Mm to inches (Millimeters to In) inches to mm (Swap Units). Millimeters to Inches formula. In = mm. 0.039370. The inch is a unit of length used primarily in the imperial and U.S. Customary measurement systems, representing 1/12 of a foot and 1/36 of a yard. Inches to mm Conversion Inches Metric Inches Metric Inches Metric Inches Metric Fractional Decimal mm Fractional Decimal mm Fractional Decimal mm Fractional Decimal mm. 0.0039 0.1000 3/8 0.3750 9.5250 59/64 0.92. 0.0079 0.2000 25/64 0.3906 9.9219.
Convert inches to millimeters with this simple formula:
Converting an inch length measurement to a millimeter measurement involves multiplying the length by the conversion ratio to find the result. One inch is equal to 25.4 millimeters, so to convert simply multiply by 25.4.
Our inch fraction calculator can add inches and millimeters together and it also automatically converts the results to US customary, imperial and SI metric values.
Inches and millimeters are both units used to measure length. Learn more about length and find more length measurement conversion calculators. Inches are an imperial measurement and can be abbreviated as in, for example 1 in. Millimeters are a metric measurement and can be abbreviated as mm, for example 1 mm. Learn more about the metric system, including the common unit prefixes and how to convert between metric units.
Millimeter is spelled millimetre internationally, and it is equal in length to .1 centimeters, 1000 micrometers, or 5/127 inch. They are represented by the smallest ticks on most metric rulers. To get a reference point of the size, the thickness of a dime is 1.35mm.
The actual length of an inch has varied because of variances of the length of a foot. Throughout history it has been equal to 1/12 - 1/16 of a foot, but there are now exactly 12 inches in a foot. In 1959 the world agreed to the exact length of the national yard, .9144 meters. As such a foot is equal to .3048 meters and an inch is equal to 2.54 centimeters.
The standard ruler has 12', and metric combinations have 30 cm. Inches are also often measured using tape measures which commonly come in lengths from 6' - 35'. Other types of measuring devices include scales, calipers, measuring wheels, micrometers, yardsticks, and even lasers.
We recommend using a ruler or tape measure for measuring length, which can be found at a local retailer or home center. Rulers are available in imperial, metric, or combination with both values, so make sure you get the correct type for your needs. If you need a ruler you can also download and print our free printable rulers which include both imperial and metric measurements.