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Convert Liters to Quarts - Volume Converter

This converter transforms a volume value expressed in liters into US liquid quarts. It is intended for everyday use, lab quick-checks, cooking, and unit-aware engineering tasks where a straightforward mathematical conversion is required.

The relationship used is based on internationally recognized unit definitions. The liter is defined exactly as one cubic decimeter. The US liquid quart is commonly expressed relative to the liter; the tool uses the conventional conversion factors described in the methodology and citations.

This tool is a mathematical converter for unit-to-unit transformation. It is not a substitute for traceable measurement, calibration certificates, or legally required metrological verification when working under regulatory control or for trade.

Updated Nov 30, 2025

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Methodology

Conversion is implemented using fixed, conventional unit definitions: one liter is exactly one cubic decimeter. The US liquid quart is converted via its accepted liter equivalence.

Primary numeric relationships used: 1 US liquid quart = 0.946352946 liters. Equivalently, 1 liter = 1.056688209... US liquid quarts. These values are widely used in standards and reference data.

Numerical computation follows standard IEEE 754 double-precision arithmetic for internal calculation. Results are rounded for display; rounding and floating-point representation can introduce tiny differences compared with high-precision or metrological software.

Worked examples

1 liter → 1.05668821 US quart

2.5 liters → 2.64172052 US quarts

0.946352946 liters → 1.00000000 US quart (exact by definition of the factor)

Further resources

Expert Q&A

Is the quart here the US liquid quart or the Imperial quart?

This converter uses the US liquid quart. The Imperial (UK) quart is different: 1 Imperial quart ≈ 1.1365225 liters. Use the appropriate unit for your region or switch to an Imperial-specific conversion if needed.

Are these values exact?

The liter is defined exactly as one cubic decimeter. The conversion factor to the US liquid quart shown is the conventional relationship used in standards and reference tables. Calculated numeric results are subject to floating-point rounding; for legal metrology or calibrated measurements, use traceable standards and authorized procedures.

How many decimal places should I trust for lab or engineering work?

For routine practical use, 3–6 decimal places are usually sufficient. For laboratory or calibration work that requires metrological traceability, follow the significant-figure and uncertainty requirements in applicable standards (refer to NIST and ISO documents) and use calibrated instruments.

How do I convert quarts back to liters?

Invert the factor: liters = quarts × 0.946352946. Alternatively, liters = quarts / 1.056688209.

Can I rely on this converter for legal trade, labeling, or compliance?

No. This tool provides quick mathematical conversions. For legal trade, regulatory labeling, or compliance, consult the relevant national metrology authority and the applicable standards; measurements used for those purposes must be traceable and compliant with local laws.

Sources & citations