Instructions: Type a value into the lefthand column. Then click in the righthand column to see the result. Metric/Imperial Converter Length Type in what you know Conversion Factor Result inches x 25.4 = millimeters feet x 30.48 = centimeters yards x 0.9144 = meters miles x 1.609 = kilometers -- millimeters x 0.03937 = inches centimeters x 0.3937 = inches meters x 1.0936 = yards kilometers x 0.6214 = miles