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Oz ↔ mL Converter

Oz to mL & mL to Oz Calculator

Type in ounces or milliliters and see the other update instantly. Uses 1 US fluid ounce = 29.5735 mL.

Decimals:
2

Enter any US fluid ounce value (commonly used in recipes and beverage sizes).

Enter a mL value to convert back to US fluid ounces.

Formula: mL = oz × 29.5735  •  oz = mL ÷ 29.5735
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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

  1. Enter a value in either the Ounces (US fl oz) or Milliliters (mL) input.
  2. The other field will update instantly with the converted value.
  3. Use the Decimals control to round results for recipes, bar menus, or study notes.
  4. 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.

Frequently Asked Questions

How do you convert oz to mL and mL to oz?
To convert oz → mL, multiply by 29.5735. To convert mL → oz, divide by 29.5735. This calculator uses the US fluid ounce, which is standard in US recipes and drink sizes.
Does this calculator use US or UK ounces?
It uses the US fluid ounce (1 US fl oz ≈ 29.5735 mL). The UK (Imperial) fluid ounce is slightly larger at about 28.41 mL, so values will differ a little. For most modern recipes and packaging, the US fluid ounce is the default.
Can I use this oz to mL converter for cooking and cocktails?
Yes. This tool is ideal for kitchen recipes, baking, and cocktails when you need to switch between ounces and milliliters. Adjust the decimals to show more precise values for professional bar work or less precision for everyday cooking.
Why do my package labels sometimes show slightly different mL for the same oz?
Many labels use rounded values (for example, 8 oz shown as 240 or 250 mL) to make numbers easier to read. Our calculator uses the exact conversion factor and then rounds only to the decimal places you choose.