Ounces to mL Converter

Multiply US fluid ounces by 29.5735 to get milliliters: 8 fl oz = 236.6 mL (one US cup). A US gallon is 128 fl oz = 3,785 mL.

How to convert fluid ounces to milliliters

1. Type the value in fluid ounces into the converter (or into the right-hand box to go the other way).
2. Multiply by 29.5735295625 to get milliliters.
3. Round to a sensible precision with the Decimals control; the table below covers the values people look up most.

Fluid ounce to milliliter formula

milliliters = fluid ounces × 29.5735295625 — 1 fl oz = 29.57352956 mL. Both units are defined exactly (NIST SP 811); the factor above is rounded to 10 decimals, and the converter uses the full-precision ratio.

fl oz to mL conversion table

Container sizes

US vs UK ounces

A UK (imperial) fluid ounce is 28.41 mL, about 4% smaller than the US 29.57 mL — but a UK pint has 20 ounces versus 16 in the US, so a UK pint (568 mL) is bigger than a US pint (473 mL). Mixing ratios for 2-stroke fuel, concentrates and sprayers on imported products are often in mL per liter; switch the converter to mL ↔ L to check.

Related converters & calculators

• mL to Ounces ConverterDivide by 29.5735 (US fl oz).
• Cups to mL Converter1 US cup = 236.6 mL.
• Gallons to Liters ConverterMultiply by 3.78541 (US gallon).
• Liters to Gallons ConverterDivide by 3.78541.
• Cubic Feet to Gallons Converter1 ft³ = 7.48052 US gallons.
• Cubic Meters to Cubic Yards Converter1 m³ = 1.30795 yd³.
• Cubic Yards to Cubic Meters Converter1 yd³ = 0.764555 m³.
• Unit ConverterEvery unit in one fast converter.