MM → Inches
5.8 mm to inches
5.8 millimeters equals 0.228346 inches — or about 1/4" (nearest 1/16″).
Decimal
0.2283 in
Fraction
1/4"
Centimeters
0.58 cm
Feet
0.019 ft
mm
0.228346
in≈ 1/4" (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 = 5.8 ÷ 25.4 = 0.228346
Why 5.8 mm = 0.2283 in
Since 1 inch is defined as exactly 25.4 millimeters, 5.8 mm converts to 0.228346 inches. Rounded to the nearest 1/16″ that's 1/4", which is what you'd read off a standard imperial ruler.