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Volume

qt (US)togal (UK)

Convert US liquid quarts (qt (US)) to imperial gallons (gal (UK)).

Factor1 qt (US) = 0.2081685 gal (UK)

Converter

qt (US)

Accepts numbers or expressions, e.g. 150 + 14.7

Result
2.08169gal (UK)

Rendered to 6 significant figures.

Formula

Formula
gal (UK) = qt (US) × 0.2081685

Multiply any value in US liquid quarts by 0.2081685 to obtain the value in imperial gallons.

Worked example

Convert 10 qt (US) to gal (UK).

  1. 01Start with 10 qt (US).
  2. 02Multiply by the conversion factor: 10 × 0.2081685 = 2.08169 gal (UK).
Result10 qt (US) = 2.08169 gal (UK)

Conversion table

qt (US)gal (UK)
10.20817
20.41634
51.0408
102.0817
204.1634
5010.408
10020.817
20041.634
500104.08
1000208.17

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from qt (US) to gal (UK)?
1 qt (US) equals 0.2081685 gal (UK). To convert, multiply the value in US liquid quarts by 0.2081685.
How do I convert 1 qt (US) to gal (UK)?
1 qt (US) = 0.208169 gal (UK). For any value, multiply by 0.2081685.
How do I convert gal (UK) back to qt (US)?
Divide by the same factor — or equivalently, multiply by 4.8038. So 1 gal (UK) = 4.8038 qt (US).
When would I need to convert US liquid quart to imperial gallon?
Volume conversions are used for tank sizing, batch calculations, and bridging between vendor specs (gallons, barrels, ft³) and process documentation (m³, litres).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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