ConvBolt — Unit ConverterMilliliters to US gallons Converter
Converting milliliters to US gallons is a multiplication by a fixed factor: 1 ml = 0.0002641721 gal. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one milliliter works out to 0.0002641721 gal, the us gallon is the far smaller unit of the two: a figure given in us gallon always carries a smaller number than the same measurement in milliliter. A chart drawn in ml can hide that, so check which label the axis uses before you compare two readings.
When a container size is certified in US gallons but you are dosing in milliliters, it pays to convert from the certified figure rather than from a rounded label.
The conversion factor used here is 0.0002641721 gal per milliliter (10 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 ml a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 3785.412 ml per gal, the exact reciprocal, so a round trip through both pages returns your original number.
Milliliters to US gallons formula
Use this formula to convert any milliliter value to US gallons:
Worked example: 100 ml × 0.0002641721 = 0.02641721 gal.
Milliliters to US gallons conversion table
| Milliliters (ml) | US gallons (gal) |
|---|---|
| 0.5 ml | 0.000132086 gal |
| 1 ml | 0.0002641721 gal |
| 2 ml | 0.0005283441 gal |
| 5 ml | 0.00132086 gal |
| 10 ml | 0.002641721 gal |
| 20 ml | 0.005283441 gal |
| 50 ml | 0.0132086 gal |
| 100 ml | 0.02641721 gal |
| 500 ml | 0.132086 gal |
| 1000 ml | 0.2641721 gal |
How to convert milliliters to US gallons
Multiply the milliliter value by 0.0002641721 to get the equivalent in US gallons. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the US gallons to Milliliters converter instead of dividing by hand; both pages use the same source factors. For every other ml conversion in one place, see the ml conversion hub.
Frequently asked questions
How many US gallons are in 1 milliliter?
1 milliliter = 0.0002641721 gal.
What is 100 milliliters in US gallons?
100 ml = 0.02641721 gal.
Is converting milliliters to US gallons the same as US gallons to milliliters?
No — the direction changes the multiplier. The reverse conversion (1 gal = 3785.412 ml) is on the US gallons to Milliliters page.
Related conversions
Try the ConvBolt Unit Converter for any other volume unit, browse the Volume conversions, or read our conversion guides.