Convert fl oz to ml
Convert fl oz to ml instantly. 1 fl oz = 29.57353 ml. Formula, worked examples and a quick reference table.
Last updated
One us fluid ounce equals 29.57353 milliliters. To convert any number of us fluid ounces to milliliters, multiply by 29.57352956.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Volume is the category where the US and imperial systems diverge most damagingly. Gallons, quarts, pints and fluid ounces all exist in two sizes that differ by up to 20%, and nothing in the name warns you which one a figure uses. Recipes, fuel economy figures and container capacities all cross borders regularly, so it is worth checking which system a source is using before converting rather than after.
fl oz to ml formula
To go the other way, use us fluid ounce = milliliter ÷ 29.57352956.
About these units
The US fluid ounce is 29.57 millilitres; the imperial fluid ounce is 28.41 ml. They are close enough to look interchangeable and far enough apart to spoil a recipe scaled up.
A millilitre is exactly one cubic centimetre. Because one millilitre of water weighs one gram, the unit doubles as a rough mass measure in the kitchen.
US Fluid Ounce is also written fluid ounce, fluid ounces, floz and oz. Milliliter is also written millilitre, millilitres, milliliters and cc.
Sources
- National Bureau of Standards, "Refinement of Values for the Yard and the Pound", Federal Register, 1 July 1959 — the international yard as exactly 0.9144 m and the avoirdupois pound as exactly 0.45359237 kg.
- NIST Special Publication 811, Guide for the Use of the International System of Units (SI), 2008 edition — conversion factors for units outside the SI.
fl oz to ml conversion table
| US Fluid Ounce | Milliliter |
|---|---|
| 1 fl oz | 29.5735 ml |
| 2 fl oz | 59.1471 ml |
| 3 fl oz | 88.7206 ml |
| 5 fl oz | 147.8676 ml |
| 10 fl oz | 295.7353 ml |
| 20 fl oz | 591.4706 ml |
| 25 fl oz | 739.3382 ml |
| 50 fl oz | 1,478.6765 ml |
| 100 fl oz | 2,957.353 ml |
| 250 fl oz | 7,393.3824 ml |
| 500 fl oz | 14,786.7648 ml |
| 1,000 fl oz | 29,573.5296 ml |
Frequently asked questions
How many milliliters are in a us fluid ounce? +
There are 29.57353 milliliters in one us fluid ounce.
What is 10 fl oz in ml? +
10 fl oz equals 295.7353 ml. Multiply 10 by 29.57352956.
How do I convert milliliter back to us fluid ounce? +
Use us fluid ounce = milliliter ÷ 29.57352956. The converter above handles both directions, or see our dedicated ml to fl oz page.
How accurate is this us fluid ounce to milliliter conversion? +
The factor used is 29.5735295625, carried at full double precision. Where a unit has an exact legal definition the factor is exact rather than approximate. Rounding is applied only to the displayed result, so the answer is never a calculation done on an already-rounded number.
Is there a quick way to estimate fl oz to ml in my head? +
Multiply by 59 and divide by 2. That approximates the true factor of 29.57353 to within 0.2486%, which is close enough for a mental estimate.