Gallon (US) to Cup (UK) Converter
Volume · unit-converter
Convert Gallon (US) to Cup (UK) with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use liter-based factors (US fluid measures, imperial UK units, SI cubic meters).
Calculator
From: Gallon (US) (gal)
To: Cup (UK) (ukcup)
About Gallon (US)
The US liquid gallon is defined as 231 cubic inches (about 3.78541 liters). US recipes, fuel economy, and retail liquids typically use US gallons.
About Cup (UK)
The UK metric cup is often taken as 250 ml in modern recipes, though traditional imperial cups differ; this converter uses the liter-based UK cup factor from the shared table.
How to convert gallons (us) to cups (uk)
1 gallon (us) is equal to 13.32278693998579 cup (uk):
1 gal = (3.78541178 L ÷ 0.284130625 L) ukcup = 13.32278693998579 ukcup
Each gallon (us) is defined as 3.78541178 L and each cup (uk) as 0.284130625 L, so one gal equals 3.78541178 ÷ 0.284130625 ukcup = 13.32278693998579 ukcup.
Let V(gal) be the numeric value of the same volume measured in Gallon (US) (gal), and V(ukcup) the value in Cup (UK) (ukcup). Then:
V(ukcup) = V(gal) × (3.78541178 / 0.284130625)
Equivalently, divide by how many gal fit into one ukcup (liters per ukcup divided by liters per gal):
V(ukcup) = V(gal) ÷ 0.07505937042337
Or: cup (uk) = gallon (us) ÷ 0.07505937042337
Examples
Example #1: Convert 20 gal to cup (uk)
20 gal = 20 gal × (3.78541178/0.284130625) ukcup = 266.4557388 ukcup
20 gal = 20 gal ÷ 0.07505937042337 = 266.4557388 ukcup
Example #2: Convert 50 gal to cup (uk)
50 gal = 50 gal × (3.78541178/0.284130625) ukcup = 666.139346999 ukcup
50 gal = 50 gal ÷ 0.07505937042337 = 666.139346999 ukcup
Summary
To convert Gallon (US) to Cup (UK), multiply the value in gal by the ratio of liters per gal divided by liters per ukcup. Equivalently: value_ukcup = value_gal × (3.78541178 / 0.284130625). Numerically, 1 gal equals 13.32278693998579 ukcup.
Relationship context
You are converting between US customary fluid / volume (Gallons (US)) and UK imperial fluid / volume (Cups (UK)). US and UK fluid measures differ (gallons, ounces, tablespoons); metric liters and cubic meters align with SI. The numeric factor used here is 1.332279e+1.
Conversion tables
| Gallon (US) (gal) | Cup (UK) (ukcup) |
|---|---|
| 0.1 | 1.332278694 |
| 1 | 13.32278694 |
| 2 | 26.64557388 |
| 3 | 39.96836082 |
| 4 | 53.2911477599 |
| 5 | 66.6139346999 |
| 6 | 79.9367216399 |
| 7 | 93.2595085799 |
| 8 | 106.58229552 |
| 9 | 119.90508246 |
| Gallon (US) (gal) | Cup (UK) (ukcup) |
|---|---|
| 10 | 133.2278694 |
| 20 | 266.4557388 |
| 30 | 399.6836082 |
| 40 | 532.911477599 |
| 50 | 666.139346999 |
| 60 | 799.367216399 |
| 70 | 932.595085799 |
| 80 | 1,065.8229552 |
| 90 | 1,199.0508246 |
| 100 | 1,332.278694 |