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US gallons to Cubic meters (gal (US) to m³)
Convert US gallons to cubic meters: 1 gal (US) = 0.00378541 m³. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 gal (US) = 0.00378541 m³
cubic meters = US gallons × 0.003785411784 — reverse: US gallons = cubic meters × 264.1720524
The factor is derived from the SI definitions of both units (base unit: L) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 gal (US) = 0.0189271 m³
- 12.5 gal (US) = 0.0473176 m³
- 100 gal (US) = 0.378541 m³
US gallons to cubic meters conversion table
| US gallons (gal (US)) | Cubic meters (m³) |
|---|---|
| 1 | 0.00378541 |
| 2 | 0.00757082 |
| 3 | 0.0113562 |
| 4 | 0.0151416 |
| 5 | 0.0189271 |
| 6 | 0.0227125 |
| 7 | 0.0264979 |
| 8 | 0.0302833 |
| 9 | 0.0340687 |
| 10 | 0.0378541 |
| 15 | 0.0567812 |
| 20 | 0.0757082 |
| 25 | 0.0946353 |
| 30 | 0.113562 |
| 40 | 0.151416 |
| 50 | 0.189271 |
| 75 | 0.283906 |
| 100 | 0.378541 |
| 200 | 0.757082 |
| 250 | 0.946353 |
| 500 | 1.89271 |
| 1000 | 3.78541 |
FAQ
How many cubic meters are in one gallon?
1 gal (US) = 0.00378541 m³. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.
What is the formula to convert US gallons to cubic meters?
Multiply the value in US gallons by 0.003785411784: cubic meters = US gallons × 0.003785411784. For example, 5 gal (US) = 0.0189271 m³.
How do I convert cubic meters back to US gallons?
Multiply by the inverse factor 264.1720524 (US gallons = cubic meters × 264.1720524), or use the cubic meters-to-US gallons page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=gal_us&to_unit=m3 - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"gal_us","to_unit":"m3"} - Markdown: https://tttkmbb.com/conversion/gallons-to-cubic-meters.md · JSON: https://tttkmbb.com/conversion/gallons-to-cubic-meters.json (add
?value=for a result) · Units: /api/v1/units?quantity=volume - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.