Convert US Gallon to Cubic Yard
Convert us gallons to cubic yards instantly. 1 us gallon = 0.0049511317 cubic yard — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Cubic Yard to US Gallon converter for the reverse conversion.
Units explained
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 Yard
A cubic yard is the volume of a cube one yard on a side (0.764555 m³).
Derived by cubing the international yard (0.9144 m, fixed 1959).
The standard US/UK unit for concrete, soil and bulk landscaping.
1959 yard agreement.
US Gallon to Cubic Yard conversion formula
The relationship between us gallons and cubic yards:
To convert us gallons to cubic yards, multiply the value in us gallons by 0.0049511317. To reverse, multiply cubic yards by 201.974025974.
How to use this converter
Type a value into the calculator. The result in cubic yards updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Cubic Yard to US Gallon converter for the reverse direction.
Step-by-step: convert us gallons to cubic yards
- Write down the value in us gallons (gal).
- Multiply that value by the factor 0.0049511317.
- The product is the equivalent value in cubic yards (yd³).
- To reverse, multiply the cubic yard value by 201.974025974.
Worked examples
Example 1 — Convert 1 gal to yd³:
1 × 0.0049511317 = 0.0049511317 yd³
Example 2 — Convert 100 gal to yd³:
100 × 0.0049511317 = 0.4951131687 yd³
Real-world example — Body height conversion
You enter your height as 180 us gallons into an international job or visa application. The form then asks for the same value in cubic yards — converting between these adjacent units is one of the most-used length conversions globally.
180 gal × 0.0049511317 = 0.8912037037 yd³
Real-world example — Furniture and large objects
A 72-us gallon piece of furniture converts to a value in cubic yards that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 gal × 0.0049511317 = 0.3564814815 yd³
Real-world example — Children's height milestones
A 150-us gallon-tall child measures a value in cubic yards that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 gal × 0.0049511317 = 0.7426697531 yd³
US Gallon to Cubic Yard conversion table
Standard reference values for converting us gallons to cubic yards:
| US Gallon [gal] | Cubic Yard [yd³] |
|---|---|
| 0.01 | 4.951132e-5 |
| 0.1 | 0.0004951132 |
| 1 | 0.0049511317 |
| 2 | 0.0099022634 |
| 3 | 0.0148533951 |
| 4 | 0.0198045267 |
| 5 | 0.0247556584 |
| 10 | 0.0495113169 |
| 20 | 0.0990226337 |
| 30 | 0.1485339506 |
| 40 | 0.1980452675 |
| 50 | 0.2475565844 |
| 100 | 0.4951131687 |
| 500 | 2.4755658436 |
| 1000 | 4.9511316872 |
Frequently asked questions
How many cubic yards is 1 us gallon?
How do I convert us gallons to cubic yards?
How do I convert cubic yards back to us gallons?
How many cubic yards is 100 us gallons?
Popular volume unit conversions
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Metric / SI (15 units)
US Customary (Liquid) (14 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 0.0049511317 yd³) 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.