Convert Imperial Quart to US Quart
Convert imperial quarts to us quarts instantly. 1 imperial quart = 1.2009499255 us quart — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Quart to Imperial Quart converter for the reverse conversion.
Units explained
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.
US Quart
A US liquid quart is one quarter of a US gallon (0.946352946 L).
From the Latin quartus, a quarter of a gallon.
Used for milk, oil and household liquids in the US.
English customary.
Imperial Quart to US Quart conversion formula
The relationship between imperial quarts and us quarts:
To convert imperial quarts to us quarts, multiply the value in imperial quarts by 1.2009499255. To reverse, multiply us quarts by 0.8326741846.
How to use this converter
Type a value into the calculator. The result in us 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 US Quart to Imperial Quart converter for the reverse direction.
Step-by-step: convert imperial quarts to us quarts
- Write down the value in imperial quarts (qt).
- Multiply that value by the factor 1.2009499255.
- The product is the equivalent value in us quarts (qt).
- To reverse, multiply the us quart value by 0.8326741846.
Worked examples
Example 1 — Convert 1 qt to qt:
1 × 1.2009499255 = 1.2009499255 qt
Example 2 — Convert 100 qt to qt:
100 × 1.2009499255 = 120.0949925505 qt
Real-world example — Adjacent metric sub-units
One imperial quart equals 1,000 us quarts. Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 qt × 1.2009499255 = 1.2009499255 qt
Real-world example — Adjacent small-scale precision
One imperial quart equals 1,000 us quarts — 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 qt × 1.2009499255 = 1.2009499255 qt
Imperial Quart to US Quart conversion table
Standard reference values for converting imperial quarts to us quarts:
| Imperial Quart [qt] | US Quart [qt] |
|---|---|
| 0.01 | 0.0120094993 |
| 0.1 | 0.1200949926 |
| 1 | 1.2009499255 |
| 2 | 2.401899851 |
| 3 | 3.6028497765 |
| 4 | 4.803799702 |
| 5 | 6.0047496275 |
| 10 | 12.009499255 |
| 20 | 24.0189985101 |
| 30 | 36.0284977651 |
| 40 | 48.0379970202 |
| 50 | 60.0474962752 |
| 100 | 120.0949925505 |
| 500 | 600.4749627524 |
| 1000 | 1200.9499255049 |
Frequently asked questions
How many us quarts is 1 imperial quart?
How do I convert imperial quarts to us quarts?
How do I convert us quarts back to imperial quarts?
How many us quarts is 100 imperial quarts?
Popular volume unit conversions
Convert Imperial Quart to other volume units
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Metric / SI (8 units)
US Customary (Liquid) (8 units)
Imperial (UK) (3 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (3 units)
Sources & references
Conversion factor (1 qt = 1.2009499255 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.