3 Oz to Cups
3 US fluid ounces equals 0.375 US cups (3/8 cup). Change the amount, swap units, or copy the result. Fluid volume only, not weight ounces.
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Default conversion: 3 US fl oz is 3/8 cup (0.375 cups); 6 US tbsp / approximately 88.72 mL.
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Calculation for 3 US fl oz
3 US fl oz ÷ 8 = 0.375 US cups = 3/8 cup. 3 US fl oz × 2 = 6 US tablespoons.
The cup fraction is exact for this whole-number fluid-ounce input. The milliliter equivalent is 3 × 29.5735295625, rounded to 88.72 mL. Weight ounces require ingredient-specific data and are not converted here.
All volume units in this converter are US customary units. The primary decimal is rounded to four places and milliliters to two. For arbitrary inputs, the displayed cup fraction is a nearby fraction with a denominator up to 16, not necessarily an exact equivalent. This does not convert weight ounces or Imperial fluid ounces. NIST unit conversion reference.
Real-World Context & Technical Standards
TSA Airport Carry-On Liquid Limit
Under the international 3-1-1 travel rule, airport security checkpoints limit carry-on liquids to containers holding 3.4 oz (100 mL) or less.
Six Tablespoons (3/8 Cup)
3 fluid ounces provides exactly 6 tablespoons of liquid, often called for in small sauce emulsifications and marinades.
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Frequently Asked Questions
How many cups is 3 oz of liquid?
There are 8 fluid ounces in 1 US cup. Dividing 3 by 8 gives 0.375 cups (or 3/8 cup).
How many tablespoons is 3 fl oz?
Each US fluid ounce equals 2 US tablespoons. Therefore, 3 US fl oz = 6 US tablespoons.
Can I convert 3 ounces by weight to cups here?
No. This tool converts volume, not mass. If 3 oz is a scale reading or a package's net weight, cups depend on the ingredient's density. A volume measured in US fluid ounces still follows the same volume ratio, regardless of the ingredient.
Does this use a metric cup or Imperial fluid ounce?
Neither. This tool uses US customary cups and US fluid ounces. Check the unit system in your recipe before using the result; different cup or fluid-ounce definitions are not interchangeable.