About

In the culinary and beverage industries, volume conversion is a daily necessity. However, a common pitfall is the distinction between US Fluid Ounces and Imperial (UK) Fluid Ounces. While they share a name, they represent different volumes. A US fluid ounce is approx 29.57 ml, whereas an Imperial ounce is 28.41 ml. This discrepancy of roughly 4% can significantly alter the balance of flavors in cocktails or the chemistry in baking.

This tool provides a toggle to switch between these standards, ensuring your recipe turns out exactly as intended, whether you are following a New York bartender's guide or a classic British cookbook. The default is set to US Ounces, the most common standard in global commerce today.

Formulas

The conversion relies on specific constants defined by international weights and measures bureaus.

{

V_oz(US) = V_ml × 0.033814V_oz(UK) = V_ml × 0.035195

Reference Data

Milliliters (ml)	US Fluid Ounces (fl oz)	UK Fluid Ounces (fl oz)
1 ml	0.0338 oz	0.0352 oz
15 ml (1 tbsp)	0.51 oz	0.53 oz
30 ml (1 shot)	1.01 oz	1.06 oz
100 ml	3.38 oz	3.52 oz
240 ml (1 Cup US)	8.12 oz	8.45 oz
330 ml (Soda Can)	11.16 oz	11.61 oz
500 ml	16.91 oz	17.60 oz
750 ml (Wine Bottle)	25.36 oz	26.40 oz
1,000 ml (1 Liter)	33.81 oz	35.20 oz

Frequently Asked Questions

No. The US fluid ounce is slightly larger than the UK fluid ounce. Specifically, 1 US fl oz = 29.5735 ml, while 1 UK fl oz = 28.4131 ml.

Check the origin of the recipe. If it's from the United States, use US Ounces. If it's from the UK, Canada (older recipes), or Australia, use Imperial/UK Ounces.

No. Fluid ounces measure volume (liquid space), while dry ounces measure weight (mass). This tool only converts volume (ml) to fluid ounces.

A standard US shot is usually 1.5 fl oz (44 ml), though some places pour 1.0 or 1.25 oz. In the UK, a standard spirit measure is often 25 ml or 35 ml, not typically measured in ounces anymore.