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About this tool
Convert US gallons to liters instantly. Free, bidirectional, and fully in-browser.
1 us gallon equals 3.785411784 liters — enter any us gallon value to convert it to liters instantly. This US gallon to Liter converter is a client-side tool: it applies a single multiplication (L = gal × 3.785411784) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert liters back to US gallons. A reference table lists common us gallon values already converted, and nothing you enter is sent to a server.
Open US gallon to Liter Converter on AltFTool — it loads instantly in your browser.
Type the value you want to convert into the US gallon field.
Read the equivalent in liters in the result field, and copy it if needed.
Use the decimal-places slider for more or less precision, or press swap to convert liters to US gallons.
The result updates as you type, and the swap button flips the conversion to liter → us gallon without reloading.
The conversion uses the precise factor (L = gal × 3.785411784), 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 us gallon is 3.785411784 liters. Multiply the us gallon value by 3.785411784 to convert. For example, 10 gal = 37.85411784 L.
L = gal × 3.785411784. This tool applies it automatically and shows a worked example: 10 gal = 37.85411784 L.
Yes. Press the swap button, or type into the liter field, and the tool converts liters to US gallons using the inverse of the same relationship.
It uses the standard volume and capacity definition (L = gal × 3.785411784), 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 US gallon to Liter Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
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