Gallon (US) to Cubic Meter Converter
Volume · unit-converter
Convert Gallon (US) to Cubic Meter with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use liter-based factors (US fluid measures, imperial UK units, SI cubic meters).
Calculator
From: Gallon (US) (gal)
To: Cubic Meter (m3)
About Gallon (US)
The US liquid gallon is defined as 231 cubic inches (about 3.78541 liters). US recipes, fuel economy, and retail liquids typically use US gallons.
About Cubic Meter
The cubic meter is the SI-derived unit of volume. One cubic meter equals 1,000 liters. Engineering, shipping containers, and scientific volumes often use m³.
How to convert gallons (us) to cubic meters
1 gallon (us) is equal to 0.00378541178 cubic meter:
1 gal = (3.78541178 L ÷ 1000 L) m3 = 0.00378541178 m3
Each gallon (us) is defined as 3.78541178 L and each cubic meter as 1000 L, so one gal equals 3.78541178 ÷ 1000 m3 = 0.00378541178 m3.
Let V(gal) be the numeric value of the same volume measured in Gallon (US) (gal), and V(m3) the value in Cubic Meter (m3). Then:
V(m3) = V(gal) × (3.78541178 / 1000)
Equivalently, divide by how many gal fit into one m3 (liters per m3 divided by liters per gal):
V(m3) = V(gal) ÷ 264.17205263729591
Or: cubic meter = gallon (us) ÷ 264.17205263729591
Examples
Example #1: Convert 20 gal to cubic meter
20 gal = 20 gal × (3.78541178/1000) m3 = 0.0757082356 m3
20 gal = 20 gal ÷ 264.17205263729591 = 0.0757082356 m3
Example #2: Convert 50 gal to cubic meter
50 gal = 50 gal × (3.78541178/1000) m3 = 0.189270589 m3
50 gal = 50 gal ÷ 264.17205263729591 = 0.189270589 m3
Summary
To convert Gallon (US) to Cubic Meter, multiply the value in gal by the ratio of liters per gal divided by liters per m3. Equivalently: value_m3 = value_gal × (3.78541178 / 1000). Numerically, 1 gal equals 0.00378541178 m3.
Relationship context
You are converting between US customary fluid / volume (Gallons (US)) and metric (SI) (Cubic Meters). US and UK fluid measures differ (gallons, ounces, tablespoons); metric liters and cubic meters align with SI. The numeric factor used here is 3.785412e-3.
Conversion tables
| Gallon (US) (gal) | Cubic Meter (m3) |
|---|---|
| 0.1 | 0.0003785412 |
| 1 | 0.0037854118 |
| 2 | 0.0075708236 |
| 3 | 0.0113562353 |
| 4 | 0.0151416471 |
| 5 | 0.0189270589 |
| 6 | 0.0227124707 |
| 7 | 0.0264978825 |
| 8 | 0.0302832942 |
| 9 | 0.034068706 |
| Gallon (US) (gal) | Cubic Meter (m3) |
|---|---|
| 10 | 0.0378541178 |
| 20 | 0.0757082356 |
| 30 | 0.1135623534 |
| 40 | 0.1514164712 |
| 50 | 0.189270589 |
| 60 | 0.2271247068 |
| 70 | 0.2649788246 |
| 80 | 0.3028329424 |
| 90 | 0.3406870602 |
| 100 | 0.378541178 |
Conversions outside the hub list
The grid on the category page lists hub units only. These pairs include at least one unit outside that hub set (same tools: formulas and tables on each page).
- us-gallon to uk-gallonGallon (US) to Gallon (UK)
- us-gallon to uk-quartGallon (US) to Quart (UK)
- us-gallon to uk-pintGallon (US) to Pint (UK)
- us-gallon to us-quartGallon (US) to Quart (US)
- us-gallon to us-pintGallon (US) to Pint (US)
- us-gallon to uk-cupGallon (US) to Cup (UK)
- us-gallon to us-cupGallon (US) to Cup (US)
- us-gallon to uk-fluid-ounceGallon (US) to Fluid Ounce (UK)
- us-gallon to uk-tablespoonGallon (US) to Tablespoon (UK)
- us-gallon to uk-teaspoonGallon (US) to Teaspoon (UK)
- uk-gallon to cubic-meterGallon (UK) to Cubic Meter
- uk-quart to cubic-meterQuart (UK) to Cubic Meter