Fluid ounces (US) to Millilitres Converter (fl oz to ml)
Convert fluid ounces (us) to millilitres instantly. 1 fl oz = 29.574 ml. Includes the formula, a full conversion table and a calculator that works offline.
The formula
To convert fluid ounces (us) to millilitres, multiply by 29.574:
ml = fl oz × 29.574Going the other way, divide instead — or multiply by 0.0338, which is the same thing:
fl oz = ml × 0.0338Fluid ounces (US) to Millilitres conversion table
| Fluid ounces (US) | Millilitres |
|---|---|
| 1 fl oz | 29.574 ml |
| 2 fl oz | 59.147 ml |
| 3 fl oz | 88.721 ml |
| 4 fl oz | 118.29 ml |
| 5 fl oz | 147.87 ml |
| 6 fl oz | 177.44 ml |
| 7 fl oz | 207.01 ml |
| 8 fl oz | 236.59 ml |
| 9 fl oz | 266.16 ml |
| 10 fl oz | 295.74 ml |
| 15 fl oz | 443.6 ml |
| 20 fl oz | 591.47 ml |
| 25 fl oz | 739.34 ml |
| 30 fl oz | 887.21 ml |
| 40 fl oz | 1,182.94 ml |
| 50 fl oz | 1,478.68 ml |
| 75 fl oz | 2,218.01 ml |
| 100 fl oz | 2,957.35 ml |
| 250 fl oz | 7,393.38 ml |
| 500 fl oz | 14,786.76 ml |
| 1000 fl oz | 29,573.53 ml |
Millilitres to Fluid ounces (US)
| Millilitres | Fluid ounces (US) |
|---|---|
| 1 ml | 0.0338 fl oz |
| 2 ml | 0.0676 fl oz |
| 3 ml | 0.1014 fl oz |
| 4 ml | 0.1353 fl oz |
| 5 ml | 0.1691 fl oz |
| 6 ml | 0.2029 fl oz |
| 7 ml | 0.2367 fl oz |
| 8 ml | 0.2705 fl oz |
| 9 ml | 0.3043 fl oz |
| 10 ml | 0.3381 fl oz |
What that actually looks like
A conversion factor is hard to judge on its own. These are quantities most people already have a feel for, converted for you:
- A can of drink is 12 fluid ounces — 354.88 ml
- A shot is 1.5 fluid ounces — 44.36 ml
Why both units are still in use
Volume has a hidden complication: the US and imperial systems use the same words for different amounts. A US gallon is 3.785 litres, while an imperial gallon is 4.546 litres — about 20 percent larger. The same is true of pints and fluid ounces. This page uses US measures, which is what recipes and fuel prices mean unless they say otherwise.
Mistakes worth avoiding
Check whether a recipe is American or British before converting. A US cup is 237 ml and an imperial cup is 284 ml, which is enough of a difference to ruin baking. If a recipe lists ounces for a solid ingredient it means weight, not fluid ounces.
The other habit worth breaking is rounding too early. Convert first, round once at the end, and you avoid the drift that turns a small approximation into a visible error by the third calculation.
Doing it in your head
When you only need a rough answer, multiply by 29 — which lands within 1.9 percent of the true value. Ten fluid ounces (US) works out at roughly 290 millilitres that way, against 295.74 exactly. An estimate is enough for deciding whether something will fit or whether a figure sounds plausible. When the number has to be right — because you are buying, cooking or building to it — use the calculator and let it carry the decimals.
Common questions
How many millilitres are in one US fluid ounce?
One US fluid ounce equals 29.574 millilitres. The calculator above handles any value, including decimals and very large numbers, and updates as you type.
Is this an exact conversion?
Yes — this is an exact defined ratio, not an approximation. The table rounds for readability; the calculator does not.
Does this work offline?
Yes. The conversion runs in your browser with no network request, so it works on a plane, in a basement, or on a phone with no signal once the page has loaded.