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Convert US quarts to Imperial quarts

1 US quart is 0.83 qt (UK). One US quart is exactly 0.832674184629 imperial quarts.

One US quart is 0.83267418 imperial quarts. To convert US quarts to imperial quarts, multiply by 0.83267418; to go the other way, divide by 0.83267418 or multiply by 1.2009499. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 130. Two pints, about 946 ml, and close enough to a liter that recipes swap them.

Factor checked against the defining standard · How we check

Imperial quarts
0.83 qt (UK)
US quarts × 0.83267418
1 * 0.83267420.833 qt (UK)

1 US quart in every volume unit

1 US quart expressed in every volume unit
UnitValueExact factor
US teaspoons192 tsp× 192
US tablespoons64 tbsp× 64
US fluid ounces32 fl oz× 32
US cups4 cup× 4
US pints2 pt× 2
US quarts (as entered)1 qt—
US gallons0.25 gal× 0.25
milliliters946.352946 ml× 946.352946
liters0.946352946 L× 0.946352946
imperial gallons0.2081685462 gal (UK)× 0.208168546157
imperial quarts0.8326741846 qt (UK)× 0.832674184629
imperial pints1.665348369 pt (UK)× 1.66534836926
imperial fluid ounces33.30696739 fl oz (UK)× 33.3069673852
imperial gills6.661393477 gi (UK)× 6.66139347703
cubic millimetres946,352.946 mm³× 946,352.946
cubic centimetres946.352946 cm³× 946.352946
cubic inches57.75 in³× 57.75
cubic feet0.03342013889 ft³× 0.0334201388889
cubic yards0.001237782922 yd³× 0.00123778292181
cubic metres0.000946352946 m³× 0.000946352946

Factors are entered by hand from NIST Handbook 130 rather than derived from a units library, so the ones that terminate are exact rather than rounded.

How do you convert US quarts to imperial quarts? The converter and the working

  1. 1.Take the measurement in US quarts.
  2. 2.Multiply by 0.83267418 — that is how many imperial quarts fit in one US quart.
  3. 3.To go back the other way, divide by 0.83267418, or multiply by 1.2009499.

Worked example: 25 US quarts to imperial quarts

Formula
qt × 0.83267418 = qt (UK)
Arithmetic
25 × 0.83267418 = 20.82 qt (UK)
Answer
25 qt = 20.82 qt (UK)

The factor is rounded for display; the figure above is computed from the full value.

US quarts to imperial quarts conversion table

US quarts to imperial quarts conversion table
US quartsImperial quarts
1 qt0.83 qt (UK)
2 qt1.67 qt (UK)
3 qt2.5 qt (UK)
4 qt3.33 qt (UK)
5 qt4.16 qt (UK)
6 qt5 qt (UK)
7 qt5.83 qt (UK)
8 qt6.66 qt (UK)
9 qt7.49 qt (UK)
10 qt8.33 qt (UK)
12 qt9.99 qt (UK)
15 qt12.49 qt (UK)
20 qt16.65 qt (UK)
25 qt20.82 qt (UK)
50 qt41.63 qt (UK)
100 qt83.27 qt (UK)
200 qt166.53 qt (UK)
300 qt249.8 qt (UK)
500 qt416.34 qt (UK)
1000 qt832.67 qt (UK)
2000 qt1,665.35 qt (UK)
5000 qt4,163.37 qt (UK)
10000 qt8,326.74 qt (UK)

Both quarts are a quarter of a gallon, and the gallons are different

The imperial quart is 1.1365225 liters and the US quart is 0.946352946 — the same 20% gap as the gallons they come from. A US quart is close enough to a liter for a recipe to swap them; an imperial quart is not, and treating one as the other overfills by about 14%.

NIST Handbook 44, Appendix C — general tables of units of measurement

What is a US quart?

Two pints, about 946 ml, and close enough to a liter that recipes swap them.

What is an imperial quart?

A quarter of an imperial gallon, 1.1365225 liters exactly. It is larger than a US quart by the same fifth that separates the two gallons.

How many imperial quarts are in a US quart?

One US quart is 0.83267418 imperial quarts. Going the other way, one imperial quart is 1.2009499 US quarts. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.

Every volume unit here

The whole group — 20 units with their symbols and the size of each one in liters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a US quart.

Source: NIST Handbook 130 — US customary liquid measure

Cite this page

APA
Rule Calculator. (2026). Convert US quarts to imperial quarts. Rule Calculator. https://rulecalculators.com/convert/quart-to-imperial-quart
MLA
"Convert US quarts to imperial quarts." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/quart-to-imperial-quart.
Chicago
Rule Calculator. "Convert US quarts to imperial quarts." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/quart-to-imperial-quart.

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Questions people actually ask

How many imperial quarts are in a US quart?
0.83267418. A quarter of an imperial gallon, 1.1365225 liters exactly. It is larger than a US quart by the same fifth that separates the two gallons.
How do I convert imperial quarts back to US quarts?
Divide by 0.83267418, or multiply by 1.2009499 — they are the same operation.

Other volume conversions

Imperial quarts to US quarts — the same conversion the other way.

Calculators that work in volume