MM → Inches
48 mm to inches
48 millimeters equals 1.889764 inches — or about 1 7/8" (nearest 1/16″).
Decimal
1.8898 in
Fraction
1 7/8"
Centimeters
4.8 cm
Feet
0.1575 ft
mm
1.889764
in≈ 1 7/8" (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 = 48 ÷ 25.4 = 1.889764
Why 48 mm = 1.8898 in
Since 1 inch is defined as exactly 25.4 millimeters, 48 mm converts to 1.889764 inches. Rounded to the nearest 1/16″ that's 1 7/8", which is what you'd read off a standard imperial ruler.