Ounces to Milliliters Converter

Convert fluid ounces to milliliters and milliliters to fluid ounces for US or Imperial (UK) fl oz, with instant two-way results.

Choose US customary or British Imperial fluid ounces — the conversion factors differ slightly (about 4%).

Enter either fl oz or mL and the other value updates immediately.

Uses exact definitions: US 1 fl oz = 29.5735295625 mL; Imperial 1 fl oz = 28.4130625 mL.

Fluid ounce system

US: 1 fl oz = 29.5735295625 mL · Imperial: 1 fl oz = 28.4130625 mL. Fluid ounces are a volume unit — do not confuse with ounces of weight (mass).

Volume in ounces

fl oz

Volume in milliliters