Need to convert fluid ounces to millilitres? Here’s the quick answer, a full chart, and the common bottle sizes in both units.
Quick answer
- 1 US fluid ounce = 29.57 mL
- 1 UK (imperial) fluid ounce = 28.41 mL
The formula
mL = fluid ounces × 29.5735 (US)
fluid ounces = mL ÷ 29.5735
Oz to mL conversion chart (US)
| Fluid ounces (oz) | Millilitres (mL) |
|---|---|
| 0.5 oz | 14.8 mL |
| 1 oz | 29.6 mL |
| 2 oz | 59.1 mL |
| 3 oz | 88.7 mL |
| 4 oz | 118.3 mL |
| 6 oz | 177.4 mL |
| 8 oz | 236.6 mL |
| 10 oz | 295.7 mL |
| 12 oz | 354.9 mL |
| 16 oz (1 pint) | 473.2 mL |
| 24 oz | 709.8 mL |
| 32 oz (1 quart) | 946.4 mL |
Common bottle sizes in oz and mL
| Bottle | mL | US fl oz |
|---|---|---|
| Small sample | 30 mL | 1 oz |
| Cosmetic | 50 mL | 1.7 oz |
| Boston round | 120 mL | 4 oz |
| Juice / sauce | 250 mL | 8.5 oz |
| Standard spirit (EU) | 700 mL | 23.7 oz |
| Standard spirit / wine | 750 mL | 25.4 oz |
| Liter | 1,000 mL | 33.8 oz |
Whatever size you need, GlassRock makes it: from small cosmetic bottles to oil & vinegar bottles and glass mason jars.
US vs UK (imperial) ounces — why they differ
The US and UK define the fluid ounce slightly differently: a US fl oz is 29.57 mL, while a UK imperial fl oz is 28.41 mL. Always check which system a recipe or spec uses — for packaging, most of the world works in millilitres to avoid confusion.
Frequently asked questions
How many mL are in an ounce?
29.57 mL in a US fluid ounce (28.41 mL in a UK imperial ounce).
How many oz are in 750 mL?
About 25.4 US fluid ounces.
How many oz in 100 mL?
About 3.4 US fluid ounces.
Is a US ounce the same as a UK ounce?
No — they differ by about 1.2 mL.
Need a bottle in a specific mL or oz size? GlassRock manufactures custom glass bottles to your exact volume. See also our liquor bottle sizes guide e how glass is made.
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