US fluid ounces to imperial fluid ounces converter
Convert US fluid ounces (fl oz (US)) to imperial fluid ounces (fl oz (UK)).
Volume converter
Instant conversion
Edit either value. Decimals and scientific notation supported.
1
fl oz (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.
1.040842731
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 fl oz (US) ≈ 1.040842731 fl oz (UK)
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAfl oz (UK) = fl oz (US) × 1.04084273078624
FORMULA & EXAMPLES
How to convert US fluid ounces to imperial fluid ounces
fl oz (UK) = fl oz (US) × 1.04084273078624
Multiply the fl oz (US) reading by 1.04084273078624.
Worked examples
1 fl oz (US) ≈ 1.040842731 fl oz (UK)
1 × 1.04084273078624 ≈ 1.040842731
8 fl oz (US) ≈ 8.326741846 fl oz (UK)
8 × 1.04084273078624 ≈ 8.326741846
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 fluid ounces to imperial fluid ounces table
Fixed reference · US fluid ounce 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 fluid ounce (fl oz (US))
Imperial fluid ounce (fl oz (UK))
0
0
0.1
0.1040842731
0.5
0.5204213654
1
1.040842731
2
2.081685462
5
5.204213654
10
10.40842731
25
26.02106827
50
52.04213654
100
104.0842731
1000
1040.842731
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.