US gallons to Liters converter

Type a value in either box and the other fills in instantly — no button, no waiting.

Type in either box — the other updates instantly.

Quick reference

US gallonsLiters
1 us gallons3.7854 liters
2 us gallons7.5708 liters
5 us gallons18.9271 liters
10 us gallons37.8541 liters
25 us gallons94.6353 liters
50 us gallons189.271 liters
100 us gallons378.541 liters

About this tool

1 US gallon = exactly 3.785411784 liters. Multiply gallons by 3.7854. Like every tool on this site, the conversion happens on your device — the numbers you type never leave your browser.

Common questions

How do I convert us gallons to liters by hand? 1 US gallon = exactly 3.785411784 liters. Multiply gallons by 3.7854.

Is this converter exact? It uses the standard defined conversion factors and rounds the display to at most 6 decimal places — more precision than any tape measure, scale, or recipe can use.

Private by design: this tool runs entirely in your browser. Nothing you type or open here is uploaded, stored, or tracked.