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US customary to metric volume chart

Compare exact US customary values with milliliters and liters, then round only as much as your task permits.

By GallonMan Editorial Published Updated Editorial process Sources

US customary units do not map to tidy powers of ten. The metric values below retain the verified conversion constants; classroom estimates may use fewer decimal places.

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US customary to metric volume chart
One US customary unit expressed in metric volume
US customary amountMillilitersLiters
1 US teaspoon4.92892159375 mL0.004928921594 L
1 US tablespoon14.7867647813 mL0.014786764781 L
1 US fluid ounce29.5735295625 mL0.029573529563 L
1 US customary cup236.5882365 mL0.2365882365 L
1 US liquid pint473.176473 mL0.473176473 L
1 US liquid quart946.352946 mL0.946352946 L
1 US gallon3,785.411784 mL3.785411784 L

Remember: A US quart is close to—but not equal to—one liter. It is 0.946352946 L.

Values derive from GallonMan’s canonical dataset, verified 2026-09-01. US liquid, Imperial, and metric labels are intentionally explicit.

Precision and sensible rounding

The definitions are exact, but a screen or worksheet cannot show every repeating quotient. Keep the source factor during calculation. Round the final result based on the measuring tool: a marked kitchen jug rarely justifies six decimal places.

Example: 3 US cups to milliliters

Multiply 3 × 236.5882365 to get 709.7647095 mL. A recipe may reasonably round that to 710 mL.

Try a custom amount: use the liquid volume converter when your value is not in the table.