If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Curl measures how much a vector field is "spinning". A bit of a pain to calculate, but could come in handy when we work with Stokes' and Greens' theorems later on.
Curl measures the rotation in a fluid flowing along a vector field. Formally, curl only applies to three dimensions, but here we cover the concept in two dimensions to warmup.
Curl is an operator which measures rotation in a fluid flow indicated by a three dimensional vector field.
Introduction to the curl of a vector field
The mechanics of calculating curl.
More on curl