Milliliters to Fluid ounces Converter

The converter above is already set to milliliters and fluid ounces, so you only need to enter your number. The result updates as you type, and nothing is sent anywhere.

1. Type your value in the Value box, for example 250. Decimals and negative numbers are accepted.
2. Check that From shows milliliters and To shows fluid ounces. Both menus can be changed if you need a different pair.
3. Read the answer in the large result box. The note under it shows the exact factor used for one milliliter.
4. Press Copy result to put the answer on your clipboard, or Swap units to convert in the opposite direction.
5. Look at In every unit on the right to see the same amount in all the other volume units.

One milliliter is about 0.033814 fluid ounces, so the formula is fluid ounces = milliliters x 0.033814. Going the other way, one fluid ounce is about 29.5735 milliliters. A milliliter is one thousandth of a liter and equals one cubic centimeter. A US fluid ounce is about 29.57 milliliters, slightly more than the imperial fluid ounce of 28.41 milliliters.

Worked examples with the same factor:

• 250 milliliters: 250 x 0.033814 = 8.45351 fluid ounces
• 625 milliliters: 625 x 0.033814 = 21.1338 fluid ounces
• 2,500 milliliters: 2,500 x 0.033814 = 84.5351 fluid ounces

Divide by 30 for a rough value: 250 ml is about 8.3 fluid ounces, exactly 8.45.

To check the converter by hand, take 625 milliliters and apply the rule once: the result should be 21.1338 fluid ounces. If you go back again with the reverse factor 29.5735 you land on 625 milliliters, which confirms that the two directions agree. Rounding the factor to fewer digits for mental math gives a result that is close but not identical, so use the tool when the last digits matter.

These reference values come from the same factor the converter uses, so they match what you see above. Use the table for common amounts, and the converter for anything else.

Volume units are the most confusing family because the same names mean different amounts in different countries. The US customary system and the British imperial system both use gallons, pints and fluid ounces, but they are not equal, and neither matches the metric cup used in many recipes. This converter uses US customary measures for gallons, cups, tablespoons, teaspoons and fluid ounces, and exact metric definitions for liters and milliliters.

Use the table as a sanity check rather than a substitute for the converter. A liter is a little more than a quart and a quarter of a US gallon, and a milliliter is a thousandth of a liter, so a result that is wildly different from those landmarks probably used the wrong unit. When a recipe matters, weigh the ingredient if the recipe gives a weight.

Drink labels, baby bottles, medicine doses and travel liquid limits use milliliters, while US recipes and bottles use fluid ounces.

Measuring spoons and cups vary by country: a metric cup is 250 ml, a US legal cup is 240 ml and a US customary cup is 236.6 ml. For baking by weight, a scale is more consistent than any volume conversion because flour and sugar pack differently.

Related pages: Fluid ounces to Milliliters Converter for the reverse direction, and the cups to milliliters and teaspoons to milliliters pages. For other volume units use the volume converter.

The page keeps no history, so each visit starts again from the defaults, 250 milliliters. Your numbers are processed by JavaScript in your own browser and are never sent to a server, which makes the converter safe for private figures such as medical, financial or work measurements.