AI Unit Converters
v1.0

Fluid Ounce (US) to Cup (US Customary) Converter

1 Fluid Ounce (US) is equal to 0.125Cup (US Customary)s (cup). To convert fluid ounce (us)s to cup (us customary)s, multiply the value by 0.125 or use the interactive formula breakdown and reference tables below.

⇄

Volume Converter

Formula: --
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Step-by-Step Mathematical Derivation

Verified SI Standard
➡️ Convert Fluid Ounce (US) to Cup (US Customary)
Value in cup = Value in fl oz × 0.125

To convert any quantity from Fluid Ounce (US) to Cup (US Customary), multiply the quantity by the constant conversion factor 0.125.

⬅️ Convert Cup (US Customary) to Fluid Ounce (US) (Inverse)
Value in fl oz = Value in cup × 8

To reverse the operation, multiply your Cup (US Customary) figure by 8 (or divide by 0.125).

🔢 Step-by-Step Calculation Procedure:
  1. Identify the starting value in Fluid Ounce (US) (fl oz).
  2. Apply the exact linear conversion factor: 1 fl oz = 0.125 cup.
  3. Multiply the input value by 0.125 to obtain the exact measurement in Cup (US Customary) (cup).
  4. Verify precision against standard BIPM / NIST SP 811 statutory guidelines.
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All-Units Instant Matrix

Live Computed
Liter --
L
Milliliter --
mL
Cubic Meter --
m³
Gallon (US) --
gal
Gallon (Imperial) --
imp gal
Quart (US) --
qt
Pint (US) --
pt
Cup (US Customary) --
cup
Fluid Ounce (US) --
fl oz
Tablespoon (US) --
tbsp
Teaspoon (US) --
tsp
Cubic Foot --
ft³
Cubic Inch --
in³
🖨️

Printable Reference Cheat Sheet

Generate clean offline reference PDF tables for Volume & Liquid

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🎓

Academic & Research Citation Exporter

Cite this mathematical formula and conversion factor in research papers and wikis

BibTeX / APA / IEEE 
@misc{ai_unit_converter_fluid_ounce_(us)_to_cup_(us_customary),
  author       = {AI Unit Converters Standards Board},
  title        = {Exact Fluid Ounce (US) to Cup (US Customary) Conversion Factor and Mathematical Derivation},
  year         = {2026},
  howpublished = {\url{https://aiunitconverters.com/volume/fl_oz_us-to-cup_us}},
  note         = {Derived from NIST Special Publication 811 and BIPM SI Brochure}
}

📊Fluid Ounce (US) to Cup (US Customary) Conversion Tables

Fluid Ounce (US)s (fl oz)Cup (US Customary)s (cup)
1fl oz0.125cup
2fl oz0.25cup
5fl oz0.625cup
10fl oz1.25cup
15fl oz1.875cup
20fl oz2.5cup
25fl oz3.125cup
50fl oz6.25cup
75fl oz9.375cup
100fl oz12.5cup
250fl oz31.25cup
500fl oz62.5cup
1000fl oz125cup
5000fl oz625cup
10000fl oz1,250cup
Cup (US Customary)s (cup)Fluid Ounce (US)s (fl oz)
1cup8fl oz
2cup16fl oz
5cup40fl oz
10cup80fl oz
15cup120fl oz
20cup160fl oz
25cup200fl oz
50cup400fl oz
75cup600fl oz
100cup800fl oz
250cup2,000fl oz
500cup4,000fl oz
1000cup8,000fl oz
5000cup40,000fl oz
10000cup80,000fl oz
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❓ Frequently Asked Questions: Fluid Ounce (US) to Cup (US Customary)

How do you convert Fluid Ounce (US)s to Cup (US Customary)s?▼

1 Fluid Ounce (US) is equal to 0.125 Cup (US Customary)s. Multiply your input value in Fluid Ounce (US)s by 0.125 to obtain the exact equivalent in Cup (US Customary)s.

How many Cup (US Customary)s are in 1 Fluid Ounce (US)?▼

There are exactly 0.125Cup (US Customary)s (cup) in 1 Fluid Ounce (US) (fl oz).

Are these calculations calibrated against official measurement standards?▼

Yes. All conversion factors on AI Unit Converters are calibrated and cross-verified against official BIPM SI Brochure (9th Edition), NIST SP 811, and ISO 80000 measurement metrology standards.

Related volume Converters

Fluid Ounce (US) to LiterFluid Ounce (US) to MilliliterFluid Ounce (US) to Cubic MeterFluid Ounce (US) to Gallon (US)Fluid Ounce (US) to Gallon (Imperial)Fluid Ounce (US) to Quart (US)Fluid Ounce (US) to Pint (US)Fluid Ounce (US) to Cup (US Customary)Fluid Ounce (US) to Tablespoon (US)Fluid Ounce (US) to Teaspoon (US)Fluid Ounce (US) to Cubic FootFluid Ounce (US) to Cubic Inch