How the oz to mL converter works
This oz to mL calculator uses the standard US fluid ounce definition: 1 US fl oz = 29.5735 mL. When you type a value in ounces, it multiplies by 29.5735 to get milliliters. When you type a value in mL, it divides by 29.5735 to get US fluid ounces.
How to use the oz ↔ mL calculator
- Enter a value in either the Ounces (US fl oz) or Milliliters (mL) input.
- The other field will update instantly with the converted value.
- Use the Decimals control to round results for recipes, bar menus, or study notes.
- Click Share result to copy a short text summary to your clipboard.
Quick conversion chart of oz to mL
| Ounces (US fl oz) | Milliliters (mL) |
|---|---|
| 1 oz | ≈ 29.57 mL |
| 2 oz | ≈ 59.15 mL |
| 4 oz | ≈ 118.29 mL |
| 6 oz | ≈ 177.44 mL |
| 8 oz (1 cup) | ≈ 236.59 mL |
| 10 oz | ≈ 295.74 mL |
| 12 oz | ≈ 354.88 mL |
| 16 oz (1 pint) | ≈ 473.18 mL |
How much is one oz in mL?
One US fluid ounce is about 29.5735 mL. For quick mental math, many people use 30 mL ≈ 1 oz, but this is a small rounding up. The calculator above keeps the precise value and then rounds only for display.
Is eight oz two hundred fifty mL?
Not exactly. 8 oz ≈ 236.6 mL. A 250 mL glass is slightly larger than 8 oz — it is about 8.45 oz. For recipes and packaging, some brands treat 8 oz and 240–250 mL as "close enough", but they are not identical.
Is one hundred mL the same as three oz?
No. 3 oz ≈ 88.7 mL. So 100 mL is more than 3 oz, and is actually closer to 3.38 oz. If your recipe calls for 3 oz and you only have a mL measure, you would use about 90 mL, not 100 mL.
Is forty mL two oz?
No. 40 mL ≈ 1.35 oz. Two US fluid ounces is roughly 59.15 mL, which is quite a bit more. This is important when measuring medicines or spirits, where small differences matter.