US Gallons to Milliliters (gal to mL)
1 US gallon equals 3,785.411784 milliliters exactly.
How to convert US gallons to milliliters
To convert US gallons to milliliters, multiply the number of US gallons by 3,785.411784. This factor is exact. To go the other way, multiply milliliters by 0.0002641720524 (rounded).
milliliters = US gallons × 3,785.411784
Example: 10 US gallons = 37,854.11784 milliliters.
Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.
About these units
US Gallon (gal)
Exactly 231 cubic inches or 3.785411784 liters (128 US fluid ounces). About 17% smaller than the imperial gallon.
The US gallon is a survivor of English wine trade. Around 1706, a statute in Queen Anne's reign fixed the wine gallon at exactly 231 cubic inches, settling confusion among the competing gallons for wine, ale and corn. British colonies in North America used that wine gallon, and in 1824 Britain replaced all its gallons with a new imperial one while the United States kept the old measure. It was adopted as the legal US standard in 1836 and is still defined as exactly 231 cubic inches, or 3.785411784 liters.
That makes the US gallon about 17 percent smaller than the imperial gallon, a difference that explains why American and British fuel-economy figures cannot be compared directly. Everyday uses are milk jugs, paint cans and gasoline pumps. One gallon divides evenly into four quarts, eight pints, sixteen cups and 128 fluid ounces. A gallon of water weighs a little over 8 pounds, an easy figure to remember when loading a car with water jugs.
1 US gallon = 3.785411784 liters (exactly).
Sources: Wikipedia: Gallon; NIST SP 811, Appendix B.8: conversion factors for volume
Milliliter (mL)
One thousandth of a liter, or exactly 1 cubic centimeter. Used for medicine, cooking and small containers.
Milliliters inherit everything from the liter, since the prefix simply means one thousandth. Because the liter is a cubic decimeter, a milliliter works out to exactly one cubic centimeter, a coincidence the metric system built in on purpose so that volume, length and mass interlock. One milliliter of water has a mass of about one gram, so a dosing syringe, a kitchen scale and a measuring jug can all be checked against one another.
Today milliliters dominate wherever small amounts must be measured precisely: medicine, flavorings, perfume, shampoo and the fine print on drink labels. Spelling is a mild regional split, with uppercase mL preferred in the United States, Canada and Australia and lowercase ml common in the UK and Europe. For scale, a US teaspoon is just under 5 mL, a US tablespoon is about 14.8 mL, and the US nutrition-label cup is exactly 240 mL, so one such cup is 240 of these tiny units.
1 milliliter = 0.001 liters (exactly).
Sources: Wikipedia: Litre; NIST SP 811, Appendix B.8: conversion factors for volume; 21 CFR 101.9: nutrition labeling household measures
Related conversions
- Milliliters to US gallons (reverse)
- US gallons to liters
- US gallons to US cups
- US gallons to US fluid ounces
- US gallons to cubic meters
- US gallons to cubic centimeters
- US gallons to US quarts
- US gallons to US pints
- US gallons to US tablespoons
- US gallons to US teaspoons
- US gallons to metric cups
- US gallons to metric tablespoons
- US gallons to metric teaspoons
- Liters to milliliters
- US cups to milliliters
- US fluid ounces to milliliters
- Cubic meters to milliliters
- Cubic centimeters to milliliters
- US quarts to milliliters
- US pints to milliliters
- US tablespoons to milliliters
- US teaspoons to milliliters
- Metric cups to milliliters
- Metric tablespoons to milliliters
- Metric teaspoons to milliliters
See all volume units.