120 Ounces to Cups

120 fl oz = 15 cup

Calculation: cup = 120 fl oz × 0.125 = 15 cup

Ounce to Cup Converter

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How much is 120 fl oz?

3,549 mL (120 fl oz) equals about 3.55 liters, a large container volume.

120 fl oz on the cup scale

fl oz050100.0150.0200.0cup0510152025

120.0 fl oz = 15 cup

Did you know? One US gallon is 3,785 mL.

1 US gallon = 3,785 mL = 128 fl oz. The Imperial (UK) gallon is larger at 4,546 mL.

How to Convert Ounce to Cup

1 ounce = 18 cups

Cup = Ounce × 18

Example: 120 fl oz × 18 = 15 cup

Reverse Conversion

To convert cups back to ounces:

  • Remember, 1 cup equals 8 ounces.
  • To convert 15 cup to fl oz, multiply 15 x 8, resulting in 120 fl oz.

120 fl oz is also equal to:

Frequently Asked Questions

How much is 120 ounces in cups?

120 ounces equals 15 cups. This is calculated by multiplying 120 by the conversion factor 0.125.

What does 120 ounces look like in cups?

120 ounces (15 cups) is a quart to a gallon — a large bottle or jug.

How do you calculate 120 ounces to cups?

Multiply 120 by the conversion factor 0.125. The calculation is 120 × 0.125 = 15 cups. This factor is defined by international measurement standards.

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120 ounces = 15 cups
120 ounces = 15 cups — conversion chart

Nearby Conversions

40 ounces5 cups 48 ounces6 cups 56 ounces7 cups 64 ounces8 cups 72 ounces9 cups 80 ounces10 cups 88 ounces11 cups 96 ounces12 cups 104 ounces13 cups 112 ounces14 cups 128 ounces16 cups 136 ounces17 cups 144 ounces18 cups 152 ounces19 cups 160 ounces20 cups 168 ounces21 cups 176 ounces22 cups 184 ounces23 cups 192 ounces24 cups 200 ounces25 cups

For general conversions between ounces and cups, see the ounces to cups converter.

Also convert Ounces to:

Conversion factors verified against NIST, BIPM, ISO 80000-3 1 US gallon = 3.785411784 L (exact, US customary). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.