MM → Inches
104 mm to inches
104 millimeters equals 4.094488 inches — or about 4 1/8" (nearest 1/16″).
Decimal
4.0945 in
Fraction
4 1/8"
Centimeters
10.4 cm
Feet
0.3412 ft
mm
4.094488
in≈ 4 1/8" (nearest 1/16)
1 in = 25.4 mm · tolerance ±0.0001
Formula
To convert mm to inches, divide by 25.4:
inches = mm ÷ 25.4
inches = 104 ÷ 25.4 = 4.094488
Why 104 mm = 4.0945 in
Since 1 inch is defined as exactly 25.4 millimeters, 104 mm converts to 4.094488 inches. Rounded to the nearest 1/16″ that's 4 1/8", which is what you'd read off a standard imperial ruler.