oil barrel to US gallon Converter
Convert bbl to US gal and back with a live reference table.
1 bbl = 42 US gal\n5 bbl = 210 US gal\n10 bbl = 420 US gal\n25 bbl = 1050 US gal\n50 bbl = 2100 US gal\n100 bbl = 4200 US gal
Why this conversion matters
Petroleum barrels are fixed at 42 US gallons, a different convention from many physical storage barrels. The widget keeps the direction explicit so you can enter either side of the pair without doing the reciprocal by hand. It is built for quick checks where a calculator, specification sheet, recipe, map, or lab note uses the other unit.
For the default example, 3 bbl converts to 126 US gal. Switching the direction shows the inverse relationship, so 126 US gal converts back to 3 bbl with the same factor.
Formula and privacy note
The calculation uses 1 bbl = 42 US gal. Forward conversion multiplies by that factor, and reverse conversion divides by it. Results are rounded to six significant figures for readable estimates, so very small scientific units and large planning units stay scannable. Check the unit labels before copying a result, especially when similar abbreviations appear in the same project. The reference table is generated from the same constant, and everything runs locally in your browser.
Frequently Asked Questions
What factor does this converter use?
It uses the standard factor 1 bbl = 42 US gal, then applies the reciprocal for the reverse direction.
Why are results rounded?
The main result is rounded to six significant figures so very large and very small values stay readable while preserving the useful precision for quick checks.
Can I convert both directions?
Yes. Choose bbl to US gal or US gal to bbl from the direction menu and the output updates immediately.
Is this converter private?
Yes. The conversion runs entirely in your browser, and the value you enter is not uploaded or stored.
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