MM → Inches
250 mm to inches
250 millimeters equals 9.84252 inches — or about 9 13/16" (nearest 1/16″).
Decimal
9.8425 in
Fraction
9 13/16"
Centimeters
25 cm
Feet
0.8202 ft
mm
9.84252
in≈ 9 13/16" (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 = 250 ÷ 25.4 = 9.84252
Why 250 mm = 9.8425 in
Since 1 inch is defined as exactly 25.4 millimeters, 250 mm converts to 9.84252 inches. Rounded to the nearest 1/16″ that's 9 13/16", which is what you'd read off a standard imperial ruler.