Authoritative definitions of the International System of Units and SI prefixes.
Unit conversion
US cups to US fluid ounces Converter
1 cup ≈ 7.99999998986 fl oz. Enter a value to convert cup to fl oz, then use the formula and table below. Displayed digits may be rounded.
VolumeInstant result
Decimals
Formula result = input × 0.2365882365 ÷ 0.0295735296. 1 cup ≈ 8 fl oz
Nonzero results too small for the selected decimal places use scientific notation.
Nonzero results too small for the selected decimal places use scientific notation.
Common examples
One value, several units
Litres0.2366 L
Millilitres236.5882 mL
Cubic metres0.0002 m³
Cubic centimetres236.5882 cm³
US gallons0.0625 US gal
Imperial gallons0.052 imp gal
US quarts0.25 qt
US fluid ounces8 fl oz
Conversion table
| cup | fl oz |
|---|---|
| 1 cup | 8 fl oz |
| 2 cup | 16 fl oz |
| 5 cup | 40 fl oz |
| 10 cup | 80 fl oz |
| 25 cup | 200 fl oz |
| 50 cup | 400 fl oz |
| 100 cup | 800 fl oz |
Conversion chart
1 cup8 fl oz
5 cup40 fl oz
10 cup80 fl oz
25 cup200 fl oz
50 cup400 fl oz
Worked example
1 cup ≈ 7.99999998986 fl oz. Apply the selected conversion formula to other input values.
Unit definition
US cups (cup) One us cups equals 0.2365882365 litre.
Unit history
US cups is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert cup to litre.
3. Convert the base value to fl oz and apply your display precision.
Understand the result before using it
US cups to US fluid ounces converts a value measured in US cups (cup) into the equivalent value in US fluid ounces (fl oz). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 0.2365882365 ÷ 0.0295735296
Assumptions
- US cups and US fluid ounces represent the same volume quantity.
- The input is expressed in cup; the output is expressed in fl oz.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 cup ≈ 7.99999998986 fl oz. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a cup measurement in a document that expects fl oz.
- Compare a us cups value with a value reported in us fluid ounces.
- Check the cup to fl oz arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- US gallons and imperial gallons are different units; select the one your source actually uses.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert US cups to US fluid ounces?
result = input × 0.2365882365 ÷ 0.0295735296. Input is in cup; result is in fl oz. 1 cup ≈ 7.99999998986 fl oz. The displayed digits may be rounded.
What is 1 cup in fl oz?
1 cup ≈ 7.99999998986 fl oz. The displayed digits may be rounded.
Can I reverse the cup to fl oz conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts fl oz back to cup.
Is the US cups to US fluid ounces result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.