Volume conversion
Convert Milliliters to Fluid Ounces
1 milliliter equals 0.0338 US fluid ounces. To convert milliliters to fluid ounces, divide the milliliters by 29.5735.
Milliliters to fluid ounces helps with recipes, baby bottles, skincare and medicine doses, and the TSA carry-on liquid limit. This page uses US fluid ounces (volume), not weight ounces. Enter any milliliter value for an instant fluid-ounce result with the factor shown.
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Computed at full precision in your browser; the result is rounded for display.
How to convert milliliters to fluid ounces
Formula
fluid ounces = milliliters ÷ 29.5735 milliliters = fluid ounces × 29.5735One US fluid ounce is 29.5735 mL. Note the US fluid ounce differs from the imperial (UK) fluid ounce of about 28.41 mL, so check which system a label uses.
| Milliliters | Fluid ounces (US) |
|---|---|
| 5 mL | 0.1691 fl oz 1 tsp |
| 15 mL | 0.5072 fl oz 1 tbsp |
| 30 mL | 1.014 fl oz ≈ 1 fl oz |
| 50 mL | 1.691 fl oz |
| 100 mL | 3.381 fl oz travel-size |
| 118 mL | 3.99 fl oz ½ cup |
| 237 mL | 8.014 fl oz 1 cup |
| 250 mL | 8.454 fl oz metric cup |
| 500 mL | 16.91 fl oz |
| 1000 mL | 33.81 fl oz 1 liter |
Worked example
A skincare bottle is 100 mL and the carry-on rule is quoted in ounces (3.4 fl oz / 100 mL is the TSA limit). Divide 100 by 29.5735 to get 3.38 fl oz — right at the limit. A 500 mL water bottle is about 16.9 fl oz, and a one-liter bottle is 33.8 fl oz.
Shortcut. Quick estimate: divide milliliters by 30. 100 mL ÷ 30 ≈ 3.3 fl oz, almost exactly the true 3.38 fl oz.
Good to know
Keep fluid ounces (volume) separate from weight ounces (mass) — they share a name but measure different things. This page uses US fluid ounces; the imperial fluid ounce is slightly smaller (about 28.41 mL), so UK recipes and bottles won't match exactly. The TSA 3-1-1 liquids rule is the most-searched use of this conversion: 3.4 fl oz equals 100 mL.
Frequently asked questions
How many oz is 100 mL?
100 milliliters is about 3.38 US fluid ounces — the TSA carry-on liquid limit is set right at 3.4 fl oz / 100 mL.
How many mL in a fluid ounce?
One US fluid ounce is 29.5735 milliliters. The imperial (UK) fluid ounce is slightly smaller at about 28.41 mL.
What is 500 mL in ounces?
500 mL is about 16.9 US fluid ounces, a common water-bottle size. One liter (1000 mL) is 33.8 fl oz.
Are these fluid ounces or weight ounces?
Fluid ounces — a measure of volume. Weight ounces measure mass and convert to grams, not milliliters.
What is the TSA liquid limit in mL?
100 milliliters, which equals 3.4 US fluid ounces. Containers must be 100 mL or smaller to pass carry-on screening.