MM → Inches

38.1 mm to inches

38.1 millimeters equals 1.5 inches — or about 1 1/2" (nearest 1/16″).

Decimal

1.5 in

Fraction

1 1/2"

Centimeters

3.81 cm

Feet

0.125 ft

Millimeters (mm)

Inches (in)

1.5

≈ 1 1/2" (nearest 1/16)

1 in = 25.4 mm · tolerance ±0.0001

Nearby values

38 mm 38.5 mm 37.5 mm 39 mm 37 mm 40 mm 36 mm 41 mm 35 mm 42 mm

Precision

1.5

Inches

38.1 mm · max 100

Ref · 25.4 mm/in

Drag to set

Formula

To convert mm to inches, divide by 25.4:

inches = mm ÷ 25.4
inches = 38.1 ÷ 25.4 = 1.5

Why 38.1 mm = 1.5 in

Since 1 inch is defined as exactly 25.4 millimeters, 38.1 mm converts to 1.5 inches. Rounded to the nearest 1/16″ that's 1 1/2", which is what you'd read off a standard imperial ruler.