# What is dimensional analysis used for?

Dimensional Analysis is used in engineering as a simple way to check one's work.

After someone solves a problem, especially a conversion, they need someway to check that are correct. An easy way to do that is to check the units you were given, and seen if they make sense for what you ended up with.

To check your work, let's just with the units:

There, now they look the same! So that is an indication that we did the math right. It doesn't guarantee we're correct, but if dimensional analysis shows we made a mistake, it gives us a chance to catch it

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Dimensional analysis is used to convert units, check the consistency of equations, derive relationships between physical quantities, and solve problems involving physical quantities.

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