Convert Imperial Gallon to US Gill
Convert imperial gallons to us gills instantly. 1 imperial gallon = 38.4303976162 us gill — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Gill 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.
US Gill
A US gill is one quarter of a US pint (118.294 mL).
An old English unit for small servings of liquor.
Largely historical; survives in some bartending and pharmacy contexts.
English customary.
Imperial Gallon to US Gill conversion formula
The relationship between imperial gallons and us gills:
To convert imperial gallons to us gills, multiply the value in imperial gallons by 38.4303976162. To reverse, multiply us gills by 0.0260210683.
How to use this converter
Type a value into the calculator. The result in us gills updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Gill to Imperial Gallon converter for the reverse direction.
Step-by-step: convert imperial gallons to us gills
- Write down the value in imperial gallons (gal).
- Multiply that value by the factor 38.4303976162.
- The product is the equivalent value in us gills (gi).
- To reverse, multiply the us gill value by 0.0260210683.
Worked examples
Example 1 — Convert 1 gal to gi:
1 × 38.4303976162 = 38.4303976162 gi
Example 2 — Convert 100 gal to gi:
100 × 38.4303976162 = 3843.0397616155 gi
Real-world example — Adjacent small-scale precision
One imperial gallon equals 1,000 us gills — 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 × 38.4303976162 = 38.4303976162 gi
Real-world example — Adjacent metric sub-units
One imperial gallon equals 1,000 us gills. Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 gal × 38.4303976162 = 38.4303976162 gi
Imperial Gallon to US Gill conversion table
Standard reference values for converting imperial gallons to us gills:
| Imperial Gallon [gal] | US Gill [gi] |
|---|---|
| 0.01 | 0.3843039762 |
| 0.1 | 3.8430397616 |
| 1 | 38.4303976162 |
| 2 | 76.8607952323 |
| 3 | 115.2911928485 |
| 4 | 153.7215904646 |
| 5 | 192.1519880808 |
| 10 | 384.3039761616 |
| 20 | 768.6079523231 |
| 30 | 1152.9119284847 |
| 40 | 1537.2159046462 |
| 50 | 1921.5198808078 |
| 100 | 3843.0397616155 |
| 500 | 19215.1988080777 |
| 1000 | 38430.3976161554 |
Frequently asked questions
How many us gills is 1 imperial gallon?
How do I convert imperial gallons to us gills?
How do I convert us gills back to imperial gallons?
How many us gills is 100 imperial gallons?
Popular volume unit conversions
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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 = 38.4303976162 gi) 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.