Loading page
About this tool
Convert oil barrels to US gallons instantly. Free, bidirectional, and fully in-browser.
1 oil barrel equals 42 US gallons — enter any oil barrel value to convert it to US gallons instantly. This Oil barrel to US gallon converter is a client-side tool: it applies a single multiplication (gal = bbl × 42) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert US gallons back to oil barrels. A reference table lists common oil barrel values already converted, and nothing you enter is sent to a server.
Open Oil barrel to US gallon Converter on AltFTool — it loads instantly in your browser.
Type the value you want to convert into the Oil barrel field.
Read the equivalent in US gallons in the result field, and copy it if needed.
Use the decimal-places slider for more or less precision, or press swap to convert US gallons to oil barrels.
The result updates as you type, and the swap button flips the conversion to us gallon → oil barrel without reloading.
The conversion uses the precise factor (gal = bbl × 42), so the number matches a manual calculation to the decimal places you choose.
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Everything runs locally in your browser — no upload, no account, no limit on conversions.
One oil barrel is 42 US gallons. Multiply the oil barrel value by 42 to convert. For example, 10 bbl = 420 gal.
gal = bbl × 42. This tool applies it automatically and shows a worked example: 10 bbl = 420 gal.
Yes. Press the swap button, or type into the us gallon field, and the tool converts US gallons to oil barrels using the inverse of the same relationship.
It uses the standard volume and capacity definition (gal = bbl × 42), not a rounded approximation, so results are exact to the number of decimal places you select.
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Add the Oil barrel to US gallon Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
<iframe src="https://www.altftool.com/embed/widget/oil-barrels-to-us-gallons-converter"
title="Oil barrel to US gallon Converter — free AltFTool widget"
width="100%" height="640" style="border:0;border-radius:12px;overflow:hidden"
loading="lazy" referrerpolicy="no-referrer-when-downgrade" allow="clipboard-write"></iframe>
<p style="font-size:12px;margin:4px 0 0">Widget by <a href="https://www.altftool.com/tools/all/oil-barrels-to-us-gallons-converter?utm_source=embed&utm_medium=widget" rel="nofollow">AltFTool — free online tools</a></p>