.
- The product is the equivalent value in us gallons (gal).
- To reverse, multiply the us gallon value by 3.785411784.
Worked examples
Example 1 — Convert 1 dm³ to gal:
1 × 0.2641720524 = 0.2641720524 gal
Example 2 — Convert 100 dm³ to gal:
100 × 0.2641720524 = 26.4172052358 gal
Real-world example — Ruler-scale measurements
A 30-cubic decimeter school ruler converts cleanly to us gallons — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 dm³ × 0.2641720524 = 7.9251615707 gal
Real-world example — Hardware-scale dimensions
A 10-cubic decimeter fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between cubic decimeters and us gallons daily when mixing metric and imperial tools.
10 dm³ × 0.2641720524 = 2.6417205236 gal
Real-world example — Postcard and small-object dimensions
A postcard is about 5 cubic decimeters wide. Converting to us gallons is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 dm³ × 0.2641720524 = 1.3208602618 gal
Cubic Decimeter to US Gallon conversion table
Standard reference values for converting cubic decimeters to us gallons:
| Cubic Decimeter [dm³] | US Gallon [gal] |
|---|---|
| 0.01 | 0.0026417205 |
| 0.1 | 0.0264172052 |
| 1 | 0.2641720524 |
| 2 | 0.5283441047 |
| 3 | 0.7925161571 |
| 4 | 1.0566882094 |
| 5 | 1.3208602618 |
| 10 | 2.6417205236 |
| 20 | 5.2834410472 |
| 30 | 7.9251615707 |
| 40 | 10.5668820943 |
| 50 | 13.2086026179 |
| 100 | 26.4172052358 |
| 500 | 132.0860261791 |
| 1000 | 264.1720523581 |
Frequently asked questions
How many us gallons is 1 cubic decimeter?
How do I convert cubic decimeters to us gallons?
How do I convert us gallons back to cubic decimeters?
How many us gallons is 100 cubic decimeters?
Popular volume unit conversions
Convert Cubic Decimeter to other volume units
Show all Cubic Decimeter conversions
Metric / SI (6 units)
US Customary (Liquid) (8 units)
Imperial (UK) (4 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (3 units)
Sources & references
Conversion factor (1 dm³ = 0.2641720524 gal) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.