Convert millimeters to inches

Accurate tool to convert between mm and in

Length

1
Save this conversion to your history

Millimeters

The millimeter is a unit of length in the metric system equal to one thousandth of a meter.

Inches

The inch is a unit of length in the imperial system equal to 2.54 centimeters.

Formula

To convert from millimeters to inches, divide the length by 25.4.

millimeters (mm)

Description

The millimeter is a unit of length in the metric system equal to one thousandth of a meter.

History

Defined in 1795 as part of the metric system numbering, based on one ten-millionth of the distance from the equator to the North Pole.

Symbol Origin

Derived from 'milli' (thousandth) and 'meter'.

Usage Context

Commonly used in engineering, manufacturing, and for measuring small objects like rain, screws, or paper thickness.

Main Usage

International use

Did you know?

A standard credit card is about 0.76 mm thick.

inches (in)

Description

The inch is a unit of length in the imperial system equal to 2.54 centimeters.

History

Historically based on the width of a human thumb. In the 14th century, it was defined as the length of three barleycorns placed end to end.

Symbol Origin

Derived from the Latin 'uncia', meaning 'one-twelfth' (of a foot).

Usage Context

Used for screen sizes (TVs, phones), tire rim diameters, and paper sizes (US Letter).

Main Usage

United States United Kingdom Canada

Did you know?

The international inch was exactly defined as 25.4 mm in 1959 to unify the US and British standards.

Quick Conversion Table

millimeters (mm) inches (in)
1 0.0393701
2 0.0787402
5 0.19685
10 0.393701
25 0.984252
50 1.9685
100 3.93701
500 19.685
1000 39.3701
2500 98.4252
5000 196.85
10000 393.701

Frequently Asked Questions

How to convert millimeters to inches?

To convert from millimeters to inches, divide the length by 25.4.

How many inches in 1 millimeters?

1 millimeters is equal to 0.0393701 inches.

What is a millimeters?

The millimeter is a unit of length in the metric system equal to one thousandth of a meter.

What is a inches?

The inch is a unit of length in the imperial system equal to 2.54 centimeters.