MM → Inches
28 mm to inches
28 millimeters equals 1.102362 inches — or about 1 1/8" (nearest 1/16″).
Decimal
1.1024 in
Fraction
1 1/8"
Centimeters
2.8 cm
Feet
0.0919 ft
mm
1.102362
in≈ 1 1/8" (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 = 28 ÷ 25.4 = 1.102362
Why 28 mm = 1.1024 in
Since 1 inch is defined as exactly 25.4 millimeters, 28 mm converts to 1.102362 inches. Rounded to the nearest 1/16″ that's 1 1/8", which is what you'd read off a standard imperial ruler.