In 1 ounce / gallon [oz / gal] [avoirdupois, US fluid] there is 31.5 ounce / barrel [avoirdupois, US fluid].

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grain / barrel [imperial] grain / barrel [US fluid] grain / bushel [imperial] grain / bushel [US dry] grain / centiliter grain / cubic centimeter grain / cubic foot [gr / ft³] grain / cubic inch [gr / in³] grain / cubic kilometer grain / cubic meter [gr / m³] grain / cubic mile [gr / mi³] grain / cubic millimeter grain / cubic yard [gr / yd³] grain / fluid ounce [gr / fl oz] [imperial, fliud] grain / fluid ounce [gr / fl oz] [US, fliud] grain / gallon [gr / gal] [imperial] grain / gallon [gr / gal] [US fluid] grain / liter [gr / l] grain / milliliter gram / barrel [imperial] gram / barrel [US fluid] gram / bushel [imperial] gram / bushel [US dry] gram / centiliter gram / cubic centimeter gram / cubic foot [g / ft³] gram / cubic inch [g / in³] gram / cubic kilometer gram / cubic meter [g / m³] gram / cubic mile [g / mi³] gram / cubic millimeter gram / cubic yard [g / yd³] gram / fluid ounce [g / fl oz] [imperial, fliud] gram / fluid ounce [g / fl oz] [US, fliud] gram / gallon [g / gal] [imperial] gram / gallon [g / gal] [US fluid] gram / liter [g / l] gram / milliliter kilogram / barrel kilogram / barrel kilogram / bushel kilogram / bushel kilogram / centiliter kilogram / cubic centimeter kilogram / cubic foot kilogram / cubic inch kilogram / cubic kilometer kilogram / cubic meter [kg / m³] kilogram / cubic mile kilogram / cubic millimeter kilogram / cubic yard kilogram / fluid ounce kilogram / fluid ounce kilogram / gallon kilogram / gallon kilogram / liter kilogram / milliliter ounce / barrel [avoirdupois, imperial] ounce / barrel [avoirdupois, US fluid] ounce / bushel [avoirdupois, imperial] ounce / bushel [avoirdupois, US dry] ounce / centiliter ounce / cubic foot [oz / ft³] [avoirdupois] ounce / cubic inch [oz / in³] [avoirdupois] ounce / cubic meter [oz / m³] [avoirdupois] ounce / cubic mile [oz / mi³] [avoirdupois] ounce / cubic yard [oz / yd³] [avoirdupois] ounce / fluid ounce [oz / fl oz] [avoirdupois, imperial] ounce / fluid ounce [oz / fl oz] [avoirdupois, US fliud] ounce / gallon [oz / gal] [avoirdupois, imperial] ounce / gallon [oz / gal] [avoirdupois, US fluid] ounce / liter [oz / l] [avoirdupois] ounce / milliliter pound / barrel [avoirdupois, imperial] pound / barrel [avoirdupois, US fluid] pound / barrel [metric, imperial] pound / barrel [metric, US fluid] pound / bushel [avoirdupois, imperial] pound / bushel [metric, imperial] pound / centiliter pound / centiliter pound / cubic centimeter pound / cubic centimeter pound / cubic foot [lb / ft³] [avoirdupois] pound / cubic foot [lb / ft³] [metric] pound / cubic inch [lb / in³] [avoirdupois] pound / cubic inch [lb / in³] [metric] pound / cubic kilometer pound / cubic kilometer pound / cubic meter [lb / m³] [avoirdupois] pound / cubic meter [lb / m³] [metric] pound / cubic mile [lb / mi³] [avoirdupois] pound / cubic mile [lb / mi³] [metric] pound / cubic millimeter pound / cubic millimeter pound / cubic yard [lb / yd³] [avoirdupois] pound / cubic yard [lb / yd³] [metric] pound / fluid ounce [lb / fl oz] [avoirdupois, imperial] pound / fluid ounce [lb / fl oz] [avoirdupois, US fliud] pound / fluid ounce [lb / fl oz] [metric, imperial] pound / fluid ounce [lb / fl oz] [metric, US fliud] pound / gallon [lb / gal] [avoirdupois, imperial] pound / gallon [lb / gal] [avoirdupois, US fluid] pound / gallon [lb / gal] [metric US fluid] pound / gallon [lb / gal] [metric, imperial] pound / liter [lb / l] [avoirdupois] pound / liter [lb / l] [metric] pound / milliliter pound / milliliter ton / barrel [imperial] ton / barrel [US fluid] ton / bushel [imperial] ton / bushel [US dry] ton / centiliter ton / cubic centimeter ton / cubic foot [t / ft³] ton / cubic inch [t / in³] ton / cubic kilometer ton / cubic meter [t / m³] ton / cubic mile [t / mi³] ton / cubic millimeter ton / cubic yard [t / yd³] ton / fluid ounce [t / fl oz] [imperial fliud] ton / fluid ounce [t / fl oz] [US fliud] ton / gallon [t / gal] [imperial] ton / gallon [t / gal] [US fluid] ton / liter [oz / l] ton / milliliter tonne / barrel [long, imperial] tonne / barrel [long, US fluid] tonne / bushel [long, US dry] tonne / centiliter tonne / cubic centimeter tonne / cubic foot [long] tonne / cubic inch [long] tonne / cubic kilometer tonne / cubic meter [long] tonne / cubic mile [long] tonne / cubic millimeter tonne / cubic yard [long] tonne / fluid ounce [long, imperial] tonne / fluid ounce [long, US] tonne / gallon [long, imperial] tonne / gallon [long, US fluid] tonne / liter [long] tonne / milliliter