How many mL in a shot?

A standard US shot is 1.5 fl oz, which equals 44.36 mL. Most metric shot glasses are sized at 40–50 mL.

Is the US fluid ounce the same as the UK one?

Very close but not identical. A US fl oz is 29.5735 mL; an imperial fl oz is 28.4131 mL.

Convert US fluid ounces into milliliters for cocktails, baby bottles, perfume sizes and travel rules abroad.

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From

1 fl oz = 29.57 ml

milliliters = fluid ounces × 29.5735

How many mL in a shot?: A standard US shot is 1.5 fl oz, which equals 44.36 mL. Most metric shot glasses are sized at 40–50 mL.
Is the US fluid ounce the same as the UK one?: Very close but not identical. A US fl oz is 29.5735 mL; an imperial fl oz is 28.4131 mL.