Fluid ounces to milliliters converter
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Convert fluid ounces to milliliters instantly: 1 fl oz is 29.57 ml. Cans, jiggers and medicine cups, with exact math and one-click copying.
Twelve fluid ounces is 355 ml — the most printed number in vending machines.
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Math, not advice — results are indicative. Read the disclaimer.
pro tips
Mental shortcut: multiply by 30, then subtract a small splash — 8 fl oz lands near 240; the real answer is 236.6.
The 12 oz can is 355 ml — memorize that one pair and half your fridge converts itself.
A recipe "cup" is 8 fl oz ≈ 237 ml — smaller than every mug you actually drink from.
what it does
One US fluid ounce is exactly 29.5735295625 milliliters — a definition, not an estimate, which is more than most of what gets measured in fluid ounces can claim. Multiply by 29.57 and the milliliters line up like well-behaved shots.
Where it shows up: drink cans and bottles that speak two languages on one label, cocktail jiggers, recipe "cups" measured in ounces while your measuring jug thinks metric, baby formula instructions, and every coffee shop where a small is 8 ounces and nobody says how much that is.
The rough version: multiply by 30, then subtract one small splash. Eight fluid ounces lands near "about 240" when the honest answer is 236.6 — close enough for coffee, generous for cocktails, wrong for chemistry.
Type any number and the widget answers in milliliters instantly, with the math written in the hint. Click the result to copy it, and use swap when someone quotes you milliliters back — the milliliters-to-fluid-ounces version handles the reply.
quick answers
How many ml is 8 fl oz?
236.59 ml — call it 237. That's the "cup" American recipes mean, which explains why their cookies turn out different from yours.
Is 250 ml equal to 8 oz?
No — 250 ml is 8.45 fl oz. The metric cup is about 4% more generous, which adds up over a batch of batter.
How many ml is a pint?
A US pint is 16 fl oz = 473 ml. The imperial pint is 20 fl oz ≈ 568 ml, which is why ordering a pint in London goes further than in Boston.
Why does my mug say 12 oz but hold more?
Mugs are filled to the brim for marketing and to 8-10 oz in practice. The printed number describes the recipe cup, not the emotional support vessel you actually own.