# What is the math equation to convert from mm to inches?

Relevance

1 inch = 25.4mm

therefore

1 mm = (1/25.4) inch

"Z" mm = (1/25.4) * Z inch

Source(s): Basic Maths -- SJ
• Jeff
Lv 7

Since 1 mm = 0.0393700787402 inches

M mm = M x (0.0393700787402) inches

• fizixx
Lv 7

There's a potentially easier way to remember this.

If you just remember that ââ 1" = 2.54 cm ââ then you can get a LOT of other conversions.

Just know that 1 cm = 10 mm, so 2.54 cm = 25.4 mm

Then 1" = 25.4 mm

âº 1 mm = (1/25.4)"

That's it.

Then multiply both sides by your mm value and you'll have your values in inches.