How to Convert Metric to Decimal

Metric and decimal are best known as two systems of measurement that rely on different unit bases. The system commonly used in the United States is the decimal system, or the "standard" system, whereas most countries outside of the United States use the metric system. Given that both systems were in use as of 2010, conversions between units in each system are useful and oftentimes necessary when working with hardware. The term "decimal" in reference to the standard system of measurements suggests lengthwise conversions -- those that deal with fractions of an inch.

Instructions

1

Determine the metric length that is to be converted. This can be found in the literature that accompanies the metric hardware. If this value is not easily referenced, measure the hardware with a metric-based ruler or set of calipers. The unit on this quantity should be millimeters (mm).

2

Write down the metric-to-decimal conversion factor of one inch per 25.4 millimeters (1 in/25.4 mm). From this it is easy to see that a multiplication of the metric quantity by this conversion factor will yield a value given in inches, as the "mm" units cancel one another out.

3

Multiply the metric quantity by the conversion factor. On your calculator, simply divide the metric quantity of the hardware by 25.4 to get a decimal value in units of inches.