Ounces to Cups Calculator — fl oz to Cups, Tablespoons, mL
Convert US fluid ounces to cups and every other common liquid or cooking measurement — tablespoons, teaspoons, pints, quarts and millilitres — in one step.
fl oz
US customary cups (1 cup = 8 fl oz = 236.6 mL)
- 1
Scale: 1 cup = 8 fl oz
8The US customary cup is defined as exactly 8 fluid ounces (≈ 236.6 mL). - 2
Divide fl oz by 8
16 ÷ 8 = 2
How does this calculator work?
Cups = fl oz ÷ 8 (1 US cup = 8 fl oz = 236.6 mL). Quick lookup: 2 fl oz = ¼ cup, 4 fl oz = ½ cup, 8 fl oz = 1 cup, 16 fl oz = 1 pint, 32 fl oz = 1 quart. Converter shows tablespoons (2 per fl oz) and teaspoons (6 per fl oz) too.
Formula
How this is calculated
The US customary cup is defined as exactly 8 US fluid ounces, and 1 US fluid ounce is exactly 29.5735295625 mL (fixed by the 1959 international yard-and-pound agreement). All conversions chain from those two exact values: cups = fl oz ÷ 8; millilitres = fl oz × 29.574; tablespoons = fl oz × 2; teaspoons = fl oz × 6; pints = fl oz ÷ 16; quarts = fl oz ÷ 32.
These are all US customary units. The UK (imperial) fluid ounce is slightly larger (28.413 mL vs 29.574 mL), and the metric cup used in Australia, Canada and the UK is 250 mL rather than the US cup's 236.6 mL. If your recipe specifies UK or metric cups, treat results as a close approximation rather than an exact conversion.
For cooking, a quick reference: 1 fl oz = 2 tablespoons; 2 fl oz = ¼ cup; 4 fl oz = ½ cup; 8 fl oz = 1 cup; 16 fl oz = 1 pint = 2 cups; 32 fl oz = 1 quart = 4 cups.
Frequently asked questions
Exactly 1 US cup. The US cup is defined as 8 fluid ounces, equal to 16 tablespoons, 48 teaspoons, or about 236.6 mL.
Half a US cup is exactly 4 fluid ounces (8 tablespoons, about 118.3 mL). Quick fractions: ¼ cup = 2 fl oz, ⅓ cup ≈ 2.67 fl oz, ½ cup = 4 fl oz, ⅔ cup ≈ 5.33 fl oz, ¾ cup = 6 fl oz.
No. A fluid ounce measures volume; a weight (avoirdupois) ounce measures mass. One cup of water weighs roughly 8.3 weight ounces because water is close to 1 g/mL, but oils, honey and other liquids have different densities, so the weight per cup will differ.
Also known as
TG we-Calculate Editorial Team. (2026). Ounces to Cups Calculator — fl oz to Cups, Tablespoons, mL [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/ounces-to-cups-calculator
TG we-Calculate Editorial Team. "Ounces to Cups Calculator — fl oz to Cups, Tablespoons, mL." TG we-Calculate. 2026. https://we-calculate.com/calculator/ounces-to-cups-calculator.
TG we-Calculate Editorial Team, "Ounces to Cups Calculator — fl oz to Cups, Tablespoons, mL," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/ounces-to-cups-calculator
@misc{wecalculate_ounces_to_cups_calculator, title = {Ounces to Cups Calculator — fl oz to Cups, Tablespoons, mL}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/ounces-to-cups-calculator}}, year = {2026}, note = {TG we-Calculate} }
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