# mL to oz Converter Calculator

Convert milliliters to fluid ounces and back. Supports both US and imperial fluid ounces with exact conversion factors for cooking, medicine, and science.

## What this calculates

Convert between milliliters and fluid ounces in seconds. This calculator handles both US fluid ounces (29.57 mL) and imperial fluid ounces (28.41 mL), so you always get the right measurement for your recipe, medication, or lab work.

## Inputs

- **Value** — min 0 — Enter the amount to convert.
- **Convert** — options: Milliliters → US Fluid Ounces, US Fluid Ounces → Milliliters, Milliliters → Imperial Fluid Ounces, Imperial Fluid Ounces → Milliliters

## Outputs

- **Result** — The converted value.
- **Conversion** — formatted as text — The full conversion expression.
- **US Fluid Ounces** (US fl oz) — Equivalent in US fluid ounces.
- **Imperial Fluid Ounces** (imp fl oz) — Equivalent in imperial fluid ounces.
- **Milliliters** (mL) — Equivalent in milliliters.

## Details

Milliliters and fluid ounces are the two most common units for measuring small liquid volumes. The tricky part is that US and imperial fluid ounces are not the same size.

**Key Conversion Factors:**

- 1 US fluid ounce = 29.5735 mL
- 1 imperial fluid ounce = 28.4131 mL
- 1 mL = 0.03381 US fl oz
- 1 mL = 0.03520 imp fl oz

**Common mL to US Fluid Ounce Conversions:**

| Milliliters | US Fluid Ounces | Common Use |
|------------|-----------------|------------|
| 5 mL | 0.169 fl oz | 1 teaspoon |
| 15 mL | 0.507 fl oz | 1 tablespoon |
| 30 mL | 1.014 fl oz | Shot glass |
| 240 mL | 8.115 fl oz | 1 US cup |
| 355 mL | 12.0 fl oz | Soda can |
| 500 mL | 16.907 fl oz | Water bottle |
| 750 mL | 25.361 fl oz | Wine bottle |
| 1000 mL | 33.814 fl oz | 1 liter |

**Why the difference matters:** If you follow a British recipe that calls for 5 fl oz and measure with a US fluid ounce cup, you will end up with about 4% more liquid than intended. For baking, that can throw off the result.

## Frequently Asked Questions

**Q: How many mL are in 1 fluid ounce?**

A: One US fluid ounce equals 29.5735 mL. One imperial fluid ounce equals 28.4131 mL. The US fluid ounce is about 4% larger than the imperial fluid ounce.

**Q: How do I convert mL to oz?**

A: Divide the milliliter value by 29.5735 to get US fluid ounces, or divide by 28.4131 to get imperial fluid ounces. For example, 250 mL / 29.5735 = 8.45 US fl oz.

**Q: Why are US and imperial fluid ounces different?**

A: The US fluid ounce is based on the US gallon (231 cubic inches), while the imperial fluid ounce is based on the imperial gallon (277.42 cubic inches). They evolved from different historical measurement standards.

**Q: Is a fluid ounce the same as a weight ounce?**

A: No. A fluid ounce (fl oz) measures volume, while an ounce (oz) measures weight. One fluid ounce of water weighs approximately one ounce, but this is only true for water. Other liquids like oil or honey have different densities.

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Source: https://vastcalc.com/calculators/conversion/ml-to-oz-converter
Category: Conversion
Last updated: 2026-04-08