Gallons to Cubic Meters Converter
Unit ConversionConvert gallons to cubic meters. 1 gallon equals exactly 0.003785411784 cubic meters, with a conversion table, worked examples and the reverse conversion.
Cubic Meters
Equivalent volume in cubic meters
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Unit Conversion calculators
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SponsoredThis converter turns gallons into cubic meters (gallons to m3). Enter a value and the result updates as you type. 1 gallon equals exactly 0.003785411784 cubic meters.
Pool, tank and water-use figures in US gallons often need to go into a metric spec, an export form or a utility bill in cubic meters. One US gallon is exactly 0.003785411784 cubic meter, so 264 gallons make up about one cubic meter.
The result is rounded to 6 decimal places, but the factor behind it never is, so long chains of conversions stay accurate. Type a whole number or a decimal; the conversion table below lists common values.
How to Convert Gallons to Cubic Meters
To convert gallons to cubic meters, multiply by 0.003785411784. For example, 2,000 gallons equals exactly 7.570823568 cubic meters.
To go from cubic meters back to gallons, divide by 0.003785411784. For example, 4 cubic meters is about 1,056.688209 gallons.
Gallons to Cubic Meters Conversion Table
Common values in gallons converted to cubic meters, rounded to 6 decimal places.
| Gallons | Cubic Meters |
|---|---|
| 1 gal | 0.003785 m³ |
| 5 gal | 0.018927 m³ |
| 10 gal | 0.037854 m³ |
| 55 gal | 0.208198 m³ |
| 100 gal | 0.378541 m³ |
| 264.172 gal | 1 m³ |
| 500 gal | 1.892706 m³ |
| 1,000 gal | 3.785412 m³ |
| 5,000 gal | 18.927059 m³ |
| 10,000 gal | 37.854118 m³ |
| 20,000 gal | 75.708236 m³ |
| 100,000 gal | 378.541178 m³ |
US and Imperial Gallons in Cubic Meters
A US gallon is exactly 0.003785411784 cubic meter and a UK imperial gallon exactly 0.00454609 cubic meter. The same 1,000 gallons is 3.7854 cubic meters in US gallons but about 4.5461 cubic meters in imperial gallons, so check which gallon a figure uses before converting. Several of the top search results for this conversion quietly use the imperial or the US dry gallon.
For a pool, the Round Pool Volume Calculator gives the volume from the diameter and depth, and the Pool Salt Calculator works out the salt for a saltwater system from that volume.
Frequently Asked Questions
How many cubic meters is 7 gallons?
About 0.0264979 cubic meters.
How many cubic meters is 12 gallons?
About 0.0454249 cubic meters.
How many cubic meters is 15 gallons?
0.05678117676 cubic meters.
How many cubic meters is 30 gallons?
0.11356235352 cubic meters.
How many cubic meters is a 55 gallon drum?
55 gallons equals exactly 0.20819764812 cubic meters, about a fifth of a cubic meter.
What happens if I enter a negative number?
The result shows a dash. A volume is an amount of space, so it is never below zero; a minus sign in front of a value is usually a typing slip.
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