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US gallon to Imperial fluid ounce
Convert US gallon to Imperial fluid ounce and get the exact value instantly.
1 gal = 133.2278695 imp fl oz
About this conversion
To convert US gallon to Imperial fluid ounce, multiply the number of US gallon by 133.2278695.
Volume units divide between metric (liters, milliliters) and US customary (gallons, cups, fluid ounces), which trips up cooking, fuel figures and container sizing until you convert them.
Conversion table
| US gallon (gal) | Imperial fluid ounce (imp fl oz) |
|---|---|
| 1 gal | 133.2278695 imp fl oz |
| 2 gal | 266.4557391 imp fl oz |
| 5 gal | 666.1393477 imp fl oz |
| 10 gal | 1332.278695 imp fl oz |
| 100 gal | 13322.78695 imp fl oz |
How to use this converter
- Enter your US gallon value
Type any number into the US gallon field. It starts at 1 so you can read the rate straight away.
- Read the Imperial fluid ounce result
The amount in Imperial fluid ounce updates as you type, so there is no button to press and nothing to wait for.
- Swap or keep exploring
Use the swap control to flip the direction, or pick a related conversion from the list below.
Frequently asked
- How many Imperial fluid ounce are in one US gallon?
- One US gallon equals 133.2278695 imp fl oz. Enter any amount above to get an exact figure for your own value.
- Is this converter accurate?
- Yes. It uses the exact international definition of each unit and computes on your device, so the only rounding is for display.
- Do you upload the numbers I enter?
- No. The US gallon to Imperial fluid ounce conversion runs entirely in your browser tab, and nothing you type is sent to a server.
- Does it work on my phone?
- Yes. It runs in any modern mobile browser and keeps working offline once the page has loaded.
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