MM → Inches
133 mm to inches
133 millimeters equals 5.23622 inches — or about 5 1/4" (nearest 1/16″).
Decimal
5.2362 in
Fraction
5 1/4"
Centimeters
13.3 cm
Feet
0.4364 ft
mm
5.23622
in≈ 5 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 = 133 ÷ 25.4 = 5.23622
Why 133 mm = 5.2362 in
Since 1 inch is defined as exactly 25.4 millimeters, 133 mm converts to 5.23622 inches. Rounded to the nearest 1/16″ that's 5 1/4", which is what you'd read off a standard imperial ruler.