138 Milliliters to Cups

138 mL ≈ 0.58329 cup

Calculation: cup = 138 mL × 0.00422675 ≈ 0.58329 cup

Milliliter to Cup Converter

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How much is 138 mL?

138 mL (4.7 fl oz) is about a rocks glass (old-fashioned glass) used for cocktails.

What does 138 mL look like?

Illustration of a rocks glass
138 mL (4.7 fl oz) is about a rocks glass (old-fashioned glass) used for cocktails.

138 mL on the cup scale

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138.0 mL = 0.5833 cup

How to Convert Milliliter to Cup

1 milliliter = 0.00422675 cups

Cup = Milliliter × 0.00422675

Example: 138 mL × 0.00422675 = 0.58329 cup

Reverse Conversion

To convert cups back to milliliters:

  • Remember, 1 cup equals 236.588 milliliters.
  • To convert 0.58329 cup to mL, multiply 0.58329 x 236.588, resulting in 138 mL.

138 mL is also equal to:

  • 0.138 liter
  • 0.29165 pint
  • 0.14582 quart
  • 4.6663 ounce

Frequently Asked Questions

How much is 138 milliliters in cups?

138 milliliters equals 0.58329 cups. This is calculated by multiplying 138 by the conversion factor 0.00422675.

What does 138 milliliters look like in cups?

138 milliliters (0.58329 cups) is a measuring cup or a small glass.

How do you calculate 138 milliliters to cups?

Multiply 138 by the conversion factor 0.00422675. The calculation is 138 × 0.00422675 = 0.58329 cups. This factor is defined by international measurement standards.

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138 milliliters = 0.583292 cups
138 milliliters = 0.583292 cups — conversion chart

Nearby Conversions

128 milliliters0.541 cups 129 milliliters0.5453 cups 130 milliliters0.5495 cups 131 milliliters0.5537 cups 132 milliliters0.5579 cups 133 milliliters0.5622 cups 134 milliliters0.5664 cups 135 milliliters0.5706 cups 136 milliliters0.5748 cups 137 milliliters0.5791 cups 139 milliliters0.5875 cups 140 milliliters0.5917 cups 141 milliliters0.596 cups 142 milliliters0.6002 cups 143 milliliters0.6044 cups 144 milliliters0.6087 cups 145 milliliters0.6129 cups 146 milliliters0.6171 cups 147 milliliters0.6213 cups 148 milliliters0.6256 cups

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

Also convert Milliliters 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.