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Convert 1 1/4 inches to mm

1 1/4 inches = 31.75 mm

Result: 1 1/4 inches is equivalent to 31.75 millimeters.

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How many mm is 1 1/4 inches?

The answer is 31.75 millimeters, which is also the answer to the question "What is 1 1/4 inches in mm?".

How to convert 1 1/4 inches to mm?

To convert 1 1/4 inches to millimeters, follow these two steps: first convert the 1 1/4 inch fraction to decimal inches, and then convert the decimal inches to decimal millimeters.

To convert 1 1/4 inches from a fraction to a decimal, divide the numerator 1 by the denominator 4 and add the whole number 1 to get a decimal inch of 1.25 inches.

Since there are 25.4 mm in an inch, multiplying 1.25 inches by 25.4 gives us the answer in decimal inches to millimeters.

The answer and calculation process are listed below to show how to convert 1 1/4 inches to mm.

1 1/4 inches = 1 ÷ 4 + 1 = 1.25 in
1.25 in × 25.4 = 31.75 mm

Therefore, 1 1/4 inches is equal to 31.75 millimeters.

See also

  1. 2 1/4 inches to mm
  2. 1 1/4 inches to cm

Inch fraction to mm conversion table

Inches (fraction)Inches (decimal)Millimeters
1 1/2 in1.5 in38.1 mm
1 1/4 in1.25 in31.75 mm
1 3/4 in1.75 in44.45 mm
1 1/8 in1.125 in28.575 mm
1 3/8 in1.375 in34.925 mm
1 5/8 in1.625 in41.275 mm
1 7/8 in1.875 in47.625 mm
1 1/16 in1.0625 in26.9875 mm
1 3/16 in1.1875 in30.1625 mm
1 5/16 in1.3125 in33.3375 mm
1 7/16 in1.4375 in36.5125 mm
1 9/16 in1.5625 in39.6875 mm
1 11/16 in1.6875 in42.8625 mm
1 13/16 in1.8125 in46.0375 mm
1 15/16 in1.9375 in49.2125 mm
1 1/32 in1.0312 in26.1924 mm

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