MM → Inches
17 mm to inches
17 millimeters equals 0.669291 inches — or about 11/16" (nearest 1/16″).
Decimal
0.6693 in
Fraction
11/16"
Centimeters
1.7 cm
Feet
0.0558 ft
mm
0.669291
in≈ 11/16" (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 = 17 ÷ 25.4 = 0.669291
Why 17 mm = 0.6693 in
Since 1 inch is defined as exactly 25.4 millimeters, 17 mm converts to 0.669291 inches. Rounded to the nearest 1/16″ that's 11/16", which is what you'd read off a standard imperial ruler.