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Volume Converter
Convert between gallons, liters, barrels, cubic meters, cubic feet, cubic inches, fluid ounces, and milliliters.
Enter a value in any field
Conversion references
1 US barrel (bbl) = 42 US gallons = 158.987 liters
1 US gallon = 3.78541 liters = 128 fl oz
1 cubic meter = 6.28981 bbl = 35.3147 ft³
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Book a free strategy call →About Volume Unit Conversion
Volume conversions are essential in petroleum engineering. Oil production is measured in barrels (bbl), where 1 barrel = 42 US gallons. Gas volumes use cubic feet (scf, Mscf, MMscf). Tank capacities may be in gallons or cubic meters. This tool handles all common volume units used in oil and gas and general engineering.
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