Answer
4000 mm
Work Step by Step
4 m to mm
Put the unit for the answer (millimeters) in the numerator of the unit fraction; put the unit you want to change (m) in the denominator.
Unit Fraction equivalent to 1 = (1000 millimeters)/(1 meter)
Multiply 4 m times the unit fraction.
4 m * (1000 millimeters)/(1 meter) = 4000 mm