MM → Inches
304 mm to inches
304 millimeters equals 11.968504 inches — or about 11 15/16" (nearest 1/16″).
Decimal
11.9685 in
Fraction
11 15/16"
Centimeters
30.4 cm
Feet
0.9974 ft
mm
11.968504
in≈ 11 15/16" (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 = 304 ÷ 25.4 = 11.968504
Why 304 mm = 11.9685 in
Since 1 inch is defined as exactly 25.4 millimeters, 304 mm converts to 11.968504 inches. Rounded to the nearest 1/16″ that's 11 15/16", which is what you'd read off a standard imperial ruler.