Convert Imperial Fluid Ounce to Imperial Quart
Convert imperial fluid ounces to imperial quarts instantly. 1 imperial fluid ounce = 0.025 imperial quart — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Imperial Quart to Imperial Fluid Ounce converter for the reverse conversion.
Units explained
Imperial Fluid Ounce
An imperial fluid ounce is 1/160 of an imperial gallon (28.4131 mL).
Defined so that ten fluid ounces make an imperial half-pint.
Used in UK and Commonwealth recipes and labels.
UK, 1824.
Imperial Quart
An imperial quart is one quarter of an imperial gallon (1.13652 L).
A subdivision of the 1824 imperial gallon.
Used in the UK and Commonwealth.
UK, 1824.
Imperial Fluid Ounce to Imperial Quart conversion formula
The relationship between imperial fluid ounces and imperial quarts:
To convert imperial fluid ounces to imperial quarts, multiply the value in imperial fluid ounces by 0.025. To reverse, multiply imperial quarts by 40.
How to use this converter
Type a value into the calculator. The result in imperial quarts 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 Quart to Imperial Fluid Ounce converter for the reverse direction.
Step-by-step: convert imperial fluid ounces to imperial quarts
- Write down the value in imperial fluid ounces (fl oz).
- Multiply that value by the factor 0.025.
- The product is the equivalent value in imperial quarts (qt).
- To reverse, multiply the imperial quart value by 40.
Worked examples
Example 1 — Convert 1 fl oz to qt:
1 × 0.025 = 0.025 qt
Example 2 — Convert 100 fl oz to qt:
100 × 0.025 = 2.5 qt
Real-world example — Packaging gauge
A 4-imperial fluid ounce plastic bag thickness is a common spec for grocery and freezer bags. Converting from imperial fluid ounces to imperial quarts is what packaging buyers do whenever they bridge US and metric supplier quotes.
4 fl oz × 0.025 = 0.1 qt
Real-world example — Plastic film and laminate thickness
A 500-imperial fluid ounce sheet is a typical spec for ID-card laminates and film overlays. Converting to imperial quarts aligns the value with the unit most CAD systems and material datasheets prefer.
500 fl oz × 0.025 = 12.5 qt
Imperial Fluid Ounce to Imperial Quart conversion table
Standard reference values for converting imperial fluid ounces to imperial quarts:
| Imperial Fluid Ounce [fl oz] | Imperial Quart [qt] |
|---|---|
| 0.01 | 0.00025 |
| 0.1 | 0.0025 |
| 1 | 0.025 |
| 2 | 0.05 |
| 3 | 0.075 |
| 4 | 0.1 |
| 5 | 0.125 |
| 10 | 0.25 |
| 20 | 0.5 |
| 30 | 0.75 |
| 40 | 1 |
| 50 | 1.25 |
| 100 | 2.5 |
| 500 | 12.5 |
| 1000 | 25 |
Frequently asked questions
How many imperial quarts is 1 imperial fluid ounce?
How do I convert imperial fluid ounces to imperial quarts?
How do I convert imperial quarts back to imperial fluid ounces?
How many imperial quarts is 100 imperial fluid ounces?
Popular volume unit conversions
Convert Imperial Fluid Ounce to other volume units
Show all Imperial Fluid Ounce conversions
Metric / SI (8 units)
US Customary (Liquid) (8 units)
Imperial (UK) (3 units)
Cubic (length-derived) (3 units)
Sources & references
Conversion factor (1 fl oz = 0.025 qt) 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.