Convert Imperial Gallons to Cubic Inches
Convert Imperial Gallons (UK gal) to Cubic Inches (in³) instantly and accurately.
Conversion Formula
in³ = UK gal × 277.4194328
About Imperial Gallons
A US imperial gallon (UK gal) = exactly 8 imperial pints or 10 lb of pure water at 62°F ≈ 4.546 L - about 20% larger than the US liquid gallon (3.785 L). The weight-based definition made it verifiable with simple scales. Still the legal fuel measure in the Cayman Islands and other British Overseas Territories. UK mpg ratings use imperial gallons: 50 UK mpg ≈ 42 US mpg. 1 UK gal ≈ 4.546 L.
About Cubic Inches
A cubic inch (in³) is the volume of a cube with sides of one inch (25.4 mm), equal to approximately 16.387 mL. It is widely used in US engineering and manufacturing - engine displacement was traditionally described in cubic inches (a 350 in³ V8 engine displaces 5.7 liters), and product specifications for items sold in the US frequently reference cubic inches. Speaker cabinet volumes, wine bottle capacities in older US standards, refrigerator compartment sizes, and box shipping calculations in imperial units all use cubic inches. One liter equals approximately 61.024 cubic inches.
Quick Reference Table
| Imperial Gallons (UK gal) | Cubic Inches (in³) |
|---|---|
| 1 UK gal | 277.419 in³ |
| 2 UK gal | 554.839 in³ |
| 5 UK gal | 1387.1 in³ |
| 10 UK gal | 2774.19 in³ |
| 25 UK gal | 6935.49 in³ |
| 50 UK gal | 13871 in³ |
| 100 UK gal | 27741.9 in³ |