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Imperial gallons to Liters (gal (UK) to L)
Convert imperial gallons to liters: 1 gal (UK) = 4.54609 L. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 gal (UK) = 4.54609 L
liters = imperial gallons × 4.54609 — reverse: imperial gallons = liters × 0.2199692483
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 (UK) = 22.7305 L
- 12.5 gal (UK) = 56.8261 L
- 100 gal (UK) = 454.609 L
Imperial gallons to liters conversion table
| Imperial gallons (gal (UK)) | Liters (L) |
|---|---|
| 1 | 4.54609 |
| 2 | 9.09218 |
| 3 | 13.6383 |
| 4 | 18.1844 |
| 5 | 22.7305 |
| 6 | 27.2765 |
| 7 | 31.8226 |
| 8 | 36.3687 |
| 9 | 40.9148 |
| 10 | 45.4609 |
| 15 | 68.1913 |
| 20 | 90.9218 |
| 25 | 113.652 |
| 30 | 136.383 |
| 40 | 181.844 |
| 50 | 227.305 |
| 75 | 340.957 |
| 100 | 454.609 |
| 200 | 909.218 |
| 250 | 1136.52 |
| 500 | 2273.05 |
| 1000 | 4546.09 |
FAQ
How many liters are in one imperial gallon?
1 gal (UK) = 4.54609 L. 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 imperial gallons to liters?
Multiply the value in imperial gallons by 4.54609: liters = imperial gallons × 4.54609. For example, 5 gal (UK) = 22.7305 L.
How do I convert liters back to imperial gallons?
Multiply by the inverse factor 0.2199692483 (imperial gallons = liters × 0.2199692483), or use the liters-to-imperial gallons page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=gal_uk&to_unit=L - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"gal_uk","to_unit":"L"} - Markdown: https://tttkmbb.com/conversion/imperial-gallons-to-liters.md · JSON: https://tttkmbb.com/conversion/imperial-gallons-to-liters.json (add
?value=for a result) · Units: /api/v1/units?quantity=volume - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.