MM → Inches
242 mm to inches
242 millimeters equals 9.527559 inches — or about 9 1/2" (nearest 1/16″).
Decimal
9.5276 in
Fraction
9 1/2"
Centimeters
24.2 cm
Feet
0.794 ft
mm
9.527559
in≈ 9 1/2" (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 = 242 ÷ 25.4 = 9.527559
Why 242 mm = 9.5276 in
Since 1 inch is defined as exactly 25.4 millimeters, 242 mm converts to 9.527559 inches. Rounded to the nearest 1/16″ that's 9 1/2", which is what you'd read off a standard imperial ruler.