# Convert millimeters to inches

Convert millimeters to inches to calculate mm to inch. For instance, 10 millimeters to inches is approximately 0.394 inch.. The inverse of the calculation is inches per millimeters.

## Millimeter

Millimeter (abbreviated mm) – this is one thousandth of a meter. In scientific notation, 1 millimeter is 1 – E3 m, which means 0.001 x 1 m.

## Inch

Inch (abbreviated in) – is defined as an imperial unit. So as a measurement system used in Great Britain and British colonies. The measure of an inch was initially three times the length of an average barley grain. In other units, it is also 1/12 of a foot. As with other common measures of length, the inch has had different names and lengths throughout its history. The name of the country in which it was used was additionally added to the name “cal”. Depending on the country, this value ranged from 23.22 mm for the Spanish inch mm to about 27.07 for the French inch.

## Convert millimeters to inches according to the formula

Formula: to convert millimeters to inches, divide millimeters by 25.4.

1 millimeter is approx 0.03937 inch

Example: 10 millimeters is equal to about 0.03937 inch.

## The use of millimeters to inches converter in length and depth

Convert millimeters to inches to get results. Converter can be useful to measure objects of their length and depth. These measures are usually similar to each other, therefore a constant metric SI unit is used to describe these objects. However, sometimes it is necessary to represent length and depth in less common metric units. For this, it makes sense to convert millimeters to inches.

The length of the rivers:

• Amu Darya–Panj 2620 km (Aral Sea) it is 2620000000 mm as well as 103149606.299 in.
• Stony Tunguska 1865 km (Yenisei) it is 1865000000 mm as well as 73425196.85 in.
• Khatanga 1600 km (Laptev Sea) it is 1600000000 mm as well as 62992125.984 in.
• Colorado (Texas) 1438 km (Gulf of Mexico) it is 1438000000 mm as well as 56614173.228 in.

The depth of the caves:

• Sarma cave 1830 m (Abkhazia / Georgia) this depth means 1830000 mm and 72047.244 in.
• Gouffre Mirolda 1733 m (France) this depth means 1733000 mm and 68228.346 in.
• Egma Sinkhole 1429 m (Turkey) this depth means 1429000 mm and 56259.843 in.
• Gouffre de La Pierre Saint-Martin 1410 m (France) this depth means 1410000 mm and 55511.811 in.