Fraction numerator 1000 space text mg end text over denominator 1 text g end text end fraction Find the conversion factor.

Note: Write the conversion factor so that, when multiplied by the original value, the old units cancel.

Grams is the unit that should cancel, so place grams in the denominator of the conversion factor.

fraction numerator 5 space text g end text over denominator 1 end fraction Write the original value as a fraction.
left parenthesis fraction numerator 5 space up diagonal strike text g end text end strike over denominator 1 end fraction right parenthesis left parenthesis fraction numerator 1000 space text mg end text over denominator 1 space up diagonal strike text g end text end strike end fraction right parenthesis
Multiply the original value by the conversion factor.

5 comma 000 space text mg end text Multiply.