Convert US Gallon to Imperial Peck
Convert us gallons to imperial pecks instantly. 1 us gallon = 0.4163370923 imperial peck — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Imperial Peck to US Gallon converter for the reverse conversion.
Units explained
US Gallon
The US liquid gallon is defined as exactly 231 cubic inches (3.785411784 liters).
Based on the English wine gallon of 231 cubic inches, retained by the US after 1824.
The primary US unit for fuel, milk and large beverage containers.
English wine gallon; US since 1824.
Imperial Peck
An imperial peck is 2 imperial gallons (9.09218 L).
A British dry/liquid measure.
Historical produce measure.
UK customary.
US Gallon to Imperial Peck conversion formula
The relationship between us gallons and imperial pecks:
To convert us gallons to imperial pecks, multiply the value in us gallons by 0.4163370923. To reverse, multiply imperial pecks by 2.401899851.
How to use this converter
Type a value into the calculator. The result in imperial pecks 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 Peck to US Gallon converter for the reverse direction.
Step-by-step: convert us gallons to imperial pecks
- Write down the value in us gallons (gal).
- Multiply that value by the factor 0.4163370923.
- The product is the equivalent value in imperial pecks (pk).
- To reverse, multiply the imperial peck value by 2.401899851.
Worked examples
Example 1 — Convert 1 gal to pk:
1 × 0.4163370923 = 0.4163370923 pk
Example 2 — Convert 100 gal to pk:
100 × 0.4163370923 = 41.6337092314 pk
Real-world example — Postcard and small-object dimensions
A postcard is about 5 us gallons wide. Converting to imperial pecks is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 gal × 0.4163370923 = 2.0816854616 pk
Real-world example — Ruler-scale measurements
A 30-us gallon school ruler converts cleanly to imperial pecks — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 gal × 0.4163370923 = 12.4901127694 pk
Real-world example — Hardware-scale dimensions
A 10-us gallon fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between us gallons and imperial pecks daily when mixing metric and imperial tools.
10 gal × 0.4163370923 = 4.1633709231 pk
US Gallon to Imperial Peck conversion table
Standard reference values for converting us gallons to imperial pecks:
| US Gallon [gal] | Imperial Peck [pk] |
|---|---|
| 0.01 | 0.0041633709 |
| 0.1 | 0.0416337092 |
| 1 | 0.4163370923 |
| 2 | 0.8326741846 |
| 3 | 1.2490112769 |
| 4 | 1.6653483693 |
| 5 | 2.0816854616 |
| 10 | 4.1633709231 |
| 20 | 8.3267418463 |
| 30 | 12.4901127694 |
| 40 | 16.6534836926 |
| 50 | 20.8168546157 |
| 100 | 41.6337092314 |
| 500 | 208.1685461572 |
| 1000 | 416.3370923145 |
Frequently asked questions
How many imperial pecks is 1 us gallon?
How do I convert us gallons to imperial pecks?
How do I convert imperial pecks back to us gallons?
How many imperial pecks is 100 us gallons?
Popular volume unit conversions
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Metric / SI (15 units)
US Customary (Liquid) (14 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 0.4163370923 pk) 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.