MM → Inches
33 mm to inches
33 millimeters equals 1.299213 inches — or about 1 5/16" (nearest 1/16″).
Decimal
1.2992 in
Fraction
1 5/16"
Centimeters
3.3 cm
Feet
0.1083 ft
mm
1.299213
in≈ 1 5/16" (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 = 33 ÷ 25.4 = 1.299213
Why 33 mm = 1.2992 in
Since 1 inch is defined as exactly 25.4 millimeters, 33 mm converts to 1.299213 inches. Rounded to the nearest 1/16″ that's 1 5/16", which is what you'd read off a standard imperial ruler.