40 millimeters to inches

Q: How many inches is 40 millimeters?

40 millimeters is 1.5748 inches.

40 millimeters = 1.5748 inches

Rounded to a practical precision: 1.57 in.

millimeters

inches

How the calculation works

One millimeter is 0.0393701 inches, so:

40 mm × 0.0393701 = 1.5748 in

Reversing it, 1.5748 inches ÷ 0.0393701 returns 40 millimeters.

Nearby values

Millimeters	Inches
36 mm	1.41732 in
37 mm	1.45669 in
38 mm	1.49606 in
39 mm	1.53543 in
40 mm	1.5748 in
41 mm	1.61417 in
42 mm	1.65354 in
43 mm	1.69291 in
44 mm	1.73228 in

About these units

Millimeter (mm) — A millimetre is one thousandth of a metre and is the default unit on engineering drawings and rulers.

Inch (in) — An inch is exactly 25.4 millimetres and is used for screen sizes, pipe diameters and paper dimensions.

Frequently asked questions

How many inches is 40 millimeters?

40 millimeters is 1.5748 inches.

How do I convert millimeters to inches myself?

Multiply by 0.0393701. To go back, divide by 0.0393701 — or multiply by 25.4.

Is this figure exact?

The conversion factor between the millimeter and the inch is fixed by definition. The figure above is rounded for readability; the converter carries full precision.

Convert other values

Full millimeters to inches converter · All length converters