Convert Imperial Gallon to Imperial Cup
Convert imperial gallons to imperial cups instantly. 1 imperial gallon = 16 imperial cup — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Imperial Cup to Imperial Gallon converter for the reverse conversion.
Units explained
Imperial Gallon
The imperial gallon is defined as exactly 4.54609 liters.
Set by the British Weights and Measures Act of 1824 as the volume of 10 lb of water.
Used for fuel and beverages in the UK and Commonwealth.
UK, 1824.
Imperial Cup
An imperial cup is half an imperial pint (284.131 mL).
A British cooking measure.
Used in older British and Commonwealth recipes.
UK cooking measure.
Imperial Gallon to Imperial Cup conversion formula
The relationship between imperial gallons and imperial cups:
To convert imperial gallons to imperial cups, multiply the value in imperial gallons by 16. To reverse, multiply imperial cups by 0.0625.
How to use this converter
Type a value into the calculator. The result in imperial cups updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Imperial Cup to Imperial Gallon converter for the reverse direction.
Step-by-step: convert imperial gallons to imperial cups
- Write down the value in imperial gallons (gal).
- Multiply that value by the factor 16.
- The product is the equivalent value in imperial cups (cup).
- To reverse, multiply the imperial cup value by 0.0625.
Worked examples
Example 1 — Convert 1 gal to cup:
1 × 16 = 16 cup
Example 2 — Convert 100 gal to cup:
100 × 16 = 1600 cup
Real-world example — Adjacent small-scale precision
One imperial gallon equals 1,000 imperial cups — the standard sub-millimeter precision conversion that materials engineers use whenever they switch between bulk material thickness specs (larger unit) and surface-finish characteristics (smaller unit).
1 gal × 16 = 16 cup
Real-world example — Adjacent metric sub-units
One imperial gallon equals 1,000 imperial cups. Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 gal × 16 = 16 cup
Imperial Gallon to Imperial Cup conversion table
Standard reference values for converting imperial gallons to imperial cups:
| Imperial Gallon [gal] | Imperial Cup [cup] |
|---|---|
| 0.01 | 0.16 |
| 0.1 | 1.6 |
| 1 | 16 |
| 2 | 32 |
| 3 | 48 |
| 4 | 64 |
| 5 | 80 |
| 10 | 160 |
| 20 | 320 |
| 30 | 480 |
| 40 | 640 |
| 50 | 800 |
| 100 | 1600 |
| 500 | 8000 |
| 1000 | 16000 |
Frequently asked questions
How many imperial cups is 1 imperial gallon?
How do I convert imperial gallons to imperial cups?
How do I convert imperial cups back to imperial gallons?
How many imperial cups is 100 imperial gallons?
Popular volume unit conversions
Convert Imperial Gallon to other volume units
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Metric / SI (15 units)
US Customary (Liquid) (15 units)
US Customary (Dry) (5 units)
Imperial (UK) (13 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 16 cup) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.