UK gallons to cubic metres – convert gal (UK) to m³
Convert UK gallons to cubic metres (gal UK to m³) to translate legacy tank, fuel or water volumes into modern metric units used in engineering, billing and design.
Open the interactive gal (UK) → m³ converter:
Use main converter (UK gal → m³) or switch to m³ → UK galThe volume converter also supports litres, millilitres, US gallons, cubic metres and cubic feet.
Quick reference: UK gallons to m³
One UK gallon equals 0.00454609 m³. So: m³ = gal(UK) × 0.00454609. Examples:
| Volume (UK gallons) | Volume (m³, approx.) |
|---|---|
| 1 UK gal | 0.00455 m³ |
| 5 UK gal | 0.02273 m³ |
| 10 UK gal | 0.04546 m³ |
| 50 UK gal | 0.2273 m³ |
| 100 UK gal | 0.4546 m³ |
| 250 UK gal | 1.1365 m³ |
Why convert UK gallons to cubic metres?
UK gal to m³ is useful when you:
- Convert old imperial tank sizes into metric for upgrades or inspections.
- Compare water or fuel storage with flow rates given in m³/h.
- Design or check civil engineering and plumbing systems.
- Standardise brewery, distillery or agricultural volumes across units.
Other volume converters on this site
Remember that UK gallons are different from US gallons – this page uses the UK (imperial) definition only.
Page last updated: 4 December 2025.