Gallon to Cubic meter Converter
Enter the value that you want to convert gallon (gal) to cubic meter (m³) or cubic meter to gallon.Also written as GAL to M³ conversion.
1 gallon = 0.0037854 cubic meter
Formula: cubic meter = gallon value × 0.0037854
GAL to M³ — gallon to cubic meter
10 gallon = 0.03785 cubic meter
Popular Volume Converters:
How Gallon Relates to Cubic meter
The Gallon Explained
Gallon (gal) is a unit of volume measurement. 1 gallon is equal to 0.0037854 cubic meter.
The Cubic meter Explained
Cubic meter (m³) is a unit of volume measurement. 1 cubic meter is equal to 264.1720524 gallon.
Volume Measurement Systems
Volume units are particularly confusing because the US and UK gallons differ (US gallon = 3.785 L, UK gallon = 4.546 L), as do their pints, cups, and fluid ounces. Cooking, fuel economy, beverage production, and pharmaceutical compounding all require precise volume conversions. Laboratory work uses milliliters and liters while US recipes specify cups, tablespoons, and fluid ounces.
gallon to cubic meter metric conversion table
| 0.01 gal | = | 0.00004 m³ |
| 0.1 gal | = | 0.00038 m³ |
| 1 gal | = | 0.00379 m³ |
| 2 gal | = | 0.00757 m³ |
| 3 gal | = | 0.01136 m³ |
| 4 gal | = | 0.01514 m³ |
| 5 gal | = | 0.01893 m³ |
| 6 gal | = | 0.02271 m³ |
| 7 gal | = | 0.02650 m³ |
| 8 gal | = | 0.03028 m³ |
| 9 gal | = | 0.03407 m³ |
| 10 gal | = | 0.03785 m³ |
| 11 gal | = | 0.04164 m³ |
| 12 gal | = | 0.04542 m³ |
| 13 gal | = | 0.04921 m³ |
| 14 gal | = | 0.05300 m³ |
| 15 gal | = | 0.05678 m³ |
| 16 gal | = | 0.06057 m³ |
| 17 gal | = | 0.06435 m³ |
| 18 gal | = | 0.06814 m³ |
| 19 gal | = | 0.07192 m³ |
| 20 gal | = | 0.07571 m³ |
| 30 gal | = | 0.11356 m³ |
| 40 gal | = | 0.15142 m³ |
| 50 gal | = | 0.18927 m³ |
| 60 gal | = | 0.22712 m³ |
| 70 gal | = | 0.26498 m³ |
| 80 gal | = | 0.30283 m³ |
| 90 gal | = | 0.34069 m³ |
| 100 gal | = | 0.37854 m³ |
| 200 gal | = | 0.75708 m³ |
| 300 gal | = | 1.13562 m³ |
| 400 gal | = | 1.51416 m³ |
| 500 gal | = | 1.89271 m³ |
| 600 gal | = | 2.27125 m³ |
| 700 gal | = | 2.64979 m³ |
| 800 gal | = | 3.02833 m³ |
| 900 gal | = | 3.40687 m³ |
| 1000 gal | = | 3.78541 m³ |
How to Convert GAL to M³ (Gallon to Cubic meter)?
We can convert gallon to cubic meter by using an example.
Example:
Convert 20 Gallon to Cubic meter?
We know 1 Gallon = 0.0037854 cubic meter; 1 Cubic meter = 264.1720524 gallon.
20 gallon = ___m³
20 × 0.0037854 = 0.07571 m³ (we know 1 gallon = 0.0037854 cubic meter)
Answer:
20 gallon = 0.07571 cubic meter
US Gallons to Cubic Meters: Converting Between Systems
One US gallon equals 0.00378541 cubic meters (approximately 3.785 liters ÷ 1,000). This conversion bridges the US customary system and the SI metric system, and is critical for water resource management, international trade of liquids, and engineering calculations that require SI-consistent volume units.
- Identify the volume in US gallons.
- Multiply by 0.00378541 (or 3.78541 × 10⁻³).
- The result is the volume in cubic meters.
