Convert 1.50μm2 to m2
I do unit conversion by fractions. Set up an identity relating the two units:
1μm=10−6m Divide both sides by the unit you want to get rid of:
10−6m1μm=1
Now we can use that fraction to convert any micrometers we see into meters by multiplying. The value of the fraction is 1, so we don't affect the equation's truth at all, just the units. As we are converting square micrometers to square meters, we will have to multiply by the conversion fraction twice. The units will cancel properly if we set up the equation correctly, and there won't be any question about whether we divided when we should have multiplied, or vice versa.
1.50μm2∗10−6m1μm∗10−6m1μmObserve that the units cancel the way we want:1.50μm2∗10−6m1μm∗10−6m1μm=1.50∗10−6∗10−6m2
