US liquid gallons to imperial fluid ounces converter
Convert US liquid gallons (gal (US)) to imperial fluid ounces (fl oz (UK)).
Volume converter
Instant conversion
Edit either value. Decimals and scientific notation supported.
1
gal (US)
esc
LitreL
MillilitremL
Cubic metrem³
Cubic centimetrecm³
Cubic footft³
Cubic inchin³
US liquid gallongal (US)
Imperial gallongal (UK)
US fluid ouncefl oz (US)
Imperial fluid ouncefl oz (UK)
US customary cupcup (US)
Metric cupcup (metric)
US liquid pintpt (US)
US liquid quartqt (US)
Imperial pintpt (UK)
Imperial quartqt (UK)
US customary teaspoontsp (US)
US customary tablespoontbsp (US)
Metric teaspoon (5 mL)tsp (metric)
Metric tablespoon (15 mL)tbsp (metric)
Cubic yardyd³
Imperial gillgi (UK)
Imperial peckpk (UK)
Imperial bushelbu (UK)
Imperial fluid drachmfl dr (UK)
Imperial minimminim (UK)
No units found. Try a name or symbol.
133.2278695
fl oz (UK)
esc
LitreL
MillilitremL
Cubic metrem³
Cubic centimetrecm³
Cubic footft³
Cubic inchin³
US liquid gallongal (US)
Imperial gallongal (UK)
US fluid ouncefl oz (US)
Imperial fluid ouncefl oz (UK)
US customary cupcup (US)
Metric cupcup (metric)
US liquid pintpt (US)
US liquid quartqt (US)
Imperial pintpt (UK)
Imperial quartqt (UK)
US customary teaspoontsp (US)
US customary tablespoontbsp (US)
Metric teaspoon (5 mL)tsp (metric)
Metric tablespoon (15 mL)tbsp (metric)
Cubic yardyd³
Imperial gillgi (UK)
Imperial peckpk (UK)
Imperial bushelbu (UK)
Imperial fluid drachmfl dr (UK)
Imperial minimminim (UK)
No units found. Try a name or symbol.
CONVERSION
1 gal (US) ≈ 133.2278695 fl oz (UK)
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAfl oz (UK) = gal (US) × 133.227869540638
FORMULA & EXAMPLES
How to convert US liquid gallons to imperial fluid ounces
fl oz (UK) = gal (US) × 133.227869540638
Multiply the gal (US) reading by 133.227869540638.
Worked examples
1 gal (US) ≈ 133.2278695 fl oz (UK)
1 × 133.227869540638 ≈ 133.2278695
5 gal (US) ≈ 666.1393477 fl oz (UK)
5 × 133.227869540638 ≈ 666.1393477
Frequently asked questions
Why do UK and US capacity readings differ?
The Imperial gallon is 4.54609 L, while the US liquid gallon is 3.785411784 L. Each system has 8 pints and 4 quarts per gallon. An Imperial gallon contains 160 Imperial fluid ounces; a US gallon contains 128 US fluid ounces.
US liquid gallons to imperial fluid ounces table
Fixed reference · US liquid gallon to Imperial fluid ounce
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
US liquid gallon (gal (US))
Imperial fluid ounce (fl oz (UK))
0
0
0.1
13.32278695
0.5
66.61393477
1
133.2278695
2
266.4557391
5
666.1393477
10
1332.278695
25
3330.696739
50
6661.393477
100
13322.78695
1000
133227.8695
Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.