Milliliters to Fluid Ounces (mL to fl oz) Converter

Milliliters to Fluid Ounces Formula

To convert milliliters to fluid ounces, divide by 29.5735.

Formula: fl oz = mL ÷ 29.5735

For example, 355 mL ÷ 29.5735 = 12 fl oz (a standard US can).

One US fluid ounce is defined as exactly 29.5735295625 milliliters. This comes from the gallon chain: 1 US gallon = 231 cubic inches = 3785.411784 mL, and 1 gallon = 128 fl oz, so 1 fl oz = 3785.411784 ÷ 128 = 29.5735... mL. All values in the US fluid volume system ultimately trace back to the gallon definition, which is why the fl oz has such a specific, non-round metric equivalent.

Common Drink and Product Sizes

Some of the most familiar metric container sizes have exact US fluid ounce equivalents that are worth memorizing. The 355 mL standard US can is exactly 12 fl oz — that's by design, since US cans were sized in fluid ounces before metric labeling requirements added the mL value. The 750 mL wine bottle is 25.36 fl oz. The 500 mL European bottle is 16.91 fl oz — just under a US pint (16 fl oz). These benchmarks make quick mental conversions much easier in practice.

• 355 mL (standard US can) = 12 fl oz
• 473 mL (large US can / pint) = 16 fl oz
• 500 mL (European bottle) = 16.91 fl oz
• 750 mL (wine bottle) = 25.36 fl oz
• 1000 mL (1 liter) = 33.81 fl oz

Milliliters to Fluid Ounces Conversion Table

When to Convert Milliliters to Fluid Ounces

Cooking from European and Asian recipes: International recipes use milliliters for all liquid quantities. When a recipe calls for 200 mL of coconut milk, that's 6.76 fl oz — about ¾ cup plus a bit extra. Using the US measuring cup (8 fl oz = 236.6 mL), you'd need to use slightly less than a full cup. Converting the exact mL amount to fluid ounces lets you measure with cup and tablespoon measures rather than needing a graduated metric measuring jug, which many US kitchens don't have.

Medicine and over-the-counter dosing: Liquid medications are labeled in milliliters globally because mL is the scientific standard for volume. However, many patients — especially in the US — think in terms of tablespoons or fluid ounces. One tablespoon = 14.79 mL; one fluid ounce = 29.57 mL. A 5 mL dose is about 0.17 fl oz — well under a teaspoon. For children's liquid medications, where dosing precision is critical, relying on the mL measurement directly (using the dropper or syringe that comes with the medication) is safer than converting to fluid ounces and back, but understanding the fl oz equivalent helps parents compare dosing instructions from different sources.

Bartending and cocktail measurement: International cocktail recipes and guides often specify volumes in mL. A 45 mL pour is 1.52 fl oz — a standard US 1.5 fl oz shot. A 60 mL double pour is 2.03 fl oz. European bar jiggers typically have 30 mL and 60 mL sides; US jiggers have 1 fl oz and 1.5 fl oz sides. Knowing the mL-to-fl-oz equivalents lets bartenders seamlessly use either jigger style for international recipe books.

Cosmetics and skincare product comparison: Skincare and hair care products sold in metric markets use mL labeling. A 100 mL serum (3.38 fl oz) is slightly larger than the travel-size 3.4 fl oz US format. A 200 mL moisturizer is 6.76 fl oz. Converting mL to fl oz helps US consumers compare imported and domestic product sizes and calculate cost per fluid ounce across different package sizes.

FAQ

How many fl oz is 100 mL?

100 mL ≈ 3.381 US fluid ounces. This is slightly less than a standard shot glass and a half. The 100 mL size is also the maximum allowed for individual liquid containers in TSA carry-on luggage — equivalent to 3.38 fl oz, which is why US airport signs say "3.4 oz or less."

How many fl oz is 250 mL?

250 mL ≈ 8.45 US fluid ounces. This is slightly more than 1 US cup (8 fl oz = 236.6 mL) — the 250 mL Australian metric cup is about 13.4 mL larger than the US customary cup, which is why the same recipe can yield different results depending on which country's measuring cup is used.

How many fl oz is 500 mL?

500 mL ≈ 16.91 US fluid ounces — just under 17 fl oz. This is just under a US pint (16 fl oz = 473.18 mL). So a European 500 mL bottle holds about 27 mL more than a US pint bottle of the same product.

How many fl oz is 30 mL?

30 mL ≈ 1.014 fl oz — essentially 1 fluid ounce. This is why medicine is often measured in 30 mL (commonly rounded to "1 fl oz = 30 mL" for dosing convenience), and why a standard cocktail shot is often described as both 1 fl oz and 30 mL despite the 0.43 mL discrepancy.

How many mL is 1 fluid ounce?

1 US fl oz = exactly 29.5735295625 mL. Commonly rounded to 29.57 mL for calculations or 30 mL for medical contexts where simplicity matters more than the 1.4% rounding error.