Quarts to Liters Converter

Volumetric Metrology & Automotive Fluid Standards (NIST)

The quart (qt) is a quarter-gallon unit defined by standard metrology:

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• US Liquid Quart (NIST Handbook 44)**:

1 US liquid qt (1) / (4) US Gallon = 32 US fl oz = 0.946352946 L = 946.353 mL

Liters (L) = US Quarts × 0.946352946, US Quarts = Liters × 1.05668821

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• UK Imperial Quart**:

1 UK Imp qt (1) / (4) Imp Gallon = 40 Imp fl oz = 1.1365225 L = 1,136.523 mL

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• Standard Automotive & Fluid Benchmarks**:

• 1.0 US Liquid Quart = 0.9464 L = 946.35 mL = 32.00 fl oz

• 1.0 UK Imperial Quart = 1.1365 L = 1,136.52 mL = 40.00 fl oz

• 4.0 US Quarts (1 Gallon) = 3.7854 L = 3,785.41 mL

• 5.0 US Quarts (Oil Change) = 4.7318 L = 4,731.76 mL

• 5.0 Liters (Oil Jug) = 5.2834 US Quarts = 4.3994 UK Quarts

How to Use This Calculator

Enter your Volume Value to Convert (e.g. 5), Quart Measurement System — choose from US Liquid Quart (32 US fl oz = 0.9464 L = 946.35 mL - Automotive Oil & Beverages), UK Imperial Quart (40 Imp fl oz = 1.1365 L = 1,136.52 mL - British Standard), US Dry Quart (67.20 cu in = 1.1012 L = 1,101.22 mL - Produce & Agriculture), Conversion Direction — choose from Quarts (qt) to Liters (L = qt × liters_per_qt), Liters (L) to Quarts (qt = L ÷ liters_per_qt), and Automotive & Fluid Benchmark — choose from Custom Volume Value, 5.0 US Liquid Quarts (Car Engine Oil Capacity) → 4.7318 Liters (1.25 Gallons), 1.0 US Liquid Quart → 0.9464 Liters (32.0 fl oz / 946.35 mL). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Formula Reference: Quarts to Liters Converter

Input variables:

volumeQuantityInput — Volume Value to Convert

quartStandardSelect — Quart Measurement System

conversionDirectionSelect — Conversion Direction

Computed outputs:

convertedPrimaryResult — Converted Primary Output

millilitersEquivalent — Milliliters (mL)

fluidOuncesEquivalent — Fluid Ounces (fl oz)

pintsEquivalent — Liquid Pints (pt)

gallonsEquivalent — Liquid Gallons (gal)

Mathematical relationships extracted from calculation logic:

litersPerQuart = 0.946352946; // US Liquid Quart: 3.785411784 / 4

liters = quarts * litersPerQuart

mL = liters * 1000.0

flOz = quarts * flOzFactor

pints = quarts * 2.0

gallons = quarts / 4.0

Reference constants:

litersPerQuart = 0.946352946

flOzFactor = 32.0

Standard: NIST Handbook 44 and BIPM SI unit definitions

Worked Example

A car owner purchasing synthetic engine oil in Europe for a US vehicle requiring 5 quarts converts the capacity to 5 × 0.946353 = 4.7318 liters to ensure the crankcase is not overfilled.

Understanding Your Result

Unit conversion precision: round to the same number of significant figures as your original measurement. Converting 6 feet to meters gives 1.8288 m — but if your measurement was approximate (±1 inch), expressing more than 2 decimal places is false precision. For international trade and technical specifications, SI units (meters, kilograms, liters) are the standard. US customary units (feet, pounds, gallons) differ from Imperial UK units: 1 US gallon = 3.785 L vs. 1 UK gallon = 4.546 L.