MM → Inches
23 mm to inches
23 millimeters equals 0.905512 inches — or about 7/8" (nearest 1/16″).
Decimal
0.9055 in
Fraction
7/8"
Centimeters
2.3 cm
Feet
0.0755 ft
mm
0.905512
in≈ 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 = 23 ÷ 25.4 = 0.905512
Why 23 mm = 0.9055 in
Since 1 inch is defined as exactly 25.4 millimeters, 23 mm converts to 0.905512 inches. Rounded to the nearest 1/16″ that's 7/8", which is what you'd read off a standard imperial ruler.