ucUnitCloudInternational unit matrix

Convert

US gallon to Litre

Volume is robust for liquids. For dry ingredients it does not replace weighing because density and packing vary.

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Convert units with formula, context and precision

UnitCloud is a local measurement lab for everyday work, engineering, IT, energy, mobility and design. Every conversion shows result, formula, base unit, rounding and the common mistake.

From1 gal
Result3.78541178 l
Factor1 gal = 3.785411784 l
Source basisBIPM SI Brochure · NIST Guide to SI Appendix B

Examples

011 gal = 3.78541178 l

Example value from the reference table. Internal calculation uses stored factors; display output is rounded.

02Common mistake

Volume is robust for liquids. For dry ingredients it does not replace weighing because density and packing vary.

03Base unit: l

1 US gal = 3.785411784 l. Then the value is converted through the base unit l into Litre.

Table

US gallonLitre
13.78541178
518.92705892
1037.85411784

Formula

1 US gal = 3.785411784 l. Then the value is converted through the base unit l into Litre.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.

Related conversions

Litre to US gallonl → galVolumeMillilitre to Cupml → cupVolumeCup to Millilitrecup → mlVolume

Search and practice paths

Search and practice paths

FormulaTableExamplesCommon mistakeEveryday/engineeringExcel/CSVBatch converterPrint view
mlKitchen, cups, millilitres and recipe values
Factor origin

Factors come from the stored source family and are not derived from rounded display values.

Rounding rule

UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.

When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, conversion with formula, sources current as of May 2026. Volume. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.

Common questions

What is the factor for US gallon to Litre?

1 gal = 3.785411784 l

Which formula does US gallon to Litre use?

1 US gal = 3.785411784 l. Then the value is converted through the base unit l into Litre.

When should I verify the result?

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.