Convert imperial gallons (gal (UK)) to US customary cups (cup (US)).
Volume converter
Instant conversion
Edit either value. Decimals and scientific notation supported.
1
gal (UK)
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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.
19.21519881
cup (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.
CONVERSION
1 gal (UK) ≈ 19.21519881 cup (US)
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAcup (US) = gal (UK) × 19.2151988080777
FORMULA & EXAMPLES
How to convert Imperial gallons to US customary cups
cup (US) = gal (UK) × 19.2151988080777
Multiply the gal (UK) reading by 19.2151988080777.
Worked examples
1 gal (UK) ≈ 19.21519881 cup (US)
1 × 19.2151988080777 ≈ 19.21519881
5 gal (UK) ≈ 96.07599404 cup (US)
5 × 19.2151988080777 ≈ 96.07599404
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.
Imperial gallons to US customary cups table
Fixed reference · Imperial gallon to US customary cup
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
Imperial gallon (gal (UK))
US customary cup (cup (US))
0
0
0.1
1.921519881
0.5
9.607599404
1
19.21519881
2
38.43039762
5
96.07599404
10
192.1519881
25
480.3799702
50
960.7599404
100
1921.519881
1000
19215.19881
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.