Convert US customary cups (cup (US)) to imperial gallons (gal (UK)).
Volume converter
Instant conversion
Edit either value. Decimals and scientific notation supported.
1
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.
0.05204213654
gal (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 cup (US) ≈ 0.05204213654 gal (UK)
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAgal (UK) = cup (US) × 0.0520421365393118
FORMULA & EXAMPLES
How to convert US customary cups to imperial gallons
gal (UK) = cup (US) × 0.0520421365393118
Multiply the cup (US) reading by 0.0520421365393118.
Worked examples
1 cup (US) ≈ 0.05204213654 gal (UK)
1 × 0.0520421365393118 ≈ 0.05204213654
16 cup (US) ≈ 0.8326741846 gal (UK)
16 × 0.0520421365393118 ≈ 0.8326741846
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 customary cups to imperial gallons table
Fixed reference · US customary cup to Imperial gallon
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
US customary cup (cup (US))
Imperial gallon (gal (UK))
0
0
0.1
0.005204213654
0.5
0.02602106827
1
0.05204213654
2
0.1040842731
5
0.2602106827
10
0.5204213654
25
1.301053413
50
2.602106827
100
5.204213654
1000
52.04213654
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.