US Gallons to Imperial Gallons
Snapshot
1 US Gallon equals 0.832674 Imperial Gallons. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.
- Reference basis: This result uses fixed marine-capacity definitions for tanks, holds, and onboard volume checks.
- Example: For 2 US Gallon, the result equals 1.665348 Imperial Gallons.
- Use the reverse page if you need the opposite direction with the same basis.
Use the interactive calculator below for custom values and the common-value table for quick checks.
Converter Calculator
0.832674 Imperial Gallons (Imp gal)
SwitchExplanation
Formula: Imperial Gallons = US Gallon × 0.832674. Why: tank and hold-capacity units are tied to fixed volume definitions, so the route normalizes through one volumetric basis before applying the target unit.
US Gallons (US gal): a US customary liquid-volume unit used for fuel, tanks, and onboard capacity references in US-based contexts.
Imperial Gallons (Imp gal): a UK imperial liquid-volume unit used in some marine and fuel-capacity references.
This route is useful when translating tank, hold, and onboard liquid-capacity values across metric and gallon-based systems for storage, fueling, and vessel operations.
This conversion is purely multiplicative because both units reduce through one fixed marine reference basis for the active family, with no offset.
Common Conversion Values
| US Gallon (US gal) | Imperial Gallons (Imp gal) |
|---|---|
| 1 | 0.832674 |
| 2 | 1.665348 |
| 5 | 4.163371 |
| 10 | 8.326742 |
| 20 | 16.653484 |
| 50 | 41.633709 |
| 100 | 83.267418 |
Frequently Asked Questions
How many imperial gallons are in 1 us gallon?
This route uses a fixed factor, so 1 us gallon equals 0.832674184629 imperial gallons.
What is the reverse conversion for US Gallons to Imperial Gallons?
Use the Imperial Gallons to US Gallons page to reverse the same tank or hold-capacity relationship for onboard volume checks.
Can I use decimal us gallons values?
Yes. Decimal us gallons values are supported for fueling, storage, and onboard capacity checks.