Fluid Ounces to ML Converter
Convert fluid ounces to millilitres instantly. Free online fl oz to ml calculator with common values and formula.
Formula
ml = fl oz × 29.5735
Common Conversions
Volume Ounces to Millilitres
1 US fl oz = 29.57 ml. Multiply by 30 for quick mental math (within 1.5%) or 29.57 for precision. So 8 fl oz = 237 ml. UK fluid ounce is 28.41 ml (slightly smaller). Note: this is fluid ounce (volume), not weight ounce (28.35 g) - they share the name and rough number but measure different things.
Common context: converting American liquid recipes to metric. A 12 fl oz can of soda = 355 ml. A 32 fl oz US quart = 946 ml. A 64 fl oz half-gallon = 1.89 L. Cooking oils sold in US fl oz bottles convert directly when reading European recipes.
Common Fluid Ounces to Millilitres
| Fluid Ounces | Millilitres |
|---|---|
| 1 oz | 29.57 ml |
| 4 oz | 118.29 ml |
| 8 oz | 236.59 ml |
| 12 oz | 354.88 ml |
| 16 oz (1 pint) | 473.18 ml |
| 24 oz | 709.76 ml |
| 32 oz (1 quart) | 946.35 ml |
| 64 oz | 1892.71 ml |
Frequently Asked Questions
Is this fl oz or weight oz?
fl oz (fluid, volume). For weight ounces (oz, used for solids), see [Ounces to Grams](/oz-to-grams). They happen to be roughly equal for water (1 fl oz of water weighs about 1 oz) but differ for everything else.
Quick mental math?
Multiply by 30. 8 oz × 30 = 240 ml (true value 237 ml, within 1.5%). Good enough for kitchen use. Use 29.57 for precise pharmaceutical or scientific work.
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