This chart from FormStack illustrates the number of fields and the conversion rates for common form types. [Report PDF]
When reviewing your form’s conversion rates, remember that form types impact conversions. For example, if users click a link to enter a contest, they are probably ready to complete an entry form. But not everyone who visits your “Contact Us” page will need to submit a form; some might just be looking for your street address.
During episode 28 of the Beyond Social Media Show podcast, I discussed the concept of “charming forms.”