When you need this conversion
Drinks, cosmetics and medicine bottles, cooking, and travel limits. Labels in the US give fluid ounces; most of the world uses milliliters.
Quick reference (US fl oz)
- 5 mL = 0.169 fl oz (a teaspoon)
- 15 mL = 0.507 fl oz (a tablespoon)
- 100 mL = 3.3814 fl oz
- 250 mL = 8.45351 fl oz
- 355 mL = 12.004 fl oz (a US can)
- 750 mL = 25.3605 fl oz (a wine bottle)
US vs UK fluid ounces
A US fluid ounce is 1/128 US gallon; a UK fluid ounce is 1/160 UK gallon. The UK ounce is about 4% smaller, so 100 mL is 3.38 US fl oz or 3.52 UK fl oz. Switch the unit menu to “fl oz (UK)” for imperial values.
Common mistakes
Mixing fluid ounces with weight ounces. 8 fl oz of flour doesn’t weigh 8 oz.
Assuming 30 mL per ounce. Many medicine cups use 30 mL as 1 oz; for recipes and labeling, 29.57 mL is exact.
For the reverse, use fluid ounces to mL.