# How Many Inches in 21 Millimeters?

21 Millimeters (mm) to inches converter. How many inches in 21 mm?

21 Millimeters equal to 0.8267717 inches or there are 0.8267717 inches in 21 mm.

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## How to convert 21 mm to inches?

The conversion factor from mm to inches is 0.0393700787. To convert any value of mm to inches, multiply the millimeter value by the conversion factor.

To convert 21 mm to inches, multiply 21 by 0.0393700787 (or divide by 25.4), that makes 21 mm equal to 0.8267717 inches.

21 mm to inches formula

inch = mm value * 0.0393700787

inch = 21 * 0.0393700787

inch = 0.8267717

Common conversions from 21.x mm to inches:
(rounded to 3 decimals)

• 21 mm = 0.827 inches
• 21.1 mm = 0.831 inches
• 21.2 mm = 0.835 inches
• 21.3 mm = 0.839 inches
• 21.4 mm = 0.843 inches
• 21.5 mm = 0.846 inches
• 21.6 mm = 0.85 inches
• 21.7 mm = 0.854 inches
• 21.8 mm = 0.858 inches
• 21.9 mm = 0.862 inches

What is a Millimeter?

Millimeter (centimetre) is a metric system unit of length. 1 Millimeter = 0.0393700787 Inch. The symbol is "mm".

What is a Inch?

Inch is an imperial and United States Customary systems unit of length, equal to 1/12 of a foot. 1 inch = 25.4 mm. The symbol is "in".

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