- Example: 100 gallons × 0.00378541 = 0.378541 m³.
Gallons to Cubic Meters — Water & Industrial Reference
Common gallon volumes expressed in cubic meters for engineering and water management:
| Gallon | Cubic meter |
|---|---|
| 1 gal | 0.003785 m³ |
| 10 gal | 0.03785 m³ |
| 50 gal | 0.1893 m³ |
| 100 gal | 0.3785 m³ |
| 264.17 gal | 1 m³ |
| 500 gal | 1.893 m³ |
| 1,000 gal | 3.785 m³ |
| 10,000 gal | 37.85 m³ |
Solved Examples: Gallons to m³
Question 1: A household uses 5,000 gallons of water per month. Express in cubic meters.
Solution:
m³ = gallons × 0.00378541
= 5,000 × 0.00378541
= 18.927 m³
Answer: 5,000 gallons = 18.93 m³ of water per month.
Question 2: A 15,000-gallon swimming pool needs to be described in cubic meters for an engineering report.
Solution:
m³ = 15,000 × 0.00378541
= 56.78 m³
Answer: 15,000 gallons = 56.78 m³.
Question 3: A rain barrel collects 55 gallons. What volume in m³ for a stormwater calculation?
Solution:
m³ = 55 × 0.00378541
= 0.2082 m³
Answer: 55 gallons = 0.208 m³ (208 liters).
Practice Questions
Try solving these on your own to test your understanding:
- Convert 200 gallons to m³. (Answer: 0.757 m³)
- How many m³ is 750 gallons? (Answer: 2.839 m³)
- A tank holds 2,000 gallons. Express in m³. (Answer: 7.571 m³)
- How many gallons make 5 m³? (Answer: 1,320.86 gallons)
- Convert 1 gallon to liters and then to m³. (Answer: 3.785 L = 0.003785 m³)
Water Utility Billing: Gallons vs. Cubic Meters
US water utilities typically bill in gallons or CCF (100 cubic feet = 748 gallons = 2.832 m³), while international utilities use cubic meters. Converting between them is necessary for global water consumption comparisons. The global average is about 3.8 m³/person/month (≈1,000 gallons), while the US average is much higher at around 11.4 m³/person/month (≈3,000 gallons).
Environmental Engineering Applications
Environmental engineers converting between gallons and m³ work with stormwater runoff, wastewater treatment plant capacities, and reservoir volumes. A treatment plant processing 1 million gallons per day (MGD) handles 3,785 m³/day. Rain falling on a 1,000 ft² roof during a 1-inch storm event ≈ 623 gallons ≈ 2.36 m³. These conversions feed into infrastructure design calculations.
Key Takeaways
- 1 US gallon = 0.00378541 m³.
- Multiply gallons by 0.003785 to get m³.
- 264.17 gallons = 1 cubic meter.
- Quick estimate: gallons × 4 ÷ 1000 ≈ m³ (within 5.7%).
- 1 MGD (million gallons/day) = 3,785 m³/day.
- Used in water resources, environmental engineering, and international trade.
Gallon to Cubic meter Conversion Formula
cubic meter = gallon × 0.0037854
1 gallon = 0.0037854 cubic meter
1 cubic meter = 264.1720524 gallon
Reverse: gallon = cubic meter × 264.1720524
Frequently Asked Questions
How many cubic meter are in 1 gallon?
There are 0.0037854 cubic meter in 1 gallon. To convert gallon to cubic meter, multiply the value by 0.0037854.
How do I convert gallon to cubic meter?
Multiply your gallon value by 0.0037854 to get the equivalent in cubic meter. For example, 5 gallon = 5 × 0.0037854 = 0.01893 cubic meter.
How do I convert cubic meter to gallon?
Multiply your cubic meter value by 264.1720524 to get the equivalent in gallon. Alternatively, divide by 0.0037854.
What is 10 gallon in cubic meter?
10 gallon is equal to 0.03785 cubic meter.
What is 100 gallon in cubic meter?
100 gallon is equal to 0.37854 cubic meter.