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21 Milliliters to Cups

21 milliliters equals 0.0888 cups. Use the formula, worked example, and conversion table below to check the math.

21 mL = 0.0888 cup
mL × 0.00422675 = cup
Try: 16 mL to cup 20 mL to cup 22 mL to cup 26 mL to cup
21 mL is also
21 mL = 0.021 L 21 mL = 0.005548 gal 21 mL = 0.7101 fl oz 21 mL = 0.0444 pt 21 mL = 0.0222 qt 21 mL = 1.42 tbsp 21 mL = 4.26 tsp
mL
0.0888 cup

How to Convert Milliliters to Cups

mL × 0.00422675 = cup
  1. Start with 21 mL
  2. Multiply by 0.00422675: 21 × 0.00422675 = 0.0888
  3. Result: 21 mL = 0.0888 cup

The same formula works for any value. Multiply by 0.00422675 to go from milliliters to cups.

Common Milliliter to Cup Conversions

Milliliters (mL) Cups (cup)
1 mL 0.004227 cup
2 mL 0.008454 cup
5 mL 0.0211 cup
10 mL 0.0423 cup
15 mL 0.0634 cup
20 mL 0.0845 cup
21 mL 0.0888 cup
25 mL 0.1057 cup
50 mL 0.2113 cup
75 mL 0.317 cup
100 mL 0.4227 cup
250 mL 1.06 cup
500 mL 2.11 cup
1,000 mL 4.23 cup
calculate Milliliter to Cup Converter swap_horiz Cup to Milliliter Converter functions Milliliter to Cup Formula water_drop All Volume / Capacity Conversions

Frequently Asked Questions

21 milliliters equals 0.0888 cups.
The formula is: mL × 0.00422675 = cup. See the mL to cup formula page for worked examples.
Use the cups to milliliters converter. The reverse formula is: cup × 236.588237 = mL.
The calculator uses the full-precision conversion factor for accuracy. Table values and displayed results are rounded for readability.
The conversion formula (mL × 0.00422675 = cup) is based on internationally defined standards. Displayed results are rounded for readability, while the calculator uses the full-precision factor.
person Written by Sean Day verified Reviewed by UnitCompare update Last updated Mar 28, 2